Add 8 proposed changes and old trails analysis

Proposed changes (all with proposal, design, specs, tasks):
- app-navigation (9 tasks) — nav bars for both apps
- planner-landing-page (7 tasks) — standalone landing page
- planner-multiplayer-awareness (13 tasks) — participants, cursors, names
- changelog (13 tasks) — public changelog with "what's new"
- transactional-emails (15 tasks) — magic link + welcome emails
- planner-features (18 tasks) — no-go areas, notes, recovery, rate limits
- komoot-import (23 tasks) — Komoot tour import
- route-features (37 tasks) — sharing, multi-day, spatial, photos

Also adds docs/old-trails-analysis.md with feature analysis from the
older trails project.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

openspec/changes/planner-multiplayer-awareness/proposal.md

@@ -0,0 +1,35 @@
+## Why
+
+The Planner supports collaborative editing but the multiplayer experience is
+bare. Users can't see who else is in the session. Cursor labels are small
+floating divs that look broken (no proper styling, overlap with map controls).
+Users get randomly assigned names like "Hiker" or "Explorer" with no way to
+change them. This makes collaboration confusing — you can't tell who is who.
+
+## What Changes
+
+- **Participant list**: Show who's in the session (name, color, host badge)
+  in the sidebar or header
+- **Name editing**: Let users set their name after joining (persisted in
+  localStorage, synced via Yjs awareness)
+- **Cursor styling**: Fix cursor labels — proper pointer icon, name tag with
+  shadow, avoid overlap with map controls
+- **Connection indicators**: Show when participants join/leave
+
+## Capabilities
+
+### New Capabilities
+
+(None — this enhances existing Yjs awareness features.)
+
+### Modified Capabilities
+
+- `planner-session`: Session view gains participant list and name editing
+- `map-display`: Map cursor rendering improved
+
+## Impact
+
+- **Files**: `PlannerMap.tsx` (cursor styling), `SessionView.tsx` (participant
+  list), `use-yjs.ts` (name editing), new `ParticipantList` component
+- **Dependencies**: None
+- **i18n**: New keys for participant labels and name editing