feat: gear registry — manage bikes/shoes per athlete, set per activity

- New /api/gear CRUD endpoints (gear.json per user)
- Gear tab in AthleteView (owner-only): add, edit, retire items
- EditDrawer gear field becomes a dropdown when registry has items
- Strava API sync now resolves gear_id → name, adds to registry automatically
- Strava ZIP import reads Gear column from activities.csv
- POST /api/strava/import-gear for one-time backfill from stored originals

gear_plan.md

@@ -0,0 +1,64 @@
+# Gear Feature Plan
+
+## Why the gap exists
+
+Neither sync path populates gear today. The Strava API returns `gear_id` per activity
+(brut's originals show `b3437566`, `g10422777` etc.) but `strava_to_parsed()` ignores it.
+The ZIP path also ignores the gear column in activities.csv.
+Diego_p's "Rose Backroad" was set manually via the EditDrawer free-text field.
+
+---
+
+## Data model — `{user_dir}/gear.json`
+
+```json
+{
+  "items": [
+    {
+      "id": "uuid-abc123",
+      "name": "Rose Backroad",
+      "type": "bike",
+      "retired": false,
+      "strava_id": "b3437566"
+    }
+  ]
+}
+```
+
+- `type` enum: `bike | shoes | skis | other`
+- Per-activity gear stays as a plain string (the gear **name**) — backward compatible with existing sidecars
+- `strava_id` is optional, used for deduplication during Strava sync
+
+---
+
+## Build order
+
+### [x] Step 1 — `gear.json` CRUD API ✓
+File: `bincio/serve/routers/gear.py`
+- `GET /api/gear` → list items (auth required)
+- `POST /api/gear` → add item (auto-generate UUID id)
+- `PATCH /api/gear/{id}` → update (name, type, retired)
+- `DELETE /api/gear/{id}` → delete
+File lives at `{user_dir}/gear.json`, same pattern as `athlete.json`.
+Add gear router to `server.py`.
+
+### [x] Step 2 — Gear tab in AthleteView (ownerOnly) ✓
+- Added `'gear'` to `Tab` type and `ALL_TABS` in `AthleteView.svelte`
+- Inline gear management: list, add, edit, retire — no separate component
+
+### [x] Step 3 — EditDrawer gear selector ✓
+- At drawer open, fetches `/api/gear`
+- Shows `<select>` from registry (if items exist), with "Other…" revealing text input
+- Falls back to plain text input if no gear items registered
+- Value still stored as gear name string — backward compatible
+
+### [x] Step 4 — Strava sync gear extraction ✓
+- `strava_api.py`: added `fetch_gear()` + `gear` field on `strava_to_parsed()` via `_gear_name` meta key
+- `ingest.py`: during sync, resolves gear_id → name, adds new items to registry
+- New endpoint `POST /api/strava/import-gear`: one-time backfill from stored originals
+
+### [x] Step 5 — ZIP import gear column ✓
+- `strava_zip.py`: reads `Gear` column from activities.csv and sets `parsed.gear`
+
+### [x] Step 6 — One-time backfill endpoint ✓
+`POST /api/strava/import-gear` implemented in `strava.py`.