docs: add full wiki with 74 pages, assets, and CI workflow

Adds the complete TREK documentation wiki covering installation,
trip planning, admin panel, MCP/AI integration, addons, and operations.

Also fixes encrypt-at-rest gaps: mapbox_access_token, Synology
credentials, per-user webhook/ntfy tokens, and photo passphrases
are now rotated by migrate-encryption.ts and stored encrypted via
settingsService.

wiki/My-Trips-Dashboard.md

@@ -0,0 +1,66 @@
+# My Trips Dashboard
+
+The dashboard at `/dashboard` is your home base — it lists all your trips, lets you create new ones, and surfaces quick-access widgets.
+
+<!-- TODO: screenshot: trips grid with spotlight card -->
+
+![My Trips Dashboard](assets/DashboardWidgets.png)
+
+## View Modes
+
+Use the toggle button in the top toolbar to switch between **grid** (card thumbnails) and **list** (compact rows). Your preference is saved in `localStorage` under the key `trek_dashboard_view` and persists across sessions.
+
+In grid mode the dashboard shows a large [Spotlight card](#spotlight-card) for your most relevant trip, with remaining trips in a responsive grid below. In list mode the Spotlight card is not shown separately — all trips (including the one that would be the spotlight) appear as uniform rows in the same sort order.
+
+## Sort Order
+
+Trips are always sorted in this order:
+
+1. **Ongoing** — trips where today falls between the start and end date.
+2. **Upcoming** — future trips, sorted by start date ascending (soonest first).
+3. **Past** — completed trips, sorted by start date descending (most recent first).
+
+Trips without dates are treated as past.
+
+## Spotlight Card
+
+The first ongoing trip — or the next upcoming trip if none is ongoing — is promoted to a full-width **Spotlight card** at the top of the grid on desktop. On mobile this card appears as a hero at the top of the page. The spotlight card shows a progress bar for ongoing trips and a stats strip (days, places, travel companions).
+
+If you have no trips yet, the spotlight card is not shown.
+
+## Archived Trips
+
+Archived trips are hidden from the main list and collapsed into a separate **Archived** section at the bottom of the page. Click the section header to expand it. You can **Copy**, **Restore**, or permanently **Delete** an archived trip from the row actions.
+
+## Greeting (Mobile)
+
+On mobile, the header shows a time-of-day greeting — "Good morning", "Good afternoon", or "Good evening" — along with your username and avatar. The greeting changes at 12:00 (noon) and 18:00. The mobile header also includes a **Notifications** button (bell icon) that navigates to `/notifications`.
+
+## Dashboard Widgets Sidebar
+
+On wide screens a sticky right column shows the **Currency Converter** and **Timezone Clock** widgets. Each can be toggled on or off via the Settings icon in the toolbar. On mobile, the widgets are available as a bottom sheet from the quick-action buttons at the top of the page.
+
+See [Dashboard-Widgets](Dashboard-Widgets) for full usage details.
+
+## Per-Trip Actions
+
+On desktop, hover over a card (or open the row actions in list view) to reveal the action buttons — they appear on mouse-over only. On mobile, action buttons are always visible directly on the card cover. The available actions are:
+
+| Action | Permission required |
+|---|---|
+| **Edit** | `trip_edit` or `trip_cover_upload` on that trip |
+| **Copy** | `trip_create` |
+| **Archive / Unarchive** | `trip_archive` on that trip |
+| **Delete** | `trip_delete` on that trip |
+
+Actions not permitted for your role are hidden. Admins always see all actions.
+
+## Empty State
+
+When you have no trips, the dashboard shows an illustration and a **Plan your first trip** button that opens the [Creating-a-Trip](Creating-a-Trip) dialog.
+
+## Related Pages
+
+- [Creating-a-Trip](Creating-a-Trip)
+- [Trip-Planner-Overview](Trip-Planner-Overview)
+- [Dashboard-Widgets](Dashboard-Widgets)