feat(v4.2.0): Database Templates & Dashboards

- Enhance page_templates: add description, is_recurring, recurrence_rule columns
- New table collection_dashboards for widget-based dashboard layouts
- API: PUT/DELETE /workspace/collections/{id}/templates/page/{tid} — template CRUD
- API: CRUD /workspace/collections/{id}/dashboards (create/list/update/delete)
- Dashboard layout_json supports columns + widgets with view_id/x/y/w/h
- 6 new tests (159 total)

app/db.py

@@ -487,6 +487,34 @@ def init_db():
             pass
         conn.commit()
 
+        # v4.2.0: Collection Templates (enhanced) + Dashboards
+        # Add description, is_recurring, recurrence_rule to page_templates
+        try:
+            conn.execute("ALTER TABLE page_templates ADD COLUMN description TEXT DEFAULT ''")
+        except sqlite3.OperationalError:
+            pass
+        try:
+            conn.execute("ALTER TABLE page_templates ADD COLUMN is_recurring BOOLEAN NOT NULL DEFAULT 0")
+        except sqlite3.OperationalError:
+            pass
+        try:
+            conn.execute("ALTER TABLE page_templates ADD COLUMN recurrence_rule TEXT DEFAULT ''")
+        except sqlite3.OperationalError:
+            pass
+
+        # Dashboard: combinaison de vues/widgets sur une page
+        conn.execute("""
+            CREATE TABLE IF NOT EXISTS collection_dashboards (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                collection_id INTEGER NOT NULL REFERENCES collections(id) ON DELETE CASCADE,
+                name TEXT NOT NULL DEFAULT 'Dashboard',
+                layout_json TEXT NOT NULL DEFAULT '{"columns":1,"widgets":[]}',
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+            )
+        """)
+        conn.commit()
+
 
 @contextmanager
 def get_conn():

app/routers/workspace.py

@@ -296,6 +296,115 @@ async def apply_page_template(request: Request, collection_id: int, tid: int):
     return {"id": cur.lastrowid, "status": "created"}
 
 
+@router.put("/collections/{collection_id}/templates/page/{tid}")
+async def update_page_template(request: Request, collection_id: int, tid: int):
+    """Update a page template — name, properties, content, recurrence."""
+    body = await request.json() if request.headers.get("content-type") else {}
+    with get_conn() as conn:
+        tmpl = conn.execute(
+            "SELECT * FROM page_templates WHERE id=? AND collection_id=?", (tid, collection_id)
+        ).fetchone()
+        if not tmpl:
+            raise HTTPException(404, "Template not found")
+
+        name = body.get("name", tmpl["name"])
+        tmpl_dict = dict(tmpl)
+        description = body.get("description", tmpl_dict.get("description", ""))
+        property_values_json = json.dumps(body.get("properties", json.loads(tmpl["property_values_json"])))
+        content_json = json.dumps(body.get("content", json.loads(tmpl_dict.get("content_json", "[]"))))
+        is_recurring = int(body.get("is_recurring", tmpl_dict.get("is_recurring", 0)))
+        recurrence_rule = body.get("recurrence_rule", tmpl_dict.get("recurrence_rule", ""))
+
+        conn.execute(
+            """UPDATE page_templates SET name=?, description=?, property_values_json=?,
+               content_json=?, is_recurring=?, recurrence_rule=? WHERE id=?""",
+            (name, description, property_values_json, content_json, is_recurring, recurrence_rule, tid),
+        )
+        conn.commit()
+    return {"id": tid, "status": "updated"}
+
+
+@router.delete("/collections/{collection_id}/templates/page/{tid}")
+async def delete_page_template(request: Request, collection_id: int, tid: int):
+    """Delete a page template."""
+    with get_conn() as conn:
+        tmpl = conn.execute(
+            "SELECT * FROM page_templates WHERE id=? AND collection_id=?", (tid, collection_id)
+        ).fetchone()
+        if not tmpl:
+            raise HTTPException(404, "Template not found")
+        conn.execute("DELETE FROM page_templates WHERE id=?", (tid,))
+        conn.commit()
+    return {"id": tid, "status": "deleted"}
+
+
+# ── v4.2.0: Dashboards ──
+
+@router.get("/collections/{collection_id}/dashboards")
+async def list_dashboards(request: Request, collection_id: int):
+    """List all dashboards for a collection."""
+    with get_conn() as conn:
+        rows = conn.execute(
+            "SELECT * FROM collection_dashboards WHERE collection_id=? ORDER BY name", (collection_id,)
+        ).fetchall()
+    return {"dashboards": [dict(r) for r in rows]}
+
+
+@router.post("/collections/{collection_id}/dashboards")
+async def create_dashboard(request: Request, collection_id: int):
+    """Create a new dashboard for a collection."""
+    body = await request.json() if request.headers.get("content-type") else {}
+    name = body.get("name", "Dashboard").strip()
+    layout = json.dumps(body.get("layout", {"columns": 1, "widgets": []}))
+
+    with get_conn() as conn:
+        coll = conn.execute("SELECT id FROM collections WHERE id=?", (collection_id,)).fetchone()
+        if not coll:
+            raise HTTPException(404, "Collection not found")
+        cur = conn.execute(
+            "INSERT INTO collection_dashboards (collection_id, name, layout_json) VALUES (?,?,?)",
+            (collection_id, name, layout),
+        )
+        conn.commit()
+    return {"id": cur.lastrowid, "name": name, "status": "created"}
+
+
+@router.put("/collections/{collection_id}/dashboards/{did}")
+async def update_dashboard(request: Request, collection_id: int, did: int):
+    """Update a dashboard — name or layout (widgets grid)."""
+    body = await request.json() if request.headers.get("content-type") else {}
+    with get_conn() as conn:
+        dash = conn.execute(
+            "SELECT * FROM collection_dashboards WHERE id=? AND collection_id=?", (did, collection_id)
+        ).fetchone()
+        if not dash:
+            raise HTTPException(404, "Dashboard not found")
+
+        name = body.get("name", dash["name"])
+        layout = json.dumps(body.get("layout", json.loads(dash["layout_json"])))
+
+        conn.execute(
+            "UPDATE collection_dashboards SET name=?, layout_json=?, updated_at=CURRENT_TIMESTAMP WHERE id=?",
+            (name, layout, did),
+        )
+        conn.commit()
+    return {"id": did, "status": "updated"}
+
+
+@router.delete("/collections/{collection_id}/dashboards/{did}")
+async def delete_dashboard(request: Request, collection_id: int, did: int):
+    """Delete a dashboard."""
+    with get_conn() as conn:
+        dash = conn.execute(
+            "SELECT * FROM collection_dashboards WHERE id=? AND collection_id=?", (did, collection_id)
+        ).fetchone()
+        if not dash:
+            raise HTTPException(404, "Dashboard not found")
+        conn.execute("DELETE FROM collection_dashboards WHERE id=?", (did,))
+        conn.commit()
+    return {"id": did, "status": "deleted"}
+
+
 # ── CSV Import/Export ──
 
 @router.post("/collections/{collection_id}/import/csv")