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/komoot-import/proposal.md

@@ -0,0 +1,32 @@
+## Why
+
+Users switching to trails.cool have years of tours on Komoot. Without import,
+they start with an empty Journal — no history, no motivation to switch. A
+one-click Komoot import lets users bring their existing tours and start using
+trails.cool immediately.
+
+## What Changes
+
+- Add Komoot account connection flow (email + password → API credentials)
+- Import Komoot tours as Journal activities with route data
+- Batch import with progress tracking, deduplication, and error handling
+- Integration settings page to manage connected accounts and trigger imports
+- Fetch full tour GPX (not just metadata) so imported routes have geometry
+
+## Capabilities
+
+### New Capabilities
+
+- `komoot-import`: Connect a Komoot account, import tours as activities with routes, track import progress, deduplicate on re-import
+
+### Modified Capabilities
+
+- `route-management`: Routes can now be created via import (not just manual creation), with an external source tracking field
+
+## Impact
+
+- **Database**: New tables for integration connections and import batches in `journal` schema
+- **Files**: New routes (`/integrations`, `/api/integrations/*`), new server utilities for Komoot API, new DB schema tables
+- **Dependencies**: No new packages needed — uses fetch for Komoot API, existing Drizzle for DB
+- **Privacy**: Komoot credentials stored encrypted. Must be documented in privacy manifest.
+- **External**: Komoot API (api.komoot.de) — basic auth, no official developer program