feat: Phase 2 triage with keyboard shortcuts J/S/X

Implement /triage GET/POST routes in triage.py blueprint; render
phase2.html with day-grouped photo grid, Alpine.js keyboard tagging
(J=journal, S=story, X/Space=skip), and done-button gated on all-tagged.
Remove stub from albums.py; register triage.bp in __init__.py.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/travel-memories/app/routes/albums.py

@@ -70,22 +70,3 @@ def select():
     save_state(state, current_app)
     return redirect(f"/triage?album_id={primary_id}")
 
-
-# TODO(task-6): replace this stub with the real triage route
-@bp.get("/triage")
-def triage():
-    album_id = request.args.get("album_id", "")
-    notes_content = ""
-    phase_stale = []
-    if album_id:
-        state = load_state(album_id, current_app)
-        if state:
-            notes_content = state.notes
-            phase_stale = state.phase_stale
-    return render_template(
-        "base.html",
-        current_phase="triage",
-        album_id=album_id,
-        notes_content=notes_content,
-        phase_stale=phase_stale,
-    )

services/travel-memories/app/routes/triage.py

@@ -0,0 +1,51 @@
+from flask import Blueprint, current_app, jsonify, redirect, render_template, request
+from app.state import load_state, save_state
+
+bp = Blueprint("triage", __name__)
+
+
+@bp.get("/triage")
+def triage():
+    album_id = request.args["album_id"]
+    state = load_state(album_id, current_app)
+    photos_by_day = {}
+    for p in state.photos:
+        day = p.local_datetime[:10]
+        photos_by_day.setdefault(day, []).append(p)
+    all_tagged = all(p.tag != "untagged" for p in state.photos)
+    return render_template(
+        "phase2.html",
+        state=state,
+        photos_by_day=photos_by_day,
+        all_tagged=all_tagged,
+        current_phase="triage",
+        album_id=album_id,
+        phase_stale=state.phase_stale,
+        notes_content=state.notes,
+    )
+
+
+@bp.post("/triage/tag")
+def tag():
+    body = request.get_json()
+    state = load_state(body["album_id"], current_app)
+    for p in state.photos:
+        if p.id == body["asset_id"]:
+            p.tag = body["tag"]
+            break
+    save_state(state, current_app)
+    tagged_count = sum(1 for p in state.photos if p.tag != "untagged")
+    return jsonify({"ok": True, "tagged_count": tagged_count, "total": len(state.photos)})
+
+
+@bp.post("/triage/done")
+def done():
+    body = request.get_json()
+    state = load_state(body["album_id"], current_app)
+    if not all(p.tag != "untagged" for p in state.photos):
+        return jsonify({"error": "not all tagged"}), 400
+    if "triage" not in state.phases_completed:
+        state.phases_completed.append("triage")
+    state.phase = "curate"
+    save_state(state, current_app)
+    return jsonify({"ok": True, "redirect": f"/curate?album_id={body['album_id']}"})