项目目录从 refer 迁移到 local

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

local/backend/app/api/routes.py

@@ -0,0 +1,40 @@
+"""API 路由 — Phase 0 仅 /health 与 /api/capabilities。"""
+from __future__ import annotations
+
+from fastapi import APIRouter
+
+from app import __version__
+from app.tickflow import client as tf_client
+from app.tickflow.policy import detect_capabilities, tier_label
+
+router = APIRouter()
+
+
+@router.get("/health")
+def health() -> dict:
+    return {
+        "status": "ok",
+        "version": __version__,
+        # 三态: none(无key/无效) / free(免费key) / api_key(付费档)
+        "mode": tf_client.current_mode(),
+    }
+
+
+@router.get("/api/capabilities")
+def capabilities() -> dict:
+    """前端用来决定哪些功能可用、哪些灰显。"""
+    capset = detect_capabilities()
+    return {
+        "label": tier_label(),
+        "capabilities": capset.to_dict(),
+    }
+
+
+@router.post("/api/capabilities/redetect")
+def redetect() -> dict:
+    """用户在设置页"重新检测"按钮。"""
+    capset = detect_capabilities(force=True)
+    return {
+        "label": tier_label(),
+        "capabilities": capset.to_dict(),
+    }