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/Day-Plans-and-Notes.md

@@ -0,0 +1,73 @@
+# Day Plans and Notes
+
+The Day Plan sidebar lets you organize places into days, add free-form notes, and manage the order of your itinerary.
+
+<!-- TODO: screenshot: itinerary view with assigned places and day notes -->
+
+![Day Plan](assets/TripPlaner.png)
+
+## The Day Plan sidebar
+
+The Day Plan sidebar is the left panel in the trip planner. Each trip day is shown as a collapsible section. Expanded or collapsed state is saved per trip in `sessionStorage` (key: `day-expanded-{tripId}`), so your layout is preserved across page reloads in the same browser session.
+
+## Day timeline
+
+Each day shows a merged, time-ordered list of:
+
+- **Assigned places** — with time, category icon, and action buttons
+- **Day notes** — with their selected icon and optional time
+- **Reservations and transports** — non-hotel types (flights, trains, cars, cruises) appear inline; hotels appear in the Day Detail panel
+
+Items are sorted by their time or position index.
+
+## Assigning places to a day
+
+- **Drag and drop** — drag a place from the right-hand Places sidebar and drop it onto a day section or between existing items.
+- **Mobile** — tap the **Add Place** button inside an expanded day section to open an inline search panel; find the place and tap it to assign.
+
+You can also reorder places within a day, or move them to a different day, by dragging and dropping inside the sidebar.
+
+## Multi-day reservations
+
+A reservation that spans multiple days appears in each relevant day with a phase label:
+
+| Reservation type | Start day | Middle days | End day |
+|---|---|---|---|
+| Flight | Departure | In transit | Arrival |
+| Car | Pickup | Active | Return |
+| Other | Start | Ongoing | End |
+
+Car rentals that are in the "Active" (middle) phase are shown in the day header rather than the timeline.
+
+## Day notes
+
+Click the note **+** button in any day section to add a note. Notes have three fields:
+
+- **Title** (required) — the main note text shown in the timeline
+- **Subtitle / detail** (optional) — a free-form text field (Markdown supported) displayed beneath the title
+- **Icon** — choose from 20 icons: FileText, Info, Clock, MapPin, Navigation, Train, Plane, Bus, Car, Ship, Coffee, Ticket, Star, Heart, Camera, Flag, Lightbulb, AlertTriangle, ShoppingBag, Bookmark
+
+Notes interleave with places and transports in the day timeline and are ordered by their `sort_order`. Use the **↑ / ↓** chevron buttons on a note to reposition it within the merged timeline. Notes can also be repositioned by dragging.
+
+## Day Detail panel
+
+Click a day header to open the Day Detail panel. It appears as a floating panel centered in the map area and shows:
+
+- The weather forecast for that day (see [Weather-Forecasts](Weather-Forecasts))
+- Reservations linked to assignments on that day
+- Accommodation block (hotel check-in / check-out, with check-in window and confirmation number)
+
+The panel can be collapsed to a slim header bar or closed entirely with the **X** button.
+
+## Toolbar actions
+
+At the top of the Day Plan sidebar:
+
+- **Export PDF** — downloads a PDF of the full trip plan. See [PDF-Export](PDF-Export).
+- **ICS** — exports the trip as a calendar file (.ics) for import into calendar apps.
+- **Expand / Collapse all** — toggles all day sections open or closed at once.
+- **Undo** — reverses the last drag, reorder, or assign action.
+
+Route calculation controls (optimize order, open in Google Maps) appear inside each expanded day section after the place list.
+
+**See also:** [Places-and-Search](Places-and-Search) · [Map-Features](Map-Features) · [Route-Optimization](Route-Optimization) · [Weather-Forecasts](Weather-Forecasts) · [Reservations-and-Bookings](Reservations-and-Bookings)