Deploy: add /api/health route + fix deploy git detection

deploy.sh

@@ -60,8 +60,8 @@ fi
 if ! $QUICK_MODE; then
     echo -e "\n${YELLOW}[1/4] Git operations...${NC}"
     
-    # Check for changes
-    if git diff --quiet && git diff --staged --quiet; then
+    # Check for changes (including untracked)
+    if [ -z "$(git status --porcelain)" ]; then
         echo "  No changes to commit"
     else
         git add -A

frontend/src/app/api/health/route.ts

@@ -0,0 +1,57 @@
+export const dynamic = 'force-dynamic'
+
+function jsonResponse(body: unknown, status: number) {
+  return new Response(JSON.stringify(body), {
+    status,
+    headers: {
+      'content-type': 'application/json; charset=utf-8',
+      'cache-control': 'no-store',
+    },
+  })
+}
+
+export async function GET() {
+  const backendBase = (process.env.BACKEND_URL || 'http://127.0.0.1:8000').replace(/\/$/, '')
+  const url = `${backendBase}/health`
+
+  try {
+    const res = await fetch(url, { cache: 'no-store' })
+    const text = await res.text()
+    let backend: unknown = text
+    try {
+      backend = JSON.parse(text)
+    } catch {
+      // keep text
+    }
+
+    if (!res.ok) {
+      return jsonResponse(
+        {
+          status: 'degraded',
+          frontend: { ok: true },
+          backend: { ok: false, status: res.status, body: backend },
+        },
+        503
+      )
+    }
+
+    return jsonResponse(
+      {
+        status: 'ok',
+        frontend: { ok: true },
+        backend: { ok: true, body: backend },
+      },
+      200
+    )
+  } catch (err) {
+    return jsonResponse(
+      {
+        status: 'down',
+        frontend: { ok: true },
+        backend: { ok: false, error: err instanceof Error ? err.message : String(err) },
+      },
+      503
+    )
+  }
+}
+