Update deploy scripts

Improve date handling for the calendar widget
Fix timezone parsing for calendars
2026-04-06 08:49:33 +02:00 · 2026-04-06 08:49:14 +02:00 · 2026-04-03 15:40:06 +02:00 · 2026-04-03 15:27:34 +02:00 · 2026-04-03 15:27:26 +02:00 · 2026-04-03 15:14:42 +02:00
28 changed files with 3763 additions and 1452 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 _agent-data/
+.claude/
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,26 +0,0 @@
-{
-  // Developer quality-of-life:
-  // If you add a DokuWiki checkout as ./_dokuwiki (see README), Intelephense will
-  // index it and resolve DokuWiki base classes (ActionPlugin, SyntaxPlugin, etc.).
-  "intelephense.environment.includePaths": [
-    "./_dokuwiki",
-    "./_dokuwiki/inc",
-    "./_dokuwiki/lib",
-    "./_dokuwiki/vendor"
-  ],
-
-  // DokuWiki replaces @ini_* placeholders server-side.
-  // VS Code's CSS validator doesn't understand those tokens, but LESS does.
-  "files.associations": {
-    "style.css": "less",
-    "temp-input-colors.css": "less"
-  },
-
-  // Keep the file explorer tidy when the optional DokuWiki checkout exists.
-  "files.exclude": {
-    "**/_dokuwiki/.git": true,
-    "**/_dokuwiki/data": true,
-    "**/_dokuwiki/conf": true,
-    "**/_dokuwiki/cache": true
-  }
-}
--- a/.zed/settings.json
+++ b/.zed/settings.json
@@ -0,0 +1,5 @@
+{
+  "file_types": {
+    "LESS": ["style.css"],
+  },
+}
--- a/README.md
+++ b/README.md
@@ -447,8 +447,117 @@ If a slot has a CalDAV URL configured, the admin panel provides a sync button.
 Triggering sync downloads all calendar objects from the remote CalDAV collection
 and merges them into the slot's local `.ics` file.

-Sync is admin-only and does not run automatically. For scheduled sync, set up
-a cron job that triggers the sync via the DokuWiki AJAX endpoint.
+Sync can also be triggered from any wiki page using the inline syntax:
+
+```
+{{calendar_sync>}}
+```
+
+The sync button is only visible to admins. Non-admin users see nothing.
+
+Sync is admin-only and does not run automatically. For scheduled sync, see the
+automatic sync section below.
+
+### 0.12) Event popup improvements
+
+Clicking an event on a day page or in the calendar widget opens the event detail popup.
+When the popup is opened from a specific day context (e.g. clicking an event in a calendar
+day cell), the date is hidden and only the time is shown (since the day is already known).
+
+Clicking empty space inside a calendar day cell opens a day popup listing all events for
+that day. If there are no events, a "No events" message is shown.
+
+### 0.13) Event creation
+
+Authenticated users can create new calendar events from the day popup.
+
+1. Click empty space in a calendar day cell to open the day popup.
+2. Click "Create Event".
+3. Fill in the form: summary (required), date, all-day toggle, start/end time,
+   location, description, and target calendar slot.
+4. Click "Save".
+
+The event is written to the local `.ics` file immediately. If the slot has a
+CalDAV URL configured, the event is also uploaded to the remote server.
+
+### 0.14) Event editing
+
+Authenticated users can edit existing calendar events from the event popup.
+
+1. Click an event to open the detail popup.
+2. Click "Edit".
+3. Modify the fields and click "Save".
+
+For recurring events, editing creates or updates an occurrence override rather
+than modifying the master event.
+
+Changes are written to the local `.ics` file first, then pushed to CalDAV if
+configured.
+
+### 0.15) Event deletion
+
+Authenticated users can delete events from the event popup.
+
+1. Click an event to open the detail popup.
+2. Click "Delete".
+3. Confirm the deletion.
+
+For recurring events, you are asked whether to delete:
+- **This occurrence**: Adds an EXDATE to the master event.
+- **This and future occurrences**: Sets an UNTIL date on the RRULE.
+- **All occurrences**: Removes all components with this UID.
+
+Deletion is applied to the local `.ics` file first, then to CalDAV if configured.
+
+### 0.16) Automatic sync proposal
+
+Automatic calendar sync is not currently implemented. The recommended approach
+for a long-lived personal DokuWiki plugin:
+
+**Option A: Cron calling the AJAX endpoint (simplest)**
+
+```cron
+*/15 * * * * curl -s -X POST 'https://wiki.example.com/lib/exe/ajax.php' \
+  -d 'call=luxtools_calendar_sync&sectok=ADMIN_TOKEN' \
+  --cookie 'DokuWikiCookie=SESSION_ID'
+```
+
+Pros: Reuses the existing sync endpoint with no code changes.
+Cons: Requires a valid admin session cookie and security token, which expire and
+must be refreshed. Fragile for long-term unattended use.
+
+**Option B: CLI script (recommended)**
+
+Create `bin/calendar-sync.php` that boots DokuWiki from the command line,
+loads the plugin, and calls `CalendarSyncService::syncAll()` directly.
+
+```cron
+*/15 * * * * php /path/to/dokuwiki/lib/plugins/luxtools/bin/calendar-sync.php
+```
+
+Pros: No session management, no authentication needed, runs as the web server user.
+Cons: Requires a small CLI entry point script.
+
+**Recommendation**: Option B is more robust and maintainable. A CLI script can
+be as simple as:
+
+```php
+<?php
+// Boot DokuWiki
+define('DOKU_INC', '/path/to/dokuwiki/');
+require_once(DOKU_INC . 'inc/init.php');
+require_once(__DIR__ . '/../autoload.php');
+
+use dokuwiki\plugin\luxtools\CalendarSlot;
+use dokuwiki\plugin\luxtools\CalendarSyncService;
+
+$plugin = plugin_load('action', 'luxtools');
+if (!$plugin) { fwrite(STDERR, "Plugin not loaded\n"); exit(1); }
+
+$slots = CalendarSlot::loadEnabled($plugin);
+$result = CalendarSyncService::syncAll($slots);
+echo $result['ok'] ? "Sync completed.\n" : "Sync completed with errors.\n";
+```

 ### Known limitations

@@ -460,10 +569,14 @@ a cron job that triggers the sync via the DokuWiki AJAX endpoint.
  overwrite it on next sync.

 - **Sync direction**: Sync is currently one-directional (remote → local). Local
-  changes made via task completion are written back to the remote individually,
-  but a full remote-to-local sync may overwrite local changes if the remote
-  still has stale data. The completion write-back updates the remote immediately
-  to mitigate this.
+  changes (event creation, editing, deletion, task completion) are written back
+  to the remote immediately when CalDAV is configured. However, a full
+  remote-to-local sync may overwrite local changes if the remote still has stale
+  data. The immediate write-back mitigates this in most cases.
+
+- **Event creation/editing permissions**: Event CRUD operations require an
+  authenticated DokuWiki user. Admin access is not required for event management,
+  only for calendar sync.

 ### 1) List files by glob pattern

--- a/action.php
+++ b/action.php
--- a/admin/main.php
+++ b/admin/main.php
@@ -9,7 +9,7 @@ if (!defined('DOKU_INC')) die();
 class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
 {
    /** @var string[] Calendar slot keys */
-    protected $calendarSlotKeys = ['general', 'maintenance', 'slot3', 'slot4'];
+    protected $calendarSlotKeys = ['general', 'slot2', 'slot3', 'slot4'];

    /** @var string[] */
    protected $configKeys = [
@@ -38,12 +38,12 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
        'calendar_general_password',
        'calendar_general_color',
        'calendar_general_display',
-        'calendar_maintenance_file',
-        'calendar_maintenance_caldav_url',
-        'calendar_maintenance_username',
-        'calendar_maintenance_password',
-        'calendar_maintenance_color',
-        'calendar_maintenance_display',
+        'calendar_slot2_file',
+        'calendar_slot2_caldav_url',
+        'calendar_slot2_username',
+        'calendar_slot2_password',
+        'calendar_slot2_color',
+        'calendar_slot2_display',
        'calendar_slot3_file',
        'calendar_slot3_caldav_url',
        'calendar_slot3_username',
@@ -278,9 +278,9 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
        // Calendar slot settings
        $slotLabels = [
            'general' => 'General',
-            'maintenance' => 'Maintenance',
-            'slot3' => 'Slot 3',
-            'slot4' => 'Slot 4',
+            'slot2'   => 'Slot 2',
+            'slot3'   => 'Slot 3',
+            'slot4'   => 'Slot 4',
        ];
        $displayOptions = [
            'none' => (string)$this->getLang('calendar_slot_display_none'),
--- a/conf/default.php
+++ b/conf/default.php
@@ -37,7 +37,7 @@ $conf['open_service_url'] = 'http://127.0.0.1:8765';
 // Base filesystem path for chronological photo integration.
 $conf['image_base_path'] = '';

-// Calendar slot configuration (4 slots: general, maintenance, slot3, slot4)
+// Calendar slot configuration (4 slots: general, slot2, slot3, slot4)
 // Each slot has: file, caldav_url, username, password, color, display
 $conf['calendar_general_file'] = '';
 $conf['calendar_general_caldav_url'] = '';
@@ -46,12 +46,12 @@ $conf['calendar_general_password'] = '';
 $conf['calendar_general_color'] = '#4a90d9';
 $conf['calendar_general_display'] = 'none';

-$conf['calendar_maintenance_file'] = '';
-$conf['calendar_maintenance_caldav_url'] = '';
-$conf['calendar_maintenance_username'] = '';
-$conf['calendar_maintenance_password'] = '';
-$conf['calendar_maintenance_color'] = '#e67e22';
-$conf['calendar_maintenance_display'] = 'none';
+$conf['calendar_slot2_file'] = '';
+$conf['calendar_slot2_caldav_url'] = '';
+$conf['calendar_slot2_username'] = '';
+$conf['calendar_slot2_password'] = '';
+$conf['calendar_slot2_color'] = '#e67e22';
+$conf['calendar_slot2_display'] = 'none';

 $conf['calendar_slot3_file'] = '';
 $conf['calendar_slot3_caldav_url'] = '';
--- a/deploy.ps1
+++ b/deploy.ps1
@@ -11,7 +11,8 @@ $TARGET = "S:\7-Infrastructure\lib\plugins\luxtools"
 $DRY_RUN = $false
 $DELETE = $true

-function Resolve-PathUsingExistingCase {
+function Resolve-PathUsingExistingCase
+{
    param(
        [Parameter(Mandatory = $true)]
        [string]$Path
@@ -20,7 +21,8 @@ function Resolve-PathUsingExistingCase {
    $fullPath = [System.IO.Path]::GetFullPath($Path)
    $root = [System.IO.Path]::GetPathRoot($fullPath).TrimEnd('\\')

-    if ($fullPath.TrimEnd('\\') -ieq $root) {
+    if ($fullPath.TrimEnd('\\') -ieq $root)
+    {
        return $root
    }

@@ -28,12 +30,14 @@ function Resolve-PathUsingExistingCase {
    $leaf = Split-Path -Path $fullPath -Leaf
    $resolvedParent = Resolve-PathUsingExistingCase -Path $parent

-    if (Test-Path -LiteralPath $resolvedParent) {
+    if (Test-Path -LiteralPath $resolvedParent)
+    {
        $match = Get-ChildItem -LiteralPath $resolvedParent -Force -ErrorAction SilentlyContinue |
            Where-Object { $_.Name -ieq $leaf } |
            Select-Object -First 1

-        if ($null -ne $match) {
+        if ($null -ne $match)
+        {
            return (Join-Path -Path $resolvedParent -ChildPath $match.Name)
        }
    }
@@ -41,18 +45,22 @@ function Resolve-PathUsingExistingCase {
    return (Join-Path -Path $resolvedParent -ChildPath $leaf)
 }

-foreach ($arg in $args) {
-    if ($arg -eq "--dry-run" -or $arg -eq "-n") {
+foreach ($arg in $args)
+{
+    if ($arg -eq "--dry-run" -or $arg -eq "-n")
+    {
        $DRY_RUN = $true
        continue
    }

-    if ($arg -eq "--no-delete") {
+    if ($arg -eq "--no-delete")
+    {
        $DELETE = $false
        continue
    }

-    if ($arg -eq "-h" -or $arg -eq "--help") {
+    if ($arg -eq "-h" -or $arg -eq "--help")
+    {
        Get-Content $PSCommandPath
        exit 0
    }
@@ -65,7 +73,8 @@ $TARGET = Resolve-PathUsingExistingCase -Path $TARGET
 $SRC_DIR = $PSScriptRoot

 # Safety checks: make sure source looks like luxtools plugin
-if (-not (Test-Path "$SRC_DIR/plugin.info.txt")) {
+if (-not (Test-Path "$SRC_DIR/plugin.info.txt"))
+{
    Write-Error "Error: '$SRC_DIR' doesn't look like luxtools (missing plugin.info.txt)."
    exit 1
 }
@@ -75,11 +84,14 @@ New-Item -ItemType Directory -Force -Path "$TARGET" | Out-Null

 # Safety check: refuse to deploy to an obviously wrong directory.
 # Allow empty dir (fresh install) OR existing luxtools plugin dir.
-if (Test-Path "$TARGET/plugin.info.txt") {
+if (Test-Path "$TARGET/plugin.info.txt")
+{
    $content = Get-Content "$TARGET/plugin.info.txt" -ErrorAction SilentlyContinue
-    if ($content -match "^base\s+luxtools" -or $content -match "^base\s+luxtools\s+") {
+    if ($content -match "^base\s+luxtools" -or $content -match "^base\s+luxtools\s+")
+    {
        # It's a luxtools plugin, allow it
-    } else {
+    } else
+    {
        Write-Error "Error: target '$TARGET' has a plugin.info.txt, but it doesn't look like luxtools."
        Write-Error "Refusing to deploy."
        exit 1
@@ -92,6 +104,8 @@ $EXCLUDE_DIRS = @(
    "_agent-data",
    ".github",
    ".vscode",
+    ".zed",
+    ".claude",
    "_test"
 )

@@ -121,21 +135,25 @@ $ROBOCOPY_ARGS = @(
    "/Z"      # restartable mode
 )

-if ($EXCLUDE_DIRS.Count -gt 0) {
+if ($EXCLUDE_DIRS.Count -gt 0)
+{
    $ROBOCOPY_ARGS += "/XD"
    $ROBOCOPY_ARGS += $EXCLUDE_DIRS
 }

-if ($EXCLUDE_FILES.Count -gt 0) {
+if ($EXCLUDE_FILES.Count -gt 0)
+{
    $ROBOCOPY_ARGS += "/XF"
    $ROBOCOPY_ARGS += $EXCLUDE_FILES
 }

-if ($DRY_RUN) {
+if ($DRY_RUN)
+{
    $ROBOCOPY_ARGS += "/L"   # list mode
 }

-if ($DELETE) {
+if ($DELETE)
+{
    $ROBOCOPY_ARGS += "/MIR"  # mirror
 }

--- a/deploy.sh
+++ b/deploy.sh
@@ -72,6 +72,8 @@ RSYNC_ARGS=(
  --exclude=_agent-data/
  --exclude=.github/
  --exclude=.vscode/
+  --exclude=.zed/
+  --exclude=.claude/
  --exclude=_test/
  --exclude=deleted.files
  --exclude=*.swp
--- a/dialog.css
+++ b/dialog.css
@@ -0,0 +1,62 @@
+/* ============================================================
+ * Dialog Infrastructure (shared overlay & popup)
+ * ============================================================ */
+.luxtools-dialog-overlay {
+    display: none;
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.4);
+    z-index: 10000;
+    justify-content: center;
+    align-items: center;
+}
+
+.luxtools-dialog {
+    background: @ini_background;
+    border: 1px solid @ini_border;
+    border-radius: 0.4em;
+    padding: 1.5em;
+    max-width: 500px;
+    width: 90%;
+    max-height: 80vh;
+    overflow-y: auto;
+    position: relative;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
+}
+
+.luxtools-dialog-close {
+    position: absolute;
+    top: 0.5em;
+    right: 0.75em;
+    background: none;
+    border: none;
+    font-size: 1.5em;
+    cursor: pointer;
+    color: @ini_text;
+    line-height: 1;
+}
+
+.luxtools-dialog-close:hover {
+    opacity: 0.7;
+}
+
+.luxtools-dialog-title {
+    margin: 0 0 0.75em 0;
+    padding-right: 1.5em;
+}
+
+.luxtools-dialog-field {
+    margin: 0.5em 0;
+}
+
+.luxtools-dialog-actions {
+    margin-top: 1em;
+    padding-top: 0.75em;
+    border-top: 1px solid @ini_border;
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.5em;
+}
--- a/js/calendar-widget.js
+++ b/js/calendar-widget.js
@@ -51,19 +51,33 @@

  function getCalendarStateKey(calendar) {
    var baseNs = calendar.getAttribute('data-base-ns') || 'chronological';
-    return 'luxtools.calendar.month.' + baseNs;
+    return 'luxtools_calendar_month_' + baseNs.replace(/[^a-zA-Z0-9]/g, '_');
  }

  function shouldPersistCalendarMonth(calendar) {
    return (calendar.getAttribute('data-luxtools-size') || 'large') === 'small';
  }

+  function getCookieValue(name) {
+    var match = document.cookie.match('(^|;)\\s*' + name.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + '\\s*=\\s*([^;]+)');
+    return match ? decodeURIComponent(match[2]) : null;
+  }
+
+  function setCookie(name, value) {
+    var date = new Date();
+    date.setFullYear(date.getFullYear() + 1);
+    document.cookie = name + '=' + encodeURIComponent(value) + '; expires=' + date.toUTCString() + '; path=/; SameSite=Lax';
+  }
+
+  function deleteCookie(name) {
+    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/; SameSite=Lax';
+  }
+
  function readSavedCalendarMonth(calendar) {
    if (!shouldPersistCalendarMonth(calendar)) return null;
-    if (!window.localStorage) return null;

    try {
-      var raw = window.localStorage.getItem(getCalendarStateKey(calendar));
+      var raw = getCookieValue(getCalendarStateKey(calendar));
      if (!raw) return null;

      var parsed = JSON.parse(raw);
@@ -79,31 +93,17 @@

  function saveCalendarMonth(calendar) {
    if (!shouldPersistCalendarMonth(calendar)) return;
-    if (!window.localStorage) return;

    var year = parseInt(calendar.getAttribute('data-current-year') || '', 10);
    var month = parseInt(calendar.getAttribute('data-current-month') || '', 10);
    if (!year || month < 1 || month > 12) return;

-    try {
-      window.localStorage.setItem(getCalendarStateKey(calendar), JSON.stringify({
-        year: year,
-        month: month
-      }));
-    } catch (e) {
-      // ignore storage failures
-    }
+    setCookie(getCalendarStateKey(calendar), JSON.stringify({ year: year, month: month }));
  }

  function clearSavedCalendarMonth(calendar) {
    if (!shouldPersistCalendarMonth(calendar)) return;
-    if (!window.localStorage) return;
-
-    try {
-      window.localStorage.removeItem(getCalendarStateKey(calendar));
-    } catch (e) {
-      // ignore storage failures
-    }
+    deleteCookie(getCalendarStateKey(calendar));
  }

  function fetchCalendarMonth(calendar, year, month) {
@@ -227,11 +227,22 @@

  function restoreCalendarMonth(calendar) {
    if (!shouldPersistCalendarMonth(calendar)) return;
-    var saved = readSavedCalendarMonth(calendar);
-    if (!saved) return;

    var year = parseInt(calendar.getAttribute('data-current-year') || '', 10);
    var month = parseInt(calendar.getAttribute('data-current-month') || '', 10);
+    if (!year || !month) return;
+
+    var saved = readSavedCalendarMonth(calendar);
+    if (!saved) {
+      var now = new Date();
+      var todayYear = now.getFullYear();
+      var todayMonth = now.getMonth() + 1;
+      if (year !== todayYear || month !== todayMonth) {
+        loadCalendarMonth(calendar, todayYear, todayMonth, false);
+      }
+      return;
+    }
+
    if (saved.year === year && saved.month === month) return;

    loadCalendarMonth(calendar, saved.year, saved.month, true);
@@ -258,7 +269,17 @@
    navigateCalendarMonth(calendar, direction, true);
  }

+  function updateClientDateCookie() {
+    var now = new Date();
+    setCookie('luxtools_client_month', JSON.stringify({
+      year: now.getFullYear(),
+      month: now.getMonth() + 1
+    }));
+  }
+
  function initCalendarWidgets() {
+    updateClientDateCookie();
+
    var calendars = document.querySelectorAll('div.luxtools-calendar[data-luxtools-calendar="1"]');
    for (var i = 0; i < calendars.length; i++) {
      syncCalendarToday(calendars[i]);
--- a/js/dialog.js
+++ b/js/dialog.js
@@ -0,0 +1,95 @@
+/* global window, document */
+
+/**
+ * Unified Dialog Infrastructure
+ *
+ * Provides a shared modal overlay and dialog container that all other
+ * client-side modules (event popups, cache purge, etc.) can use.
+ *
+ * Usage:
+ *   Luxtools.Dialog.show(htmlString)   – render content and open
+ *   Luxtools.Dialog.close()            – close the dialog
+ *   Luxtools.Dialog.getContainer()     – return the dialog DOM element
+ */
+(function () {
+  'use strict';
+
+  var Luxtools = window.Luxtools || (window.Luxtools = {});
+
+  var Dialog = (function () {
+    var overlay = null;
+    var container = null;
+
+    /**
+     * Lazily create the overlay + dialog container and attach them to
+     * the document body.  Wires up click-outside-to-close and Escape.
+     */
+    function ensureElements() {
+      if (overlay) return;
+
+      overlay = document.createElement('div');
+      overlay.className = 'luxtools-dialog-overlay';
+      overlay.style.display = 'none';
+
+      container = document.createElement('div');
+      container.className = 'luxtools-dialog';
+      container.setAttribute('role', 'dialog');
+      container.setAttribute('aria-modal', 'true');
+
+      overlay.appendChild(container);
+      document.body.appendChild(overlay);
+
+      // Close when clicking the backdrop (but not the dialog itself)
+      overlay.addEventListener('click', function (e) {
+        if (e.target === overlay) close();
+      });
+
+      // Close on Escape
+      document.addEventListener('keydown', function (e) {
+        if (e.key === 'Escape' && overlay && overlay.style.display !== 'none') {
+          close();
+        }
+      });
+    }
+
+    /**
+     * Show the dialog with the given HTML content.
+     *
+     * The HTML should include a close button with class
+     * `luxtools-dialog-close` – it will be wired up automatically.
+     *
+     * @param {string} html - innerHTML for the dialog container
+     */
+    function show(html) {
+      ensureElements();
+      container.innerHTML = html;
+      overlay.style.display = 'flex';
+
+      // Auto-wire the close button inside the rendered content
+      var closeBtn = container.querySelector('.luxtools-dialog-close');
+      if (closeBtn) closeBtn.addEventListener('click', close);
+    }
+
+    /**
+     * Close (hide) the dialog.
+     */
+    function close() {
+      if (overlay) overlay.style.display = 'none';
+    }
+
+    /**
+     * Return the dialog container element (creates it if necessary).
+     * Useful for querying form inputs after `show()`.
+     *
+     * @returns {HTMLElement}
+     */
+    function getContainer() {
+      ensureElements();
+      return container;
+    }
+
+    return { show: show, close: close, getContainer: getContainer };
+  })();
+
+  Luxtools.Dialog = Dialog;
+})();
--- a/js/event-popup.js
+++ b/js/event-popup.js
--- a/js/main.js
+++ b/js/main.js
@@ -1,7 +1,7 @@
 /* global window, document */

 (function () {
-  'use strict';
+  "use strict";

  var Luxtools = window.Luxtools || (window.Luxtools = {});
  var Lightbox = Luxtools.Lightbox;
@@ -16,7 +16,7 @@
  function findOpenElement(target) {
    var el = target;
    while (el && el !== document) {
-      if (el.classList && el.classList.contains('luxtools-open')) return el;
+      if (el.classList && el.classList.contains("luxtools-open")) return el;
      el = el.parentNode;
    }
    return null;
@@ -25,7 +25,8 @@
  function findGalleryItem(target) {
    var el = target;
    while (el && el !== document) {
-      if (el.classList && el.classList.contains('luxtools-gallery-item')) return el;
+      if (el.classList && el.classList.contains("luxtools-gallery-item"))
+        return el;
      el = el.parentNode;
    }
    return null;
@@ -35,7 +36,9 @@
    // Image gallery lightbox: intercept clicks so we don't navigate away.
    var galleryItem = findGalleryItem(event.target);
    if (galleryItem && Lightbox && Lightbox.open) {
-      var gallery = galleryItem.closest ? galleryItem.closest('div.luxtools-gallery[data-luxtools-gallery="1"]') : null;
+      var gallery = galleryItem.closest
+        ? galleryItem.closest('div.luxtools-gallery[data-luxtools-gallery="1"]')
+        : null;
      if (gallery) {
        event.preventDefault();
        Lightbox.open(gallery, galleryItem);
@@ -47,72 +50,59 @@
    if (!el) return;

    // {{open>...}} renders as a link; avoid jumping to '#'.
-    if (el.tagName && el.tagName.toLowerCase() === 'a') {
+    if (el.tagName && el.tagName.toLowerCase() === "a") {
      event.preventDefault();
    }

-    var raw = el.getAttribute('data-path') || '';
+    var raw = el.getAttribute("data-path") || "";
    if (!raw) return;
    if (!OpenService || !OpenService.openViaService) return;

    // Prefer local client service.
-    OpenService.openViaService(el, raw)
-      .catch(function (err) {
-        // If the browser blocks the request before it reaches localhost (mixed-content,
-        // extensions, stricter CORS handling), fall back to a no-CORS GET ping.
-        if (OpenService && OpenService.pingOpenViaImage) {
-          OpenService.pingOpenViaImage(el, raw);
-        }
+    OpenService.openViaService(el, raw).catch(function (err) {
+      // If the browser blocks the request before it reaches localhost (mixed-content,
+      // extensions, stricter CORS handling), fall back to a no-CORS GET ping.
+      if (OpenService && OpenService.pingOpenViaImage) {
+        OpenService.pingOpenViaImage(el, raw);
+      }

-        // Fallback to old behavior (often blocked in modern browsers).
-        var url = OpenService && OpenService.normalizeToFileUrl ? OpenService.normalizeToFileUrl(raw) : '';
-        if (!url) return;
-        console.warn('Local client service failed, falling back to file:// navigation:', err);
+      // Fallback to old behavior (often blocked in modern browsers).
+      var url =
+        OpenService && OpenService.normalizeToFileUrl
+          ? OpenService.normalizeToFileUrl(raw)
+          : "";
+      if (!url) return;
+      console.warn(
+        "Local client service failed, falling back to file:// navigation:",
+        err,
+      );
+      try {
+        window.open(url, "_blank", "noopener");
+      } catch (e) {
        try {
-          window.open(url, '_blank', 'noopener');
-        } catch (e) {
-          try {
-            window.location.href = url;
-          } catch (e2) {
-            console.error('Failed to open file URL:', e2);
-          }
+          window.location.href = url;
+        } catch (e2) {
+          console.error("Failed to open file URL:", e2);
        }
-      });
+      }
+    });
  }

  function initChronologicalEventTimes() {
-    var nodes = document.querySelectorAll('.luxtools-event-time[data-luxtools-start]');
+    var nodes = document.querySelectorAll(
+      ".luxtools-event-time[data-luxtools-start]",
+    );
    if (!nodes || nodes.length === 0) return;

-    var formatter;
-    try {
-      formatter = new Intl.DateTimeFormat('de-DE', {
-        hour: '2-digit',
-        minute: '2-digit',
-        hour12: false
-      });
-    } catch (e) {
-      formatter = null;
-    }
-
    for (var i = 0; i < nodes.length; i++) {
      var node = nodes[i];
-      var raw = node.getAttribute('data-luxtools-start') || '';
+      var raw = node.getAttribute("data-luxtools-start") || "";
      if (!raw) continue;

-      var date = new Date(raw);
-      if (isNaN(date.getTime())) continue;
+      var match = raw.match(/T(\d{2}):(\d{2})/);
+      if (!match) continue;

-      var label;
-      if (formatter) {
-        label = formatter.format(date);
-      } else {
-        var hh = String(date.getHours()).padStart(2, '0');
-        var mm = String(date.getMinutes()).padStart(2, '0');
-        label = hh + ':' + mm;
-      }
-
-      node.textContent = label;
+      node.textContent = match[1] + ":" + match[2];
    }
  }

@@ -120,71 +110,185 @@
  // Purge Cache Dialog
  // ============================================================
  function initPurgeCacheDialog() {
-    var $link = jQuery('a.luxtools-invalidate-cache');
-    if ($link.length === 0) return;
+    document.addEventListener(
+      "click",
+      function (e) {
+        var link = e.target.closest
+          ? e.target.closest("a.luxtools-invalidate-cache")
+          : null;
+        if (!link) return;

-    $link.on('click.luxtools', function (e) {
-      e.preventDefault();
+        e.preventDefault();

-      var href = $link.attr('href') || '';
-      var lang = (window.LANG && window.LANG.plugins && window.LANG.plugins.luxtools)
-        ? window.LANG.plugins.luxtools
-        : {};
+        var href = link.getAttribute("href") || "";
+        var lang =
+          window.LANG && window.LANG.plugins && window.LANG.plugins.luxtools
+            ? window.LANG.plugins.luxtools
+            : {};

-      var $dialog = jQuery(
-        '<div>' +
-        '<p>' + (lang.cache_purge_dialog_intro || 'The DokuWiki cache will always be purged. Optionally also purge the luxtools-specific caches:') + '</p>' +
-        '<p><label><input type="checkbox" id="luxtools-purge-pagelinks"> <strong>' + (lang.cache_purge_pagelinks_label || 'Pagelinks') + '</strong>' +
-        ' &ndash; ' + (lang.cache_purge_pagelinks_desc || 'Purges the pagelink mapping cache') + '</label></p>' +
-        '<p><label><input type="checkbox" id="luxtools-purge-thumbs"> <strong>' + (lang.cache_purge_thumbs_label || 'Thumbnails') + '</strong>' +
-        ' &ndash; ' + (lang.cache_purge_thumbs_desc || 'Purges all cached image thumbnails') + '</label></p>' +
-        '</div>'
-      );
+        var html = '<div class="luxtools-dialog-content">';
+        html +=
+          '<button type="button" class="luxtools-dialog-close" aria-label="Close">&times;</button>';
+        html +=
+          '<h3 class="luxtools-dialog-title">' +
+          (lang.cache_purge_dialog_title || "Purge Cache") +
+          "</h3>";
+        html +=
+          "<p>" +
+          (lang.cache_purge_dialog_intro ||
+            "The DokuWiki cache will always be purged. Optionally also purge the luxtools-specific caches:") +
+          "</p>";
+        html +=
+          '<p><label><input type="checkbox" id="luxtools-purge-pagelinks"> <strong>' +
+          (lang.cache_purge_pagelinks_label || "Pagelinks") +
+          "</strong>";
+        html +=
+          " &ndash; " +
+          (lang.cache_purge_pagelinks_desc ||
+            "Purges the pagelink mapping cache") +
+          "</label></p>";
+        html +=
+          '<p><label><input type="checkbox" id="luxtools-purge-thumbs"> <strong>' +
+          (lang.cache_purge_thumbs_label || "Thumbnails") +
+          "</strong>";
+        html +=
+          " &ndash; " +
+          (lang.cache_purge_thumbs_desc ||
+            "Purges all cached image thumbnails") +
+          "</label></p>";
+        html += '<div class="luxtools-dialog-actions">';
+        html +=
+          '<button type="button" class="button luxtools-purge-confirm">' +
+          (lang.cache_purge_confirm || "Purge Cache") +
+          "</button> ";
+        html +=
+          '<button type="button" class="button luxtools-purge-cancel">' +
+          (lang.cache_purge_cancel || "Cancel") +
+          "</button>";
+        html += "</div>";
+        html += "</div>";

-      $dialog.dialog({
-        title: lang.cache_purge_dialog_title || 'Purge Cache',
-        modal: true,
-        width: 420,
-        buttons: [
-          {
-            text: lang.cache_purge_cancel || 'Cancel',
-            click: function () { $dialog.dialog('close'); }
-          },
-          {
-            text: lang.cache_purge_confirm || 'Purge Cache',
-            click: function () {
-              var url = href;
-              if ($dialog.find('#luxtools-purge-pagelinks').prop('checked')) {
-                url += '&luxtools_purge_pagelinks=1';
-              }
-              if ($dialog.find('#luxtools-purge-thumbs').prop('checked')) {
-                url += '&luxtools_purge_thumbs=1';
-              }
-              $dialog.dialog('close');
-              window.location.href = url;
+        Luxtools.Dialog.show(html);
+
+        var container = Luxtools.Dialog.getContainer();
+
+        var cancelBtn = container.querySelector(".luxtools-purge-cancel");
+        if (cancelBtn) {
+          cancelBtn.addEventListener("click", function () {
+            Luxtools.Dialog.close();
+          });
+        }
+
+        var confirmBtn = container.querySelector(".luxtools-purge-confirm");
+        if (confirmBtn) {
+          confirmBtn.addEventListener("click", function () {
+            var url = href;
+            var plCheck = container.querySelector("#luxtools-purge-pagelinks");
+            var thCheck = container.querySelector("#luxtools-purge-thumbs");
+            if (plCheck && plCheck.checked) {
+              url += "&luxtools_purge_pagelinks=1";
+            }
+            if (thCheck && thCheck.checked) {
+              url += "&luxtools_purge_thumbs=1";
+            }
+            Luxtools.Dialog.close();
+            window.location.href = url;
+          });
+        }
+      },
+      false,
+    );
+  }
+
+  // ============================================================
+  // Calendar Sync Button (syntax widget)
+  // ============================================================
+  function initCalendarSyncButtons() {
+    document.addEventListener(
+      "click",
+      function (e) {
+        var btn = e.target;
+        if (
+          !btn ||
+          !btn.classList ||
+          !btn.classList.contains("luxtools-calendar-sync-btn")
+        )
+          return;
+
+        e.preventDefault();
+
+        var ajaxUrl = btn.getAttribute("data-luxtools-ajax-url") || "";
+        var sectok = btn.getAttribute("data-luxtools-sectok") || "";
+        if (!ajaxUrl) return;
+
+        var status = btn.parentNode
+          ? btn.parentNode.querySelector(".luxtools-calendar-sync-status")
+          : null;
+
+        btn.disabled = true;
+        if (status) {
+          status.textContent = "Syncing...";
+          status.style.color = "";
+        }
+
+        var xhr = new XMLHttpRequest();
+        xhr.open("POST", ajaxUrl, true);
+        xhr.setRequestHeader(
+          "Content-Type",
+          "application/x-www-form-urlencoded",
+        );
+        xhr.onload = function () {
+          btn.disabled = false;
+          try {
+            var r = JSON.parse(xhr.responseText);
+            if (status) {
+              status.textContent = r.message || (r.ok ? "Done" : "Failed");
+              status.style.color = r.ok ? "green" : "red";
+            }
+          } catch (ex) {
+            if (status) {
+              status.textContent = "Error";
+              status.style.color = "red";
            }
          }
-        ],
-        close: function () {
-          jQuery(this).dialog('destroy').remove();
-        }
-      });
-    });
+        };
+        xhr.onerror = function () {
+          btn.disabled = false;
+          if (status) {
+            status.textContent = "Network error";
+            status.style.color = "red";
+          }
+        };
+        xhr.send(
+          "call=luxtools_calendar_sync&sectok=" + encodeURIComponent(sectok),
+        );
+      },
+      false,
+    );
  }

  // ============================================================
  // Initialize
  // ============================================================
-  document.addEventListener('click', onClick, false);
-  document.addEventListener('DOMContentLoaded', function () {
-    if (GalleryThumbnails && GalleryThumbnails.init) GalleryThumbnails.init();
-    initChronologicalEventTimes();
-    if (CalendarWidget && CalendarWidget.init) CalendarWidget.init();
-    initPurgeCacheDialog();
-  }, false);
-  document.addEventListener('DOMContentLoaded', function () {
-    if (Scratchpads && Scratchpads.init) Scratchpads.init();
-  }, false);
+  document.addEventListener("click", onClick, false);
+  document.addEventListener(
+    "DOMContentLoaded",
+    function () {
+      if (GalleryThumbnails && GalleryThumbnails.init) GalleryThumbnails.init();
+      initChronologicalEventTimes();
+      if (CalendarWidget && CalendarWidget.init) CalendarWidget.init();
+      initPurgeCacheDialog();
+      initCalendarSyncButtons();
+    },
+    false,
+  );
+  document.addEventListener(
+    "DOMContentLoaded",
+    function () {
+      if (Scratchpads && Scratchpads.init) Scratchpads.init();
+    },
+    false,
+  );

  Luxtools.initChronologicalEventTimes = initChronologicalEventTimes;
 })();
--- a/lang/de/lang.php
+++ b/lang/de/lang.php
@@ -95,14 +95,6 @@ $lang["pagelink_unlinked"] = "Seite nicht verknüpft";
 $lang["pagelink_multi_warning"] = "Mehrere Ordner verknüpft";
 $lang["chronological_photos_title"] = "Fotos";
 $lang["chronological_events_title"] = "Termine";
-$lang["chronological_maintenance_title"] = "Aufgaben";
-$lang["maintenance_task_complete"] = "Erledigen";
-$lang["maintenance_task_reopen"] = "Wieder öffnen";
-$lang["maintenance_no_tasks"] = "Keine offenen Aufgaben.";
-$lang["maintenance_complete_success"] = "Aufgabe als erledigt markiert.";
-$lang["maintenance_complete_error"] = "Aktualisierung der Aufgabe fehlgeschlagen.";
-$lang["maintenance_reopen_success"] = "Aufgabe wieder geöffnet.";
-$lang["maintenance_remote_write_failed"] = "Lokale Aktualisierung erfolgreich, aber CalDAV-Update fehlgeschlagen. Wird bei nächster Synchronisierung erneut versucht.";
 $lang["calendar_sync_button"] = "Kalender synchronisieren";
 $lang["calendar_sync_success"] = "Kalender-Synchronisierung abgeschlossen.";
 $lang["calendar_sync_error"] = "Kalender-Synchronisierung fehlgeschlagen.";
@@ -131,3 +123,11 @@ $lang["movie_error_fetch"] = "OMDb-Abfrage fehlgeschlagen.";
 $lang["omdb_heading"] = "Film-Import (OMDb)";
 $lang["omdb_apikey"] = "OMDb-API-Schlüssel";
 $lang["omdb_apikey_note"] = "Der API-Schlüssel wird an den Browser übergeben für clientseitige OMDb-Abfragen. Er ist in den Browser-Entwicklertools und Netzwerkanfragen sichtbar.";
+
+$lang["event_create_success"] = "Termin erstellt.";
+$lang["event_create_error"] = "Termin konnte nicht erstellt werden.";
+$lang["event_edit_success"] = "Termin aktualisiert.";
+$lang["event_edit_error"] = "Termin konnte nicht aktualisiert werden.";
+$lang["event_delete_success"] = "Termin gelöscht.";
+$lang["event_delete_error"] = "Termin konnte nicht gelöscht werden.";
+$lang["event_caldav_push_failed"] = "Lokale Aktualisierung erfolgreich, aber CalDAV-Upload fehlgeschlagen.";
--- a/lang/en/lang.php
+++ b/lang/en/lang.php
@@ -96,14 +96,6 @@ $lang["pagelink_multi_warning"] = "Multiple folders linked";
 $lang["calendar_err_badmonth"] = "Invalid calendar month. Use YYYY-MM.";
 $lang["chronological_photos_title"] = "Photos";
 $lang["chronological_events_title"] = "Events";
-$lang["chronological_maintenance_title"] = "Tasks";
-$lang["maintenance_task_complete"] = "Complete";
-$lang["maintenance_task_reopen"] = "Reopen";
-$lang["maintenance_no_tasks"] = "No open tasks.";
-$lang["maintenance_complete_success"] = "Task marked as completed.";
-$lang["maintenance_complete_error"] = "Failed to update task.";
-$lang["maintenance_reopen_success"] = "Task reopened.";
-$lang["maintenance_remote_write_failed"] = "Local update succeeded, but remote CalDAV update failed. Will retry on next sync.";
 $lang["calendar_sync_button"] = "Sync Calendars";
 $lang["calendar_sync_success"] = "Calendar sync completed.";
 $lang["calendar_sync_error"] = "Calendar sync failed.";
@@ -132,3 +124,11 @@ $lang["movie_error_fetch"] = "OMDb lookup failed.";
 $lang["omdb_heading"] = "Movie Import (OMDb)";
 $lang["omdb_apikey"] = "OMDb API key";
 $lang["omdb_apikey_note"] = "The API key is passed to the browser for client-side OMDb lookups. It will be visible in browser developer tools and network requests.";
+
+$lang["event_create_success"] = "Event created.";
+$lang["event_create_error"] = "Failed to create event.";
+$lang["event_edit_success"] = "Event updated.";
+$lang["event_edit_error"] = "Failed to update event.";
+$lang["event_delete_success"] = "Event deleted.";
+$lang["event_delete_error"] = "Failed to delete event.";
+$lang["event_caldav_push_failed"] = "Local update succeeded, but CalDAV upload failed.";
--- a/src/CalDavClient.php
+++ b/src/CalDavClient.php
@@ -395,6 +395,68 @@ class CalDavClient
        }
    }

+    /**
+     * Public wrapper for findObjectByUid.
+     *
+     * @param string $caldavUrl
+     * @param string $username
+     * @param string $password
+     * @param string $uid
+     * @return array{href: string, etag: string, data: string}|null
+     */
+    public static function findObjectByUidPublic(
+        string $caldavUrl,
+        string $username,
+        string $password,
+        string $uid
+    ): ?array {
+        return self::findObjectByUid($caldavUrl, $username, $password, $uid);
+    }
+
+    /**
+     * Public wrapper for putCalendarObject.
+     *
+     * @param string $href
+     * @param string $username
+     * @param string $password
+     * @param string $data
+     * @param string $etag
+     * @return string Empty string on success, error on failure
+     */
+    public static function putCalendarObjectPublic(
+        string $href,
+        string $username,
+        string $password,
+        string $data,
+        string $etag
+    ): string {
+        return self::putCalendarObject($href, $username, $password, $data, $etag);
+    }
+
+    /**
+     * Delete a calendar object from the server.
+     *
+     * @param string $href     Full URL of the calendar object
+     * @param string $username
+     * @param string $password
+     * @param string $etag     ETag for If-Match header (empty to skip)
+     * @return bool  True on success
+     */
+    public static function deleteCalendarObject(
+        string $href,
+        string $username,
+        string $password,
+        string $etag
+    ): bool {
+        $headers = [];
+        if ($etag !== '') {
+            $headers[] = 'If-Match: ' . $etag;
+        }
+
+        $response = self::request('DELETE', $href, $username, $password, '', $headers);
+        return $response !== null;
+    }
+
    /**
     * Perform an HTTP request to a CalDAV server.
     *
--- a/src/CalendarEvent.php
+++ b/src/CalendarEvent.php
@@ -10,7 +10,7 @@ namespace dokuwiki\plugin\luxtools;
 */
 class CalendarEvent
 {
-    /** @var string Calendar slot key (e.g. 'general', 'maintenance') */
+    /** @var string Calendar slot key (e.g. 'general', 'slot2') */
    public $slotKey;

    /** @var string Unique source event UID */
@@ -52,35 +52,4 @@ class CalendarEvent

    /** @var string The date (YYYY-MM-DD) this event applies to */
    public $dateIso;
-
-    /**
-     * Build a stable completion key for maintenance task tracking.
-     *
-     * @return string
-     */
-    public function completionKey(): string
-    {
-        return implode('|', [$this->slotKey, $this->uid, $this->dateIso]);
-    }
-
-    /**
-     * Whether this event/task is marked as completed.
-     *
-     * @return bool
-     */
-    public function isCompleted(): bool
-    {
-        $s = strtoupper($this->status);
-        return $s === 'COMPLETED';
-    }
-
-    /**
-     * Whether this event/task is open (for maintenance filtering).
-     *
-     * @return bool
-     */
-    public function isOpen(): bool
-    {
-        return !$this->isCompleted();
-    }
 }
--- a/src/CalendarService.php
+++ b/src/CalendarService.php
@@ -14,17 +14,13 @@ use Throwable;
 /**
 * Slot-aware calendar service.
 *
- * Provides normalized event data grouped by slot for rendering,
- * widget indicators, task list queries, and completion tracking.
+ * Provides normalized event data grouped by slot for rendering and widget indicators.
 */
 class CalendarService
 {
    /** @var array<string,CalendarEvent[]> In-request cache keyed by "slotKey|dateIso" */
    protected static $dayCache = [];

-    /** @var array<string,CalendarEvent[]> In-request cache keyed by "slotKey|all" for open tasks */
-    protected static $taskCache = [];
-
    /** @var array<string,VCalendar|null> In-request cache keyed by file path */
    protected static $vcalCache = [];

@@ -111,81 +107,6 @@ class CalendarService
        return self::slotEventsForDate($slot, $dateIso) !== [];
    }

-    /**
-     * Get all open maintenance tasks due up to (and including) today.
-     *
-     * @param CalendarSlot $maintenanceSlot
-     * @param string $todayIso YYYY-MM-DD
-     * @param int $pastDays Maximum number of overdue days to include
-     * @return CalendarEvent[] Sorted: overdue first, then today, then by title
-     */
-    public static function openMaintenanceTasks(CalendarSlot $maintenanceSlot, string $todayIso, int $pastDays = 30): array
-    {
-        if (!$maintenanceSlot->isEnabled()) return [];
-        if (!ChronoID::isIsoDate($todayIso)) return [];
-
-        $pastDays = max(0, $pastDays);
-
-        $file = $maintenanceSlot->getFile();
-        if ($file === '' || !is_file($file) || !is_readable($file)) return [];
-
-        $cacheKey = $maintenanceSlot->getKey() . '|tasks|' . $todayIso . '|' . $pastDays;
-        if (isset(self::$taskCache[$cacheKey])) {
-            return self::$taskCache[$cacheKey];
-        }
-
-        $tasks = self::parseAllTasksFromFile($file, $maintenanceSlot->getKey(), $todayIso);
-        $oldestOpenDateIso = self::oldestOpenTaskDate($todayIso, $pastDays);
-
-        // Filter: only non-completed, due today or earlier, and not older than the configured overdue window.
-        $open = [];
-        foreach ($tasks as $task) {
-            if ($task->isCompleted()) continue;
-            if ($task->dateIso > $todayIso) continue;
-            if ($task->dateIso < $oldestOpenDateIso) continue;
-            $open[] = $task;
-        }
-
-        // Sort: overdue first, then today, then by time, then by title
-        usort($open, static function (CalendarEvent $a, CalendarEvent $b) use ($todayIso): int {
-            $aOverdue = $a->dateIso < $todayIso;
-            $bOverdue = $b->dateIso < $todayIso;
-            if ($aOverdue !== $bOverdue) {
-                return $aOverdue ? -1 : 1;
-            }
-            $dateCmp = strcmp($a->dateIso, $b->dateIso);
-            if ($dateCmp !== 0) return $dateCmp;
-
-            $timeCmp = strcmp($a->time, $b->time);
-            if ($timeCmp !== 0) return $timeCmp;
-
-            return strcmp($a->summary, $b->summary);
-        });
-
-        self::$taskCache[$cacheKey] = $open;
-        return $open;
-    }
-
-    /**
-     * @param string $todayIso
-     * @param int $pastDays
-     * @return string
-     */
-    protected static function oldestOpenTaskDate(string $todayIso, int $pastDays): string
-    {
-        try {
-            $today = new DateTimeImmutable($todayIso . ' 00:00:00', new DateTimeZone('UTC'));
-        } catch (Throwable $e) {
-            return $todayIso;
-        }
-
-        if ($pastDays === 0) {
-            return $today->format('Y-m-d');
-        }
-
-        return $today->sub(new DateInterval('P' . $pastDays . 'D'))->format('Y-m-d');
-    }
-
    /**
     * Get slot-level day indicator data for a whole month.
     *
@@ -217,12 +138,13 @@ class CalendarService
            if ($calendar === null) continue;

            try {
+                $uidTimezones = self::buildUidTimezoneMap($calendar);
                $expanded = $calendar->expand($rangeStart, $rangeEnd);
                if (!($expanded instanceof VCalendar)) continue;

                for ($day = 1; $day <= $daysInMonth; $day++) {
                    $dateIso = sprintf('%04d-%02d-%02d', $year, $month, $day);
-                    $events = self::collectFromCalendar($expanded, $slot->getKey(), $dateIso);
+                    $events = self::collectFromCalendar($expanded, $slot->getKey(), $dateIso, $uidTimezones);
                    $cacheKey = $slot->getKey() . '|' . $dateIso;
                    self::$dayCache[$cacheKey] = $events;

@@ -301,6 +223,28 @@ class CalendarService
        }
    }

+    /**
+     * Build a UID → TZID map from the original (non-expanded) calendar.
+     *
+     * VCalendar::expand() normalizes all timezone-aware datetimes to UTC, losing
+     * the original TZID. This map lets us restore the correct timezone afterwards.
+     *
+     * @param VCalendar $calendar
+     * @return array<string,string> uid => tzid
+     */
+    protected static function buildUidTimezoneMap(VCalendar $calendar): array
+    {
+        $map = [];
+        foreach ($calendar->select('VEVENT') as $vevent) {
+            if (!isset($vevent->DTSTART)) continue;
+            $uid = trim((string)($vevent->UID ?? ''));
+            if ($uid === '' || isset($map[$uid])) continue;
+            $tzid = (string)($vevent->DTSTART['TZID'] ?? '');
+            if ($tzid !== '') $map[$uid] = $tzid;
+        }
+        return $map;
+    }
+
    /**
     * Parse events from a local ICS file for a specific date.
     *
@@ -315,6 +259,8 @@ class CalendarService
        if ($calendar === null) return [];

        try {
+            $uidTimezones = self::buildUidTimezoneMap($calendar);
+
            $utc = new DateTimeZone('UTC');
            $rangeStart = new DateTimeImmutable($dateIso . ' 00:00:00', $utc);
            $rangeStart = $rangeStart->sub(new DateInterval('P1D'));
@@ -323,50 +269,7 @@ class CalendarService
            $expanded = $calendar->expand($rangeStart, $rangeEnd);
            if (!($expanded instanceof VCalendar)) return [];

-            return self::collectFromCalendar($expanded, $slotKey, $dateIso);
-        } catch (Throwable $e) {
-            return [];
-        }
-    }
-
-    /**
-     * Parse all tasks (VEVENT with STATUS) from a maintenance file,
-     * expanding recurrences up to the given date.
-     *
-     * @param string $file
-     * @param string $slotKey
-     * @param string $todayIso
-     * @return CalendarEvent[]
-     */
-    protected static function parseAllTasksFromFile(string $file, string $slotKey, string $todayIso): array
-    {
-        $calendar = self::readCalendar($file);
-        if ($calendar === null) return [];
-
-        try {
-            $component = $calendar;
-
-            // Expand from a reasonable lookback to tomorrow
-            $utc = new DateTimeZone('UTC');
-            $rangeStart = new DateTimeImmutable('2020-01-01 00:00:00', $utc);
-            $rangeEnd = new DateTimeImmutable($todayIso . ' 00:00:00', $utc);
-            $rangeEnd = $rangeEnd->add(new DateInterval('P1D'));
-
-            $expanded = $component->expand($rangeStart, $rangeEnd);
-            if (!($expanded instanceof VCalendar)) return [];
-
-            $tasks = [];
-
-            // Collect VEVENTs
-            foreach ($expanded->select('VEVENT') as $vevent) {
-                if (!($vevent instanceof VEvent)) continue;
-                $event = self::normalizeVEvent($vevent, $slotKey);
-                if ($event !== null) {
-                    $tasks[] = $event;
-                }
-            }
-
-            return $tasks;
+            return self::collectFromCalendar($expanded, $slotKey, $dateIso, $uidTimezones);
        } catch (Throwable $e) {
            return [];
        }
@@ -378,9 +281,10 @@ class CalendarService
     * @param VCalendar $calendar
     * @param string $slotKey
     * @param string $dateIso
+     * @param array<string,string> $uidTimezones uid => tzid, for restoring timezone after expand()
     * @return CalendarEvent[]
     */
-    protected static function collectFromCalendar(VCalendar $calendar, string $slotKey, string $dateIso): array
+    protected static function collectFromCalendar(VCalendar $calendar, string $slotKey, string $dateIso, array $uidTimezones = []): array
    {
        $result = [];
        $seen = [];
@@ -388,7 +292,7 @@ class CalendarService
        // VEVENTs
        foreach ($calendar->select('VEVENT') as $vevent) {
            if (!($vevent instanceof VEvent)) continue;
-            $event = self::normalizeVEventForDay($vevent, $slotKey, $dateIso);
+            $event = self::normalizeVEventForDay($vevent, $slotKey, $dateIso, $uidTimezones);
            if ($event === null) continue;

            $dedupeKey = $event->uid . '|' . $event->recurrenceId . '|' . $event->startIso . '|' . $event->summary;
@@ -407,9 +311,10 @@ class CalendarService
     * @param VEvent $vevent
     * @param string $slotKey
     * @param string $dateIso
+     * @param array<string,string> $uidTimezones uid => tzid, for restoring timezone after expand()
     * @return CalendarEvent|null
     */
-    protected static function normalizeVEventForDay(VEvent $vevent, string $slotKey, string $dateIso): ?CalendarEvent
+    protected static function normalizeVEventForDay(VEvent $vevent, string $slotKey, string $dateIso, array $uidTimezones = []): ?CalendarEvent
    {
        if (!isset($vevent->DTSTART)) return null;

@@ -417,8 +322,30 @@ class CalendarService
        $start = self::toImmutable($vevent->DTSTART->getDateTime());
        if ($start === null) return null;

+        // VCalendar::expand() normalizes all timezone-aware datetimes to UTC, losing
+        // the original TZID. Restore it using the pre-expansion UID→TZID map so that
+        // display times and day-boundary checks use the event's original timezone.
+        $restoredTz = null;
+        if (!$isAllDay && $uidTimezones !== [] && $start->getTimezone()->getName() === 'UTC') {
+            $uid = trim((string)($vevent->UID ?? ''));
+            $tzid = $uidTimezones[$uid] ?? '';
+            if ($tzid !== '') {
+                try {
+                    $restoredTz = new DateTimeZone($tzid);
+                    $start = $start->setTimezone($restoredTz);
+                } catch (Throwable $e) {
+                    $restoredTz = null;
+                }
+            }
+        }
+
        $end = self::resolveEnd($vevent, $start, $isAllDay);

+        // Apply the same timezone restoration to the end datetime.
+        if ($restoredTz !== null && $end->getTimezone()->getName() === 'UTC') {
+            $end = $end->setTimezone($restoredTz);
+        }
+
        if (!self::intersectsDay($start, $end, $isAllDay, $dateIso)) return null;

        $event = new CalendarEvent();
@@ -440,42 +367,6 @@ class CalendarService
        return $event;
    }

-    /**
-     * Normalize a VEVENT into a CalendarEvent (without day filtering).
-     *
-     * @param VEvent $vevent
-     * @param string $slotKey
-     * @return CalendarEvent|null
-     */
-    protected static function normalizeVEvent(VEvent $vevent, string $slotKey): ?CalendarEvent
-    {
-        if (!isset($vevent->DTSTART)) return null;
-
-        $isAllDay = strtoupper((string)($vevent->DTSTART['VALUE'] ?? '')) === 'DATE';
-        $start = self::toImmutable($vevent->DTSTART->getDateTime());
-        if ($start === null) return null;
-
-        $end = self::resolveEnd($vevent, $start, $isAllDay);
-
-        $event = new CalendarEvent();
-        $event->slotKey = $slotKey;
-        $event->uid = trim((string)($vevent->UID ?? ''));
-        $event->recurrenceId = isset($vevent->{'RECURRENCE-ID'}) ? trim((string)$vevent->{'RECURRENCE-ID'}) : '';
-        $event->summary = trim((string)($vevent->SUMMARY ?? ''));
-        if ($event->summary === '') $event->summary = '(ohne Titel)';
-        $event->startIso = $start->format(DateTimeInterface::ATOM);
-        $event->endIso = $end->format(DateTimeInterface::ATOM);
-        $event->allDay = $isAllDay;
-        $event->time = $isAllDay ? '' : $start->format('H:i');
-        $event->location = trim((string)($vevent->LOCATION ?? ''));
-        $event->description = trim((string)($vevent->DESCRIPTION ?? ''));
-        $event->status = strtoupper(trim((string)($vevent->STATUS ?? '')));
-        $event->componentType = 'VEVENT';
-        $event->dateIso = $start->format('Y-m-d');
-
-        return $event;
-    }
-
    /**
     * Resolve the end date/time for a VEVENT.
     *
@@ -573,7 +464,6 @@ class CalendarService
    public static function clearCache(): void
    {
        self::$dayCache = [];
-        self::$taskCache = [];
        self::$vcalCache = [];
    }
 }
--- a/src/CalendarSlot.php
+++ b/src/CalendarSlot.php
@@ -12,17 +12,17 @@ namespace dokuwiki\plugin\luxtools;
 class CalendarSlot
 {
    /** @var string[] Ordered list of all supported slot keys */
-    public const SLOT_KEYS = ['general', 'maintenance', 'slot3', 'slot4'];
+    public const SLOT_KEYS = ['general', 'slot2', 'slot3', 'slot4'];

     /** @var string[] Allowed widget indicator display positions */
     public const INDICATOR_DISPLAYS = ['none', 'top-left', 'top-right', 'bottom-left', 'bottom-right'];

    /** @var array<string,string> Human-readable labels for slot keys */
    public const SLOT_LABELS = [
-        'general'     => 'General',
-        'maintenance' => 'Maintenance',
-        'slot3'       => 'Slot 3',
-        'slot4'       => 'Slot 4',
+        'general' => 'General',
+        'slot2'   => 'Slot 2',
+        'slot3'   => 'Slot 3',
+        'slot4'   => 'Slot 4',
    ];

    /** @var string */
--- a/src/CalendarSyncService.php
+++ b/src/CalendarSyncService.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Centralized calendar sync service.
+ *
+ * Extracts sync logic from action.php so it can be reused
+ * by the admin page, the calendar_sync syntax, and future
+ * CLI entry points without duplicating code.
+ */
+class CalendarSyncService
+{
+    /**
+     * Run a full sync for all enabled slots that have a remote source.
+     *
+     * @param CalendarSlot[] $slots Keyed by slot key
+     * @return array{ok: bool, message: string, results: array<string,bool>}
+     */
+    public static function syncAll(array $slots): array
+    {
+        $results = [];
+        $hasErrors = false;
+
+        foreach ($slots as $slot) {
+            if (!$slot->hasRemoteSource()) continue;
+
+            $ok = CalDavClient::syncSlot($slot);
+            $results[$slot->getKey()] = $ok;
+            if (!$ok) $hasErrors = true;
+        }
+
+        CalendarService::clearCache();
+
+        return [
+            'ok' => !$hasErrors,
+            'results' => $results,
+        ];
+    }
+}
--- a/src/ChronologicalCalendarWidget.php
+++ b/src/ChronologicalCalendarWidget.php
@@ -132,7 +132,13 @@ class ChronologicalCalendarWidget
                    $classes .= ' luxtools-calendar-day-has-events';
                }

-                $html .= '<td class="' . hsc($classes) . '" data-luxtools-date="' . hsc($date) . '">';
+                // Encode day event data as JSON for the day popup
+                $dayEventsJson = self::encodeDayEventsJson($events);
+                $dayDataAttr = $dayEventsJson !== '[]'
+                    ? ' data-luxtools-day-events="' . hsc($dayEventsJson) . '"'
+                    : '';
+
+                $html .= '<td class="' . hsc($classes) . '" data-luxtools-date="' . hsc($date) . '" data-luxtools-day="1"' . $dayDataAttr . '>';

                if ($size === 'small') {
                    $dayIndicators = $indicators[$date] ?? [];
@@ -277,7 +283,47 @@ class ChronologicalCalendarWidget
        }
        $attrs .= ' data-event-allday="' . ($event->allDay ? '1' : '0') . '"';
        $attrs .= ' data-event-slot="' . hsc($event->slotKey) . '"';
+        if ($event->uid !== '') {
+            $attrs .= ' data-event-uid="' . hsc($event->uid) . '"';
+        }
+        if ($event->recurrenceId !== '') {
+            $attrs .= ' data-event-recurrence="' . hsc($event->recurrenceId) . '"';
+        }
+        if ($event->dateIso !== '') {
+            $attrs .= ' data-event-date="' . hsc($event->dateIso) . '"';
+        }

        return $attrs;
    }
+
+    /**
+     * Encode day events as a JSON array for the day popup.
+     *
+     * @param CalendarEvent[] $events
+     * @return string JSON string
+     */
+    protected static function encodeDayEventsJson(array $events): string
+    {
+        if ($events === []) return '[]';
+
+        $items = [];
+        foreach ($events as $event) {
+            $item = [
+                'summary' => $event->summary,
+                'start' => $event->startIso,
+                'allDay' => $event->allDay,
+                'slot' => $event->slotKey,
+            ];
+            if ($event->endIso !== '') $item['end'] = $event->endIso;
+            if ($event->location !== '') $item['location'] = $event->location;
+            if ($event->description !== '') $item['description'] = $event->description;
+            if ($event->time !== '') $item['time'] = $event->time;
+            if ($event->uid !== '') $item['uid'] = $event->uid;
+            if ($event->recurrenceId !== '') $item['recurrence'] = $event->recurrenceId;
+            if ($event->dateIso !== '') $item['date'] = $event->dateIso;
+            $items[] = $item;
+        }
+
+        return json_encode($items, JSON_UNESCAPED_UNICODE | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_QUOT);
+    }
 }
--- a/src/IcsWriter.php
+++ b/src/IcsWriter.php
@@ -265,6 +265,459 @@ class IcsWriter
        return self::atomicWrite($filePath, $content);
    }

+    /**
+     * Create a new event in a local ICS file.
+     *
+     * @param string $filePath
+     * @param array{summary:string,date:string,allDay:bool,startTime:string,endTime:string,location:string,description:string} $eventData
+     * @return string The UID of the created event, or empty string on failure
+     */
+    public static function createEvent(string $filePath, array $eventData): string
+    {
+        if ($filePath === '') return '';
+
+        try {
+            $calendar = null;
+            if (is_file($filePath) && is_readable($filePath)) {
+                $raw = @file_get_contents($filePath);
+                if (is_string($raw) && trim($raw) !== '') {
+                    $calendar = Reader::read($raw, Reader::OPTION_FORGIVING);
+                    if (!($calendar instanceof VCalendar)) {
+                        $calendar = null;
+                    }
+                }
+            }
+
+            if ($calendar === null) {
+                $calendar = new VCalendar();
+                $calendar->PRODID = '-//LuxTools DokuWiki Plugin//EN';
+            }
+
+            $uid = self::generateUid();
+            $props = [
+                'UID' => $uid,
+                'SUMMARY' => $eventData['summary'] ?? '',
+                'DTSTAMP' => gmdate('Ymd\THis\Z'),
+            ];
+
+            if (!empty($eventData['location'])) {
+                $props['LOCATION'] = $eventData['location'];
+            }
+            if (!empty($eventData['description'])) {
+                $props['DESCRIPTION'] = $eventData['description'];
+            }
+
+            $dateIso = $eventData['date'] ?? '';
+            $allDay = !empty($eventData['allDay']);
+
+            if ($allDay) {
+                $props['DTSTART'] = str_replace('-', '', $dateIso);
+                $vevent = $calendar->add('VEVENT', $props);
+                $vevent->DTSTART['VALUE'] = 'DATE';
+            } else {
+                $startTime = $eventData['startTime'] ?? '00:00';
+                $endTime = $eventData['endTime'] ?? '';
+                $props['DTSTART'] = str_replace('-', '', $dateIso) . 'T' . str_replace(':', '', $startTime) . '00';
+                $vevent = $calendar->add('VEVENT', $props);
+                if ($endTime !== '') {
+                    $vevent->add('DTEND', str_replace('-', '', $dateIso) . 'T' . str_replace(':', '', $endTime) . '00');
+                }
+            }
+
+            $output = $calendar->serialize();
+            if (!self::atomicWritePublic($filePath, $output)) {
+                return '';
+            }
+
+            return $uid;
+        } catch (Throwable $e) {
+            return '';
+        }
+    }
+
+    /**
+     * Edit an existing event in a local ICS file.
+     *
+     * Scope controls how recurring event edits are applied:
+     * - 'all': modify the master event directly
+     * - 'this': create/update an occurrence override
+     * - 'future': truncate the master's RRULE before this date and create a new series
+     *
+     * @param string $filePath
+     * @param string $uid
+     * @param string $recurrenceId
+     * @param array{summary:string,date:string,allDay:bool,startTime:string,endTime:string,location:string,description:string} $eventData
+     * @param string $scope 'all', 'this', or 'future'
+     * @return bool
+     */
+    public static function editEvent(string $filePath, string $uid, string $recurrenceId, array $eventData, string $scope = 'all'): bool
+    {
+        if ($filePath === '' || $uid === '') return false;
+        if (!is_file($filePath) || !is_writable($filePath)) return false;
+
+        $raw = @file_get_contents($filePath);
+        if (!is_string($raw) || trim($raw) === '') return false;
+
+        try {
+            $calendar = Reader::read($raw, Reader::OPTION_FORGIVING);
+            if (!($calendar instanceof VCalendar)) return false;
+
+            $dateIso = $eventData['date'] ?? '';
+            $allDay = !empty($eventData['allDay']);
+
+            if ($scope === 'future' && $recurrenceId !== '') {
+                // "This and future": truncate master RRULE, then create a new standalone event
+                $edited = self::editFutureOccurrences($calendar, $uid, $dateIso, $eventData);
+                if (!$edited) return false;
+            } elseif ($scope === 'all') {
+                // "All occurrences": find and edit the master event directly
+                $master = self::findMasterByUid($calendar, $uid);
+                if ($master === null) return false;
+                self::applyEventData($master, $eventData);
+            } else {
+                // "This occurrence" (or non-recurring): find/create occurrence override
+                $target = null;
+
+                // Find matching component
+                foreach ($calendar->select('VEVENT') as $component) {
+                    if (!($component instanceof VEvent)) continue;
+                    if (self::matchesComponent($component, $uid, $recurrenceId, $dateIso)) {
+                        $target = $component;
+                        break;
+                    }
+                }
+
+                // For recurring events without an existing override, create one
+                if ($target === null && $recurrenceId !== '') {
+                    $target = self::createEditOccurrenceOverride($calendar, $uid, $recurrenceId, $dateIso, $eventData);
+                }
+
+                if ($target === null) return false;
+                self::applyEventData($target, $eventData);
+            }
+
+            $output = $calendar->serialize();
+            return self::atomicWrite($filePath, $output);
+        } catch (Throwable $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Find the master VEVENT (the one with RRULE or without RECURRENCE-ID) by UID.
+     */
+    private static function findMasterByUid(VCalendar $calendar, string $uid): ?VEvent
+    {
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            $componentUid = trim((string)($component->UID ?? ''));
+            if ($componentUid !== $uid) continue;
+            // Master = has no RECURRENCE-ID
+            if (!isset($component->{'RECURRENCE-ID'})) {
+                return $component;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Create an occurrence override VEVENT for a recurring event.
+     */
+    private static function createEditOccurrenceOverride(VCalendar $calendar, string $uid, string $recurrenceId, string $dateIso, array $eventData): ?VEvent
+    {
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            $componentUid = trim((string)($component->UID ?? ''));
+            if ($componentUid !== $uid) continue;
+            if (!isset($component->RRULE)) continue;
+
+            $overrideProps = [
+                'UID' => $uid,
+                'SUMMARY' => $eventData['summary'] ?? '',
+            ];
+
+            $isAllDayMaster = strtoupper((string)($component->DTSTART['VALUE'] ?? '')) === 'DATE';
+            if ($isAllDayMaster) {
+                $recurrenceValue = str_replace('-', '', $dateIso);
+                $overrideProps['RECURRENCE-ID'] = $recurrenceValue;
+            } else {
+                $masterStart = $component->DTSTART->getDateTime();
+                $recurrenceValue = $dateIso . 'T' . $masterStart->format('His');
+                $tz = $masterStart->getTimezone();
+                if ($tz && $tz->getName() !== 'UTC') {
+                    $overrideProps['RECURRENCE-ID'] = str_replace('-', '', $recurrenceValue);
+                } else {
+                    $overrideProps['RECURRENCE-ID'] = str_replace('-', '', $recurrenceValue) . 'Z';
+                }
+            }
+
+            $target = $calendar->add('VEVENT', $overrideProps);
+            if ($isAllDayMaster) {
+                $target->{'RECURRENCE-ID'}['VALUE'] = 'DATE';
+            } else {
+                $masterStart = $component->DTSTART->getDateTime();
+                $tz = $masterStart->getTimezone();
+                if ($tz && $tz->getName() !== 'UTC') {
+                    $target->{'RECURRENCE-ID'}['TZID'] = $tz->getName();
+                }
+            }
+            return $target;
+        }
+        return null;
+    }
+
+    /**
+     * Apply event data to a VEVENT component (shared by all edit scopes).
+     */
+    private static function applyEventData(VEvent $target, array $eventData): void
+    {
+        $dateIso = $eventData['date'] ?? '';
+        $allDay = !empty($eventData['allDay']);
+
+        $target->SUMMARY = $eventData['summary'] ?? '';
+
+        if ($allDay) {
+            $target->DTSTART = str_replace('-', '', $dateIso);
+            $target->DTSTART['VALUE'] = 'DATE';
+            unset($target->DTEND);
+        } else {
+            $startTime = $eventData['startTime'] ?? '00:00';
+            $endTime = $eventData['endTime'] ?? '';
+            $target->DTSTART = str_replace('-', '', $dateIso) . 'T' . str_replace(':', '', $startTime) . '00';
+            if ($endTime !== '') {
+                if (isset($target->DTEND)) {
+                    $target->DTEND = str_replace('-', '', $dateIso) . 'T' . str_replace(':', '', $endTime) . '00';
+                } else {
+                    $target->add('DTEND', str_replace('-', '', $dateIso) . 'T' . str_replace(':', '', $endTime) . '00');
+                }
+            }
+        }
+
+        if (!empty($eventData['location'])) {
+            $target->LOCATION = $eventData['location'];
+        } else {
+            unset($target->LOCATION);
+        }
+
+        if (!empty($eventData['description'])) {
+            $target->DESCRIPTION = $eventData['description'];
+        } else {
+            unset($target->DESCRIPTION);
+        }
+    }
+
+    /**
+     * Handle "this and future" edits: truncate master RRULE before dateIso,
+     * then create a new standalone event with the edited data.
+     */
+    private static function editFutureOccurrences(VCalendar $calendar, string $uid, string $dateIso, array $eventData): bool
+    {
+        $master = self::findMasterByUid($calendar, $uid);
+        if ($master === null) return false;
+
+        // Truncate master RRULE to end before this date
+        self::deleteFutureOccurrences($calendar, $uid, $dateIso);
+
+        // Create a new standalone event with the edited data and a new UID
+        $newProps = [
+            'UID' => self::generateUid(),
+            'SUMMARY' => $eventData['summary'] ?? '',
+            'DTSTAMP' => gmdate('Ymd\THis\Z'),
+        ];
+        $newEvent = $calendar->add('VEVENT', $newProps);
+        self::applyEventData($newEvent, $eventData);
+
+        return true;
+    }
+
+    /**
+     * Delete an event from a local ICS file.
+     *
+     * @param string $filePath
+     * @param string $uid
+     * @param string $recurrenceId
+     * @param string $dateIso
+     * @param string $scope 'all', 'this', or 'future'
+     * @return bool
+     */
+    public static function deleteEvent(string $filePath, string $uid, string $recurrenceId, string $dateIso, string $scope = 'all'): bool
+    {
+        if ($filePath === '' || $uid === '') return false;
+        if (!is_file($filePath) || !is_writable($filePath)) return false;
+
+        $raw = @file_get_contents($filePath);
+        if (!is_string($raw) || trim($raw) === '') return false;
+
+        try {
+            $calendar = Reader::read($raw, Reader::OPTION_FORGIVING);
+            if (!($calendar instanceof VCalendar)) return false;
+
+            if ($scope === 'all') {
+                // Remove all components with this UID
+                self::removeComponentsByUid($calendar, $uid);
+            } elseif ($scope === 'this') {
+                // For a single occurrence, add EXDATE to master or remove the override
+                self::deleteOccurrence($calendar, $uid, $recurrenceId, $dateIso);
+            } elseif ($scope === 'future') {
+                // Modify RRULE UNTIL on the master
+                self::deleteFutureOccurrences($calendar, $uid, $dateIso);
+            } else {
+                return false;
+            }
+
+            $output = $calendar->serialize();
+            return self::atomicWrite($filePath, $output);
+        } catch (Throwable $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Remove all VEVENT components with a given UID.
+     *
+     * @param VCalendar $calendar
+     * @param string $uid
+     */
+    protected static function removeComponentsByUid(VCalendar $calendar, string $uid): void
+    {
+        $toRemove = [];
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            if (trim((string)($component->UID ?? '')) === $uid) {
+                $toRemove[] = $component;
+            }
+        }
+        foreach ($toRemove as $component) {
+            $calendar->remove($component);
+        }
+    }
+
+    /**
+     * Delete a single occurrence of a recurring event.
+     *
+     * If the occurrence has an override component, remove it and add EXDATE.
+     * If not, just add EXDATE to the master.
+     *
+     * @param VCalendar $calendar
+     * @param string $uid
+     * @param string $recurrenceId
+     * @param string $dateIso
+     */
+    protected static function deleteOccurrence(VCalendar $calendar, string $uid, string $recurrenceId, string $dateIso): void
+    {
+        // Remove any existing override for this occurrence
+        $toRemove = [];
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            if (trim((string)($component->UID ?? '')) !== $uid) continue;
+            if (!isset($component->{'RECURRENCE-ID'})) continue;
+
+            $rid = $component->{'RECURRENCE-ID'}->getDateTime();
+            if ($rid !== null && $rid->format('Y-m-d') === $dateIso) {
+                $toRemove[] = $component;
+            }
+        }
+        foreach ($toRemove as $component) {
+            $calendar->remove($component);
+        }
+
+        // Add EXDATE to the master
+        $master = null;
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            if (trim((string)($component->UID ?? '')) !== $uid) continue;
+            if (isset($component->{'RECURRENCE-ID'})) continue;
+            $master = $component;
+            break;
+        }
+
+        if ($master !== null) {
+            $isAllDay = strtoupper((string)($master->DTSTART['VALUE'] ?? '')) === 'DATE';
+            if ($isAllDay) {
+                $exdateValue = str_replace('-', '', $dateIso);
+                $exdate = $master->add('EXDATE', $exdateValue);
+                $exdate['VALUE'] = 'DATE';
+            } else {
+                $masterStart = $master->DTSTART->getDateTime();
+                $exdateValue = str_replace('-', '', $dateIso) . 'T' . $masterStart->format('His');
+                $tz = $masterStart->getTimezone();
+                if ($tz && $tz->getName() !== 'UTC') {
+                    $exdate = $master->add('EXDATE', $exdateValue);
+                    $exdate['TZID'] = $tz->getName();
+                } else {
+                    $master->add('EXDATE', $exdateValue . 'Z');
+                }
+            }
+        }
+    }
+
+    /**
+     * Delete this and all future occurrences by setting UNTIL on the master RRULE.
+     *
+     * Also removes any override components on or after the given date.
+     *
+     * @param VCalendar $calendar
+     * @param string $uid
+     * @param string $dateIso
+     */
+    protected static function deleteFutureOccurrences(VCalendar $calendar, string $uid, string $dateIso): void
+    {
+        // Remove overrides on or after dateIso
+        $toRemove = [];
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            if (trim((string)($component->UID ?? '')) !== $uid) continue;
+            if (!isset($component->{'RECURRENCE-ID'})) continue;
+
+            $rid = $component->{'RECURRENCE-ID'}->getDateTime();
+            if ($rid !== null && $rid->format('Y-m-d') >= $dateIso) {
+                $toRemove[] = $component;
+            }
+        }
+        foreach ($toRemove as $component) {
+            $calendar->remove($component);
+        }
+
+        // Set UNTIL on the master RRULE to the day before
+        $master = null;
+        foreach ($calendar->select('VEVENT') as $component) {
+            if (!($component instanceof VEvent)) continue;
+            if (trim((string)($component->UID ?? '')) !== $uid) continue;
+            if (isset($component->{'RECURRENCE-ID'})) continue;
+            $master = $component;
+            break;
+        }
+
+        if ($master !== null && isset($master->RRULE)) {
+            $rrule = (string)$master->RRULE;
+            // Remove existing UNTIL or COUNT
+            $rrule = preg_replace('/;?(UNTIL|COUNT)=[^;]*/i', '', $rrule);
+            // Calculate the day before
+            try {
+                $until = new \DateTimeImmutable($dateIso . ' 00:00:00', new \DateTimeZone('UTC'));
+                $until = $until->sub(new \DateInterval('P1D'));
+                $rrule .= ';UNTIL=' . $until->format('Ymd') . 'T235959Z';
+            } catch (Throwable $e) {
+                return;
+            }
+            $master->RRULE = $rrule;
+        }
+    }
+
+    /**
+     * Generate a unique UID for a new calendar event.
+     *
+     * @return string
+     */
+    protected static function generateUid(): string
+    {
+        return sprintf(
+            '%s-%s@luxtools',
+            gmdate('Ymd-His'),
+            bin2hex(random_bytes(8))
+        );
+    }
+
    /**
     * Atomic file write using a temp file and rename.
     *
--- a/style.css
+++ b/style.css
@@ -1,3 +1,5 @@
+/* Dialog infrastructure styles are in dialog.css, loaded via CSS_STYLES_INCLUDED hook in action.php */
+
 /* luxtools plugin styles
 * Keep this minimal and scoped to the plugin container.
 */
@@ -7,7 +9,6 @@ div.luxtools-plugin table thead tr:hover > * {
    background-color: @ini_background_alt !important;
 }

-
 /* "Open Location" row above the header should be visually smaller. */
 div.luxtools-plugin table thead tr.luxtools-openlocation-row td {
    font-size: 80%;
@@ -229,8 +230,12 @@ div.plugin_luxtools_admin form.plugin_luxtools_admin_form label.block > br {
 }

 div.plugin_luxtools_admin form.plugin_luxtools_admin_form textarea.edit,
-div.plugin_luxtools_admin form.plugin_luxtools_admin_form input[type="text"].edit,
-div.plugin_luxtools_admin form.plugin_luxtools_admin_form input[type="number"].edit,
+div.plugin_luxtools_admin
+    form.plugin_luxtools_admin_form
+    input[type="text"].edit,
+div.plugin_luxtools_admin
+    form.plugin_luxtools_admin_form
+    input[type="number"].edit,
 div.plugin_luxtools_admin form.plugin_luxtools_admin_form select {
    flex: 1 1 auto;
    margin-left: auto;
@@ -249,7 +254,10 @@ div.plugin_luxtools_admin form.plugin_luxtools_admin_form select {
 }

 /* Checkbox controls: keep them in the control column, left-aligned. */
-div.plugin_luxtools_admin form.plugin_luxtools_admin_form label.block input[type="checkbox"] {
+div.plugin_luxtools_admin
+    form.plugin_luxtools_admin_form
+    label.block
+    input[type="checkbox"] {
    margin-left: 0;
    align-self: center;
 }
@@ -265,8 +273,12 @@ div.plugin_luxtools_admin form.plugin_luxtools_admin_form label.block input[type
    }

    div.plugin_luxtools_admin form.plugin_luxtools_admin_form textarea.edit,
-    div.plugin_luxtools_admin form.plugin_luxtools_admin_form input[type="text"].edit,
-    div.plugin_luxtools_admin form.plugin_luxtools_admin_form input[type="number"].edit,
+    div.plugin_luxtools_admin
+        form.plugin_luxtools_admin_form
+        input[type="text"].edit,
+    div.plugin_luxtools_admin
+        form.plugin_luxtools_admin_form
+        input[type="number"].edit,
    div.plugin_luxtools_admin form.plugin_luxtools_admin_form select {
        width: 100%;
        max-width: 100%;
@@ -386,12 +398,12 @@ html.luxtools-noscroll body {
 }

 .luxtools-lightbox button.luxtools-lightbox-zone-prev::after {
-    content: '‹';
+    content: "‹";
    left: 0.35em;
 }

 .luxtools-lightbox button.luxtools-lightbox-zone-next::after {
-    content: '›';
+    content: "›";
    right: 0.35em;
 }

@@ -416,7 +428,7 @@ html.luxtools-noscroll body {

 .luxtools-lightbox button.luxtools-lightbox-close:hover,
 .luxtools-lightbox button.luxtools-lightbox-close:focus-visible {
-    background: rgba(0, 0, 0, 0.60);
+    background: rgba(0, 0, 0, 0.6);
    border-radius: 999px;
 }

@@ -432,7 +444,10 @@ html.luxtools-noscroll body {

 .luxtools-grouping {
    display: grid;
-    grid-template-columns: repeat(var(--luxtools-grouping-cols, 2), minmax(0, 1fr));
+    grid-template-columns: repeat(
+        var(--luxtools-grouping-cols, 2),
+        minmax(0, 1fr)
+    );
    gap: var(--luxtools-grouping-gap, 0);
    justify-content: var(--luxtools-grouping-justify, start);
    align-items: var(--luxtools-grouping-align, start);
@@ -604,7 +619,10 @@ div.luxtools-calendar td.luxtools-calendar-day-today {
 }

 div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a {
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a {
    display: flex;
    align-items: center;
    justify-content: center;
@@ -617,33 +635,77 @@ div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > sp
    padding: 0.1em 0;
 }

-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a.wikilink2:link,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a.wikilink2:visited,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a.wikilink2:link,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a.wikilink2:visited {
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > a.wikilink2:link,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > a.wikilink2:visited,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a.wikilink2:link,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a.wikilink2:visited {
    color: @ini_missing;
    border-bottom: 0;
-  }
+}

-
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a:hover,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a:focus,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a:active,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > a:visited,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:hover,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:focus,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:active,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:visited {
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > a:hover,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > a:focus,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > a:active,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > a:visited,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:hover,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:focus,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:active,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:visited {
    text-decoration: none;
    border-bottom: 0;
    box-shadow: none;
 }

-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:visited,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:hover,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:focus,
-div.luxtools-calendar.luxtools-calendar-size-small td.luxtools-calendar-day > span.curid > a:active {
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:visited,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:hover,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:focus,
+div.luxtools-calendar.luxtools-calendar-size-small
+    td.luxtools-calendar-day
+    > span.curid
+    > a:active {
    font-weight: bold;
    text-decoration: underline;
    border-bottom: 0;
@@ -654,21 +716,24 @@ div.luxtools-calendar td.luxtools-calendar-day:hover {
    background-color: @ini_background_alt;
 }

-div.luxtools-calendar td.luxtools-calendar-day.luxtools-calendar-day-today:hover {
+div.luxtools-calendar
+    td.luxtools-calendar-day.luxtools-calendar-day-today:hover {
    background-color: @ini_highlight;
 }

 /* ============================================================
 * Calendar Widget Indicators
 * Colored corner markers showing which slots have events on a day.
- * Positions: general=top-left, maintenance=top-right,
+ * Positions: general=top-left, slot2=top-right,
 *            slot3=bottom-right, slot4=bottom-left (clockwise)
 * ============================================================ */
 div.luxtools-calendar td.luxtools-calendar-day {
    position: relative;
 }

-div.luxtools-calendar.luxtools-calendar-size-large table.luxtools-calendar-table td {
+div.luxtools-calendar.luxtools-calendar-size-large
+    table.luxtools-calendar-table
+    td {
    text-align: left;
    vertical-align: top;
 }
@@ -677,25 +742,36 @@ div.luxtools-calendar.luxtools-calendar-size-large td.luxtools-calendar-day {
    height: 8.25em;
 }

-div.luxtools-calendar.luxtools-calendar-size-large td.luxtools-calendar-day-empty {
+div.luxtools-calendar.luxtools-calendar-size-large
+    td.luxtools-calendar-day-empty {
    height: 8.25em;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-frame {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-frame {
    min-height: 8.25em;
    padding: 0.35em 0.4em 0.4em 0.4em;
    box-sizing: border-box;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number {
    text-align: right;
    margin-bottom: 0.25em;
    line-height: 1.1;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number > a,
-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number > span.curid > a,
-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number span.curid > a {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    > a,
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    > span.curid
+    > a,
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    span.curid
+    > a {
    display: inline;
    min-height: 0;
    padding: 0;
@@ -706,18 +782,30 @@ div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number
    font-weight: bold;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number > a.wikilink2:link,
-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number > a.wikilink2:visited,
-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number span.curid > a.wikilink2:link,
-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-number span.curid > a.wikilink2:visited {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    > a.wikilink2:link,
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    > a.wikilink2:visited,
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    span.curid
+    > a.wikilink2:link,
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-number
+    span.curid
+    > a.wikilink2:visited {
    color: @ini_missing;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-events {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-day-events {
    overflow: hidden;
 }

-div.luxtools-calendar.luxtools-calendar-size-large ul.luxtools-calendar-event-list {
+div.luxtools-calendar.luxtools-calendar-size-large
+    ul.luxtools-calendar-event-list {
    list-style: none;
    margin: 0;
    padding: 0;
@@ -735,17 +823,20 @@ div.luxtools-calendar.luxtools-calendar-size-large li.luxtools-calendar-event {
    cursor: pointer;
 }

-div.luxtools-calendar.luxtools-calendar-size-large li.luxtools-calendar-event:hover {
+div.luxtools-calendar.luxtools-calendar-size-large
+    li.luxtools-calendar-event:hover {
    background-color: @ini_highlight;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-event-time {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-event-time {
    flex: 0 0 auto;
    font-weight: bold;
    white-space: nowrap;
 }

-div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-event-title {
+div.luxtools-calendar.luxtools-calendar-size-large
+    .luxtools-calendar-event-title {
    flex: 1 1 auto;
    min-width: 0;
    white-space: nowrap;
@@ -753,7 +844,8 @@ div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-event-titl
    text-overflow: ellipsis;
 }

-div.luxtools-calendar.luxtools-calendar-size-large li.luxtools-calendar-event-more {
+div.luxtools-calendar.luxtools-calendar-size-large
+    li.luxtools-calendar-event-more {
    border-left-color: @ini_border;
    justify-content: flex-end;
    font-style: italic;
@@ -761,8 +853,10 @@ div.luxtools-calendar.luxtools-calendar-size-large li.luxtools-calendar-event-mo

@media (max-width: 800px) {
    div.luxtools-calendar.luxtools-calendar-size-large td.luxtools-calendar-day,
-    div.luxtools-calendar.luxtools-calendar-size-large td.luxtools-calendar-day-empty,
-    div.luxtools-calendar.luxtools-calendar-size-large .luxtools-calendar-day-frame {
+    div.luxtools-calendar.luxtools-calendar-size-large
+        td.luxtools-calendar-day-empty,
+    div.luxtools-calendar.luxtools-calendar-size-large
+        .luxtools-calendar-day-frame {
        height: 7em;
        min-height: 7em;
    }
@@ -807,7 +901,6 @@ div.luxtools-calendar.luxtools-calendar-size-large li.luxtools-calendar-event-mo
    clip-path: polygon(0 0, 0 100%, 100% 100%);
 }

-
 /* ============================================================
 * Chronological Events on Day Pages
 * ============================================================ */
@@ -833,135 +926,10 @@ div.luxtools-chronological-events li[data-luxtools-event] .luxtools-event-time {
    margin-right: 0.25em;
 }

-
 /* ============================================================
- * Maintenance Tasks
+ * Event Popup (content-specific styles – structural dialog
+ * styles live in dialog.css)
 * ============================================================ */
-div.luxtools-chronological-maintenance li {
-    border-left-color: #e67e22;
-}
-
-li.luxtools-maintenance-task.luxtools-task-completed {
-    opacity: 0.5;
-    text-decoration: line-through;
-}
-
-button.luxtools-task-action,
-button.luxtools-task-complete-btn {
-    margin-left: 0.5em;
-    padding: 0.15em 0.5em;
-    font-size: 0.85em;
-    border: 1px solid @ini_border;
-    border-radius: 0.2em;
-    background-color: @ini_background_alt;
-    cursor: pointer;
-}
-
-button.luxtools-task-action:hover,
-button.luxtools-task-complete-btn:hover {
-    background-color: @ini_highlight;
-}
-
-button.luxtools-task-action:disabled,
-button.luxtools-task-complete-btn:disabled {
-    opacity: 0.5;
-    cursor: wait;
-}
-
-
-/* ============================================================
- * Maintenance Task List (syntax plugin)
- * ============================================================ */
-div.luxtools-maintenance-tasks {
-    margin: 1em 0;
-}
-
-ul.luxtools-maintenance-task-list {
-    list-style: none;
-    padding-left: 0;
-}
-
-ul.luxtools-maintenance-task-list li {
-    padding: 0.35em 0.5em;
-    margin: 0.25em 0;
-    border-left: 3px solid #e67e22;
-}
-
-li.luxtools-task-overdue .luxtools-task-date {
-    color: #c0392b;
-    font-weight: bold;
-}
-
-.luxtools-task-date {
-    font-family: monospace;
-    margin-right: 0.5em;
-}
-
-.luxtools-task-time {
-    font-weight: bold;
-    margin-right: 0.25em;
-}
-
-.luxtools-maintenance-task-item.luxtools-task-completed {
-    opacity: 0.5;
-    text-decoration: line-through;
-}
-
-
-/* ============================================================
- * Event Popup
- * ============================================================ */
-.luxtools-event-popup-overlay {
-    display: none;
-    position: fixed;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
-    background: rgba(0, 0, 0, 0.4);
-    z-index: 10000;
-    justify-content: center;
-    align-items: center;
-}
-
-.luxtools-event-popup {
-    background: @ini_background;
-    border: 1px solid @ini_border;
-    border-radius: 0.4em;
-    padding: 1.5em;
-    max-width: 500px;
-    width: 90%;
-    max-height: 80vh;
-    overflow-y: auto;
-    position: relative;
-    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
-}
-
-.luxtools-event-popup-close {
-    position: absolute;
-    top: 0.5em;
-    right: 0.75em;
-    background: none;
-    border: none;
-    font-size: 1.5em;
-    cursor: pointer;
-    color: @ini_text;
-    line-height: 1;
-}
-
-.luxtools-event-popup-close:hover {
-    opacity: 0.7;
-}
-
-.luxtools-event-popup-title {
-    margin: 0 0 0.75em 0;
-    padding-right: 1.5em;
-}
-
-.luxtools-event-popup-field {
-    margin: 0.5em 0;
-}
-
 .luxtools-event-popup-description {
    white-space: pre-wrap;
    word-break: break-word;
@@ -973,6 +941,73 @@ li.luxtools-task-overdue .luxtools-task-date {
    font-size: 0.9em;
 }

+.luxtools-recurrence-actions {
+    flex-direction: column;
+}
+
+/* Day popup */
+.luxtools-day-popup-events {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+}
+
+.luxtools-day-popup-event-item {
+    padding: 0.3em 0.4em;
+    margin: 0.2em 0;
+    border-radius: 0.2em;
+    cursor: pointer;
+}
+
+.luxtools-day-popup-event-item:hover {
+    background: rgba(0, 0, 0, 0.05);
+}
+
+.luxtools-day-popup-empty {
+    opacity: 0.6;
+    font-style: italic;
+}
+
+/* Event form */
+.luxtools-event-form .luxtools-event-form-field {
+    margin: 0.5em 0;
+}
+
+.luxtools-event-form .luxtools-event-form-field label {
+    display: block;
+}
+
+.luxtools-event-form .luxtools-event-form-field input[type="text"],
+.luxtools-event-form .luxtools-event-form-field input[type="date"],
+.luxtools-event-form .luxtools-event-form-field input[type="time"],
+.luxtools-event-form .luxtools-event-form-field textarea,
+.luxtools-event-form .luxtools-event-form-field select {
+    width: 100%;
+    box-sizing: border-box;
+}
+
+.luxtools-event-form-time-fields {
+    display: flex;
+    gap: 0.75em;
+}
+
+.luxtools-event-form-time-fields .luxtools-event-form-field {
+    flex: 1;
+}
+
+/* Calendar sync widget (syntax) */
+.luxtools-calendar-sync-widget {
+    margin: 0.5em 0;
+}
+
+.luxtools-calendar-sync-status {
+    margin-left: 0.75em;
+}
+
+/* Clickable day cells */
+td.luxtools-calendar-day[data-luxtools-day] {
+    cursor: pointer;
+}

 /* ============================================================
 * Notifications (fallback)
--- a/syntax/calendar.php
+++ b/syntax/calendar.php
@@ -91,6 +91,16 @@ class syntax_plugin_luxtools_calendar extends SyntaxPlugin
        $size = ChronologicalCalendarWidget::normalizeSize((string)($data['size'] ?? 'large'));
        $showTimes = (bool)($data['show_times'] ?? true);

+        if ($size === 'small') {
+            $resolved = $this->resolveMonthFromCookie(
+                'luxtools_calendar_month_' . preg_replace('/[^a-zA-Z0-9]/', '_', $baseNs)
+            ) ?? $this->resolveMonthFromCookie('luxtools_client_month');
+            if ($resolved !== null) {
+                $year = $resolved['year'];
+                $month = $resolved['month'];
+            }
+        }
+
        $slots = CalendarSlot::loadEnabled($this);
        $widgetSlots = CalendarSlot::filterWidgetVisible($slots);
        $indicators = [];
@@ -122,6 +132,25 @@ class syntax_plugin_luxtools_calendar extends SyntaxPlugin
        return true;
    }

+    /**
+     * @param string $cookieName
+     * @return array{year:int,month:int}|null
+     */
+    protected function resolveMonthFromCookie(string $cookieName): ?array
+    {
+        $raw = $_COOKIE[$cookieName] ?? null;
+        if ($raw === null) return null;
+
+        $decoded = json_decode($raw, true);
+        if (!is_array($decoded)) return null;
+
+        $year = (int)($decoded['year'] ?? 0);
+        $month = (int)($decoded['month'] ?? 0);
+        if ($year < 1 || $month < 1 || $month > 12) return null;
+
+        return ['year' => $year, 'month' => $month];
+    }
+
    /**
     * @param string $flags
     * @return array<string,string>
--- a/syntax/calendarsync.php
+++ b/syntax/calendarsync.php
@@ -0,0 +1,79 @@
+<?php
+
+use dokuwiki\Extension\SyntaxPlugin;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * luxtools Plugin: Calendar sync button syntax.
+ *
+ * Renders a manual calendar sync button on any wiki page.
+ * Only visible to admins. The actual sync is handled by the
+ * existing AJAX endpoint (luxtools_calendar_sync).
+ *
+ * Syntax:
+ * - {{calendar_sync>}}
+ */
+class syntax_plugin_luxtools_calendarsync extends SyntaxPlugin
+{
+    /** @inheritdoc */
+    public function getType()
+    {
+        return 'substition';
+    }
+
+    /** @inheritdoc */
+    public function getPType()
+    {
+        return 'block';
+    }
+
+    /** @inheritdoc */
+    public function getSort()
+    {
+        return 225;
+    }
+
+    /** @inheritdoc */
+    public function connectTo($mode)
+    {
+        $this->Lexer->addSpecialPattern('\{\{calendar_sync>\}\}', $mode, 'plugin_luxtools_calendarsync');
+    }
+
+    /** @inheritdoc */
+    public function handle($match, $state, $pos, Doku_Handler $handler)
+    {
+        return [];
+    }
+
+    /** @inheritdoc */
+    public function render($format, Doku_Renderer $renderer, $data)
+    {
+        if ($data === false || !is_array($data)) return false;
+        if ($format !== 'xhtml') return false;
+        if (!($renderer instanceof Doku_Renderer_xhtml)) return false;
+
+        $renderer->nocache();
+
+        // Only render for authenticated users
+        if (empty($_SERVER['REMOTE_USER'])) {
+            return true;
+        }
+
+        $ajaxUrl = defined('DOKU_BASE') ? (string)DOKU_BASE . 'lib/exe/ajax.php' : 'lib/exe/ajax.php';
+        $sectok = function_exists('getSecurityToken') ? getSecurityToken() : '';
+
+        $buttonLabel = (string)$this->getLang('calendar_sync_button');
+        if ($buttonLabel === '') $buttonLabel = 'Sync Calendars';
+
+        $renderer->doc .= '<div class="luxtools-plugin luxtools-calendar-sync-widget">';
+        $renderer->doc .= '<button type="button" class="button luxtools-calendar-sync-btn"'
+            . ' data-luxtools-ajax-url="' . hsc($ajaxUrl) . '"'
+            . ' data-luxtools-sectok="' . hsc($sectok) . '"'
+            . '>' . hsc($buttonLabel) . '</button>';
+        $renderer->doc .= '<span class="luxtools-calendar-sync-status"></span>';
+        $renderer->doc .= '</div>';
+
+        return true;
+    }
+}
--- a/syntax/maintenance.php
+++ b/syntax/maintenance.php
@@ -1,194 +0,0 @@
-<?php
-
-use dokuwiki\Extension\SyntaxPlugin;
-use dokuwiki\plugin\luxtools\CalendarService;
-use dokuwiki\plugin\luxtools\CalendarSlot;
-
-require_once(__DIR__ . '/../autoload.php');
-
-/**
- * luxtools Plugin: Maintenance task list syntax.
- *
- * Renders a list of all non-completed maintenance tasks due today or earlier.
- *
- * Syntax:
- *   {{maintenance_tasks>}}
- *   {{maintenance_tasks>&past=14}}
- */
-class syntax_plugin_luxtools_maintenance extends SyntaxPlugin
-{
-     private const DEFAULT_PAST_DAYS = 30;
-
-    /** @inheritdoc */
-    public function getType()
-    {
-        return 'substition';
-    }
-
-    /** @inheritdoc */
-    public function getPType()
-    {
-        return 'block';
-    }
-
-    /** @inheritdoc */
-    public function getSort()
-    {
-        return 225;
-    }
-
-    /** @inheritdoc */
-    public function connectTo($mode)
-    {
-        $this->Lexer->addSpecialPattern(
-            '\{\{maintenance_tasks>.*?\}\}',
-            $mode,
-            'plugin_luxtools_maintenance'
-        );
-    }
-
-    /** @inheritdoc */
-    public function handle($match, $state, $pos, Doku_Handler $handler)
-    {
-        $match = substr($match, strlen('{{maintenance_tasks>'), -2);
-        $params = $this->parseFlags($match);
-
-        return [
-            'ok' => true,
-            'past' => $this->normalizePastDays($params['past'] ?? null),
-        ];
-    }
-
-    /** @inheritdoc */
-    public function render($format, Doku_Renderer $renderer, $data)
-    {
-        if ($data === false || !is_array($data)) return false;
-        if ($format !== 'xhtml') return false;
-        if (!($renderer instanceof Doku_Renderer_xhtml)) return false;
-
-        $renderer->nocache();
-
-        $slots = CalendarSlot::loadAll($this);
-        $maintenanceSlot = $slots['maintenance'] ?? null;
-
-        if ($maintenanceSlot === null || !$maintenanceSlot->isEnabled()) {
-            $renderer->doc .= '<div class="luxtools-plugin luxtools-maintenance-tasks">'
-                . '<p class="luxtools-empty">'
-                . hsc($this->getLang('maintenance_no_tasks'))
-                . '</p></div>';
-            return true;
-        }
-
-        $todayIso = date('Y-m-d');
-        $pastDays = $this->normalizePastDays($data['past'] ?? null);
-        $tasks = CalendarService::openMaintenanceTasks($maintenanceSlot, $todayIso, $pastDays);
-        $ajaxUrl = defined('DOKU_BASE') ? (string)DOKU_BASE . 'lib/exe/ajax.php' : 'lib/exe/ajax.php';
-        $secToken = function_exists('getSecurityToken') ? (string)getSecurityToken() : '';
-
-        $title = (string)$this->getLang('chronological_maintenance_title');
-        if ($title === '') $title = 'Tasks';
-
-        $renderer->doc .= '<div class="luxtools-plugin luxtools-maintenance-tasks"'
-            . ' data-luxtools-ajax-url="' . hsc($ajaxUrl) . '"'
-            . ' data-luxtools-sectok="' . hsc($secToken) . '">';
-        $renderer->doc .= '<h3>' . hsc($title) . '</h3>';
-
-        if ($tasks === []) {
-            $noTasks = (string)$this->getLang('maintenance_no_tasks');
-            if ($noTasks === '') $noTasks = 'No open tasks.';
-            $renderer->doc .= '<p class="luxtools-empty">' . hsc($noTasks) . '</p>';
-        } else {
-            $renderer->doc .= '<ul class="luxtools-maintenance-task-list">';
-            foreach ($tasks as $task) {
-                $overdue = ($task->dateIso < $todayIso);
-                $classes = 'luxtools-maintenance-task-item';
-                if ($overdue) {
-                    $classes .= ' luxtools-task-overdue';
-                }
-
-                $renderer->doc .= '<li class="' . $classes . '"';
-                $renderer->doc .= ' data-uid="' . hsc($task->uid) . '"';
-                $renderer->doc .= ' data-date="' . hsc($task->dateIso) . '"';
-                $renderer->doc .= ' data-recurrence="' . hsc($task->recurrenceId) . '"';
-                $renderer->doc .= '>';
-
-                // Date badge
-                $renderer->doc .= '<span class="luxtools-task-date">' . hsc($task->dateIso) . '</span> ';
-
-                // Time if not all-day
-                if ($task->time !== '') {
-                    $renderer->doc .= '<span class="luxtools-task-time">' . hsc($task->time) . '</span> ';
-                }
-
-                // Summary
-                $renderer->doc .= '<span class="luxtools-task-summary">' . hsc($task->summary) . '</span>';
-
-                // Complete button
-                $completeLabel = (string)$this->getLang('maintenance_task_complete');
-                if ($completeLabel === '') $completeLabel = 'Complete';
-                $renderer->doc .= ' <button class="luxtools-task-complete-btn" type="button"'
-                    . ' data-action="complete"'
-                    . '>' . hsc($completeLabel) . '</button>';
-
-                $renderer->doc .= '</li>';
-            }
-            $renderer->doc .= '</ul>';
-        }
-
-        $renderer->doc .= '</div>';
-
-        return true;
-    }
-
-    /**
-     * @param string $rawFlags
-     * @return array<string,string>
-     */
-    protected function parseFlags(string $rawFlags): array
-    {
-        $rawFlags = trim($rawFlags);
-        if ($rawFlags === '') {
-            return [];
-        }
-
-        if ($rawFlags[0] === '&') {
-            $rawFlags = substr($rawFlags, 1);
-        }
-
-        $params = [];
-        foreach (explode('&', $rawFlags) as $flag) {
-            if (trim($flag) === '') continue;
-
-            [$name, $value] = array_pad(explode('=', $flag, 2), 2, '');
-            $name = strtolower(trim($name));
-            $value = trim($value);
-
-            if ($name === '') continue;
-            $params[$name] = $value;
-        }
-
-        return $params;
-    }
-
-    /**
-     * @param mixed $value
-     * @return int
-     */
-    protected function normalizePastDays($value): int
-    {
-        if ($value === null || $value === '') {
-            return self::DEFAULT_PAST_DAYS;
-        }
-
-        if (is_int($value)) {
-            return max(0, $value);
-        }
-
-        $value = trim((string)$value);
-        if ($value === '' || !preg_match('/^-?\d+$/', $value)) {
-            return self::DEFAULT_PAST_DAYS;
-        }
-
-        return max(0, (int)$value);
-    }
-}
--- a/task.prompt.md
+++ b/task.prompt.md
@@ -0,0 +1,177 @@
+# Calendar Improvements
+
+## Goal
+
+Improve the calendar feature so that calendar sync is easier to trigger, day and event popups are more useful, and calendar events can be created, edited, and deleted from the UI.
+
+This prompt is intended for an implementation agent. Before changing code, inspect the current implementation and keep changes aligned with existing Dokuwiki and plugin conventions.
+
+## Relevant Code Areas
+
+- `admin/main.php`: admin page that already exposes a manual calendar sync button
+- `action.php`: currently contains calendar AJAX handlers, including manual sync
+- `js/event-popup.js`: current popup behavior for calendar events
+- `syntax/calendar.php`: existing calendar syntax implementation and parsing style
+- `src/ChronologicalCalendarWidget.php`: server-rendered calendar widget HTML and event/day markup
+- `README.md`: should be updated if user-facing syntax or behavior changes
+
+## Current State
+
+- Manual calendar sync already exists, but only through the admin page.
+- Event popups currently open when clicking an event element, not when clicking empty space in a day cell.
+- Event popup currently shows the date/time block.
+- Calendar sync is currently handled in `action.php`.
+- Sync is currently one-directional: remote CalDAV -> local `.ics` file.
+- The README already notes that automatic sync is not implemented and would likely require cron.
+
+## Requested Work
+
+### 1. Add a Manual Sync Syntax
+
+Add a new wiki syntax that renders a manual sync control on normal pages, so sync is not limited to the admin page.
+
+Requirements:
+
+- Reuse the existing sync behavior instead of duplicating logic.
+- Keep permission checks strict. The current sync endpoint is admin-only; preserve that unless a strong reason emerges to change it.
+- Follow the existing syntax plugin style used in `syntax/calendar.php`.
+- Update `README.md` with syntax usage and any permission limitations.
+
+Preferred implementation direction:
+
+- Move sync logic out of `action.php` into a dedicated class/service if that simplifies reuse and maintainability.
+- The syntax should only provide UI/rendering; the actual sync work should remain centralized.
+
+Clarification needed:
+
+- The exact syntax name and parameters are not specified. If no better convention exists in the codebase, choose a minimal, explicit syntax and document it.
+-> Use the syntax name `calendar_sync` with no parameters.
+
+### 2. Improve Event Popups
+
+Update the event popup behavior in `js/event-popup.js` and related server-rendered markup.
+
+Requirements:
+
+- Do not show the date in the popup when the popup is opened from a specific day context.
+- Clicking empty space inside a calendar day cell should open a popup for that day.
+- That day-level popup should list all events for the clicked day.
+- Preserve support for clicking an individual event to inspect that specific event.
+
+Implementation notes:
+
+- Inspect how day cells and event items are rendered in `src/ChronologicalCalendarWidget.php` and related output in `action.php`.
+- Prefer attaching structured data to the rendered day cell rather than scraping text from the DOM.
+- Keep the popup accessible: overlay close, escape key, and explicit close button should continue to work.
+
+Clarification needed:
+
+- The desired behavior when a day has no events is not specified. Reasonable default: show a popup with a short "no events" message plus the create action if event creation is implemented.
+-> yes, show a "no events" message with the create action if implemented.
+
+### 3. Add Event Creation
+
+Add a `Create Event` action to the day popup.
+
+Requirements:
+
+- The action should create a new calendar event for the selected day.
+- After successful creation, the UI should reflect the change without requiring the user to manually refresh unrelated state.
+- Keep the implementation maintainable and explicit.
+
+Clarification needed:
+
+- The request does not specify the input UI for creation. The agent should either:
+    - implement a simple popup form, or
+    - stop and ask for clarification if the appropriate form fields are unclear after inspecting the data model.
+- The target calendar slot for newly created events is not specified.
+- It is not specified whether creation should be admin-only, authenticated-user-only, or available to all viewers.
+- It is not specified whether newly created events must be written only to the local `.ics` file or also to remote CalDAV immediately.
+
+-> Implement a simple input ui as a popup with the same styling as the event popup, with fields for summary, date/time, location, and description. Show a dropdown to select the calendar slot, preselecting the first one. Restrict event creation to authenticated users. Write newly created events to the local `.ics` file only, after that perform the event creation via CalDAV if implemented to prevent a full re-sync.
+
+### 4. Add Event Editing
+
+Add an `Edit` action for existing events.
+
+Requirements:
+
+- The action should allow modification of an existing event from the popup.
+- The correct event instance must be edited, including enough identifier data to distinguish recurring occurrences if necessary.
+- After successful editing, refresh the affected day/event UI.
+
+Clarification needed:
+
+- The editable field set is not defined. At minimum, summary, date/time, location, and description appear relevant, but confirm against the current event model before implementing.
+- Recurring event editing semantics are not defined: edit one occurrence vs. entire series.
+- Remote write-back expectations are not defined.
+
+-> re-use the same input UI as creation, but pre-populate fields with the existing event data. 
+When trying to save a recurring event, ask the user if they want to edit just the selected occurrence or the entire series, or all future occurrences. The changes should be written to the local `.ics` file first, then if CalDAV write-back is implemented, perform the edit via CalDAV to prevent a full re-sync.
+
+### 5. Add Event Deletion
+
+Add a `Delete` action for existing events.
+
+Requirements:
+
+- Deletion should be available from the event popup.
+- Use an explicit confirmation step to avoid accidental deletion.
+- After deletion, update the UI and related calendar data.
+
+Clarification needed:
+
+- Recurring event deletion semantics are not defined: delete one occurrence vs. entire series.
+- Remote write-back expectations are not defined.
+
+-> When trying to delete a recurring event, ask the user if they want to delete just the selected occurrence or the entire series, or all future occurrences. Perform deletion on the local `.ics` file first, then if CalDAV write-back is implemented, perform the deletion via CalDAV to prevent a full re-sync.
+
+### 6. Automatic Sync
+
+Do not treat this as a mandatory coding task unless the implementation path is already obvious and safe.
+
+Required output:
+
+- Provide a short implementation proposal for automatic sync.
+- Compare at least these approaches:
+    - cron invoking a Dokuwiki entry point or plugin-specific script
+    - cron calling the existing AJAX endpoint
+- Recommend the most maintainable option for a long-lived personal Dokuwiki plugin.
+
+Important context:
+
+- The current README already suggests cron as the likely approach.
+- A direct web or AJAX trigger from cron may work, but a CLI-oriented entry point may be more robust and easier to secure.
+
+### 7. Direct Sync of Changed Events
+
+When an event is created, edited, or deleted, the calendar should update promptly so the UI and stored data stay in sync.
+
+Requirements:
+
+- The local calendar data and rendered calendar state should reflect the change immediately after a successful mutation.
+- If remote CalDAV write-back is implemented for create, edit, or delete, trigger it as part of the mutation flow rather than relying on a later full sync.
+- Avoid introducing a design where a later full remote -> local sync silently overwrites recent local edits without warning.
+
+Clarification needed:
+
+- The current system only guarantees remote -> local full sync, with limited immediate remote write-back behavior for maintenance task completion. Create, edit, and delete may require a broader sync design decision before implementation.
+
+-> Implement immediate local updates to the `.ics` file and calendar state for create, edit, and delete actions. If remote CalDAV write-back is implemented, perform that action immediately after the local update within the same user flow to ensure consistency. Avoid a design where local edits are at risk of being overwritten by a later remote sync without user awareness.
+
+## Refactoring Requirement
+
+If calendar sync code is touched, strongly prefer moving reusable sync logic out of `action.php` into a dedicated class under `src/`.
+
+Reason:
+
+- `action.php` currently mixes hook registration, rendering-related behavior, and calendar sync handling.
+- Reusable sync and event mutation logic will be easier to test, reuse, and extend from a dedicated class.
+
+## Expected Deliverables
+
+1. Implement the clearly defined items that can be completed safely from the current codebase.
+2. Mark any blocked items with precise clarification questions instead of guessing.
+3. Update `README.md` for any new syntax, permissions, or workflow changes.
+4. Run `php -l` on changed PHP files.
+5. Summarize remaining design decisions, especially around permissions, recurring events, and remote CalDAV write-back.
Author	SHA1	Message	Date
luxick	e98f9ad2d9	Update deploy scripts	2026-04-06 08:49:33 +02:00
luxick	c1ffbc3f3a	Improve date handling for the calendar widget	2026-04-06 08:49:14 +02:00
luxick	5c74c2e667	Fix timezone parsing for calendars	2026-04-03 15:40:06 +02:00
luxick	1cfd935794	Add zed settings	2026-04-03 15:27:34 +02:00
luxick	8a36333883	Add Validation for time imputs	2026-04-03 15:27:26 +02:00
luxick	e32d69dcc3	Fix date parsing in event-popup	2026-04-03 15:14:42 +02:00
luxick	5c747aaa78	Remove vscode config	2026-04-03 15:12:12 +02:00
luxick	abe805926a	Fix time display	2026-04-03 15:11:52 +02:00
luxick	d33c7a748b	Remove maintenance feature	2026-04-03 14:53:05 +02:00
luxick	946c269d42	Defer Script Tags	2026-03-25 13:37:30 +01:00
luxick	a3f021e5e1	Unify dialog infrastructure	2026-03-20 07:56:41 +01:00
luxick	96cc82db9e	Fix time dispaly in day popup	2026-03-18 14:33:03 +01:00
luxick	975e195ae3	improve calendar features	2026-03-18 14:17:38 +01:00