Add Projects, Milestones, RAG auto-inject, push notifications, PWA, tag normalisation

## Projects & Milestones (Phases A + G)
- New models: Project, Milestone (Project → Milestone → Task hierarchy)
- notes table: project_id + milestone_id FKs; parent_id FK constraint activated
- Migrations: 0017 (projects), 0018 (push_subscriptions), 0019 (events), 0020 (milestones)
- Services: projects.py, milestones.py (CRUD + progress tracking)
- Routes: /api/projects + /api/projects/<id>/milestones
- LLM tools: create/list/get/update project; create/list milestone; project + milestone + parent_task params on note/task tools
- Frontend: ProjectListView (stacked milestone bars), ProjectView (milestone-grouped kanban), ProjectSelector, MilestoneSelector, NoteEditorView + TaskEditorView updated

## RAG Auto-injection (Phase B)
- Notes ≥0.60 cosine similarity auto-injected into system prompt (max 3, 800 chars each)
- excluded_note_ids param; ChatView "Auto-included" sidebar section

## Summarisation improvements (Phase C)
- Threshold 20→30, keep-recent 6→8, max_tokens 200→400
- Two-pass summarisation for histories >50 messages

## Browser push notifications (Phase E)
- PushSubscription model + migration; pywebpush dependency
- /api/push routes; VAPID config; fire-and-forget on generation complete
- Frontend: sw.js, push store, Settings toggle

## PWA manifest (Phase F)
- manifest.json, Apple meta tags, service worker registration in main.ts

## Tag normalisation
- All tags lowercased + deduplicated at backend (create_note/update_note) and frontend (TagInput sanitize)
- Note/Task types gain project_id + milestone_id fields; store signatures updated

## CalDAV
- Radicale embedded server reverted; back to user-configured external CalDAV

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

src/fabledassistant/routes/milestones.py

@@ -0,0 +1,124 @@
+"""Milestone routes nested under /api/projects/<project_id>/milestones."""
+import logging
+
+from quart import Blueprint, jsonify, request
+
+from fabledassistant.auth import login_required, get_current_user_id
+from fabledassistant.services.milestones import (
+    create_milestone,
+    delete_milestone,
+    get_milestone,
+    get_milestone_progress,
+    list_milestones,
+    update_milestone,
+)
+from fabledassistant.services.notes import list_notes
+from fabledassistant.services.projects import get_project
+
+logger = logging.getLogger(__name__)
+
+milestones_bp = Blueprint("milestones", __name__, url_prefix="/api/projects")
+
+
+@milestones_bp.route("/<int:project_id>/milestones", methods=["GET"])
+@login_required
+async def list_milestones_route(project_id: int):
+    uid = get_current_user_id()
+    project = await get_project(uid, project_id)
+    if project is None:
+        return jsonify({"error": "Project not found"}), 404
+    status = request.args.get("status")
+    milestones = await list_milestones(uid, project_id, status=status)
+    result = []
+    for m in milestones:
+        entry = m.to_dict()
+        progress = await get_milestone_progress(m.id)
+        entry.update(progress)
+        result.append(entry)
+    return jsonify({"milestones": result})
+
+
+@milestones_bp.route("/<int:project_id>/milestones", methods=["POST"])
+@login_required
+async def create_milestone_route(project_id: int):
+    uid = get_current_user_id()
+    project = await get_project(uid, project_id)
+    if project is None:
+        return jsonify({"error": "Project not found"}), 404
+    data = await request.get_json()
+    if not data.get("title"):
+        return jsonify({"error": "title is required"}), 400
+    milestone = await create_milestone(
+        uid,
+        project_id,
+        title=data["title"],
+        description=data.get("description"),
+        order_index=data.get("order_index", 0),
+    )
+    entry = milestone.to_dict()
+    entry.update(await get_milestone_progress(milestone.id))
+    return jsonify(entry), 201
+
+
+@milestones_bp.route("/<int:project_id>/milestones/<int:milestone_id>", methods=["GET"])
+@login_required
+async def get_milestone_route(project_id: int, milestone_id: int):
+    uid = get_current_user_id()
+    milestone = await get_milestone(uid, milestone_id)
+    if milestone is None or milestone.project_id != project_id:
+        return jsonify({"error": "Milestone not found"}), 404
+    entry = milestone.to_dict()
+    entry.update(await get_milestone_progress(milestone.id))
+    return jsonify(entry)
+
+
+@milestones_bp.route("/<int:project_id>/milestones/<int:milestone_id>", methods=["PATCH"])
+@login_required
+async def update_milestone_route(project_id: int, milestone_id: int):
+    uid = get_current_user_id()
+    milestone = await get_milestone(uid, milestone_id)
+    if milestone is None or milestone.project_id != project_id:
+        return jsonify({"error": "Milestone not found"}), 404
+    data = await request.get_json()
+    allowed = {"title", "description", "status", "order_index"}
+    fields = {k: v for k, v in data.items() if k in allowed}
+    updated = await update_milestone(uid, milestone_id, **fields)
+    if updated is None:
+        return jsonify({"error": "Milestone not found"}), 404
+    entry = updated.to_dict()
+    entry.update(await get_milestone_progress(updated.id))
+    return jsonify(entry)
+
+
+@milestones_bp.route("/<int:project_id>/milestones/<int:milestone_id>", methods=["DELETE"])
+@login_required
+async def delete_milestone_route(project_id: int, milestone_id: int):
+    uid = get_current_user_id()
+    milestone = await get_milestone(uid, milestone_id)
+    if milestone is None or milestone.project_id != project_id:
+        return jsonify({"error": "Milestone not found"}), 404
+    deleted = await delete_milestone(uid, milestone_id)
+    if not deleted:
+        return jsonify({"error": "Milestone not found"}), 404
+    return "", 204
+
+
+@milestones_bp.route("/<int:project_id>/milestones/<int:milestone_id>/tasks", methods=["GET"])
+@login_required
+async def get_milestone_tasks_route(project_id: int, milestone_id: int):
+    uid = get_current_user_id()
+    milestone = await get_milestone(uid, milestone_id)
+    if milestone is None or milestone.project_id != project_id:
+        return jsonify({"error": "Milestone not found"}), 404
+    status_filter = request.args.get("status")
+    limit = min(request.args.get("limit", 100, type=int), 500)
+    offset = request.args.get("offset", 0, type=int)
+    notes, total = await list_notes(
+        uid,
+        is_task=True,
+        status=status_filter,
+        milestone_id=milestone_id,
+        limit=limit,
+        offset=offset,
+    )
+    return jsonify({"notes": [n.to_dict() for n in notes], "total": total})