feat: status dropdown on task detail page

web/api.py

@@ -137,6 +137,28 @@ def create_task(body: TaskCreate):
     return t
 
 
+class TaskPatch(BaseModel):
+    status: str
+
+
+VALID_STATUSES = {"pending", "in_progress", "review", "done", "blocked"}
+
+
+@app.patch("/api/tasks/{task_id}")
+def patch_task(task_id: str, body: TaskPatch):
+    if body.status not in VALID_STATUSES:
+        raise HTTPException(400, f"Invalid status '{body.status}'. Must be one of: {', '.join(VALID_STATUSES)}")
+    conn = get_conn()
+    t = models.get_task(conn, task_id)
+    if not t:
+        conn.close()
+        raise HTTPException(404, f"Task '{task_id}' not found")
+    models.update_task(conn, task_id, status=body.status)
+    t = models.get_task(conn, task_id)
+    conn.close()
+    return t
+
+
 @app.get("/api/tasks/{task_id}/pipeline")
 def get_task_pipeline(task_id: str):
     """Get agent_logs for a task (pipeline steps)."""