Phase 2 Complete by Claude Code

frontend/src/api/client.js

@@ -57,6 +57,39 @@ class ApiClient {
   delete(endpoint) {
     return this.request(endpoint, { method: "DELETE" });
   }
+
+  async upload(endpoint, file) {
+    const url = `${API_BASE}${endpoint}`;
+    const token = this.getToken();
+
+    const formData = new FormData();
+    formData.append("file", file);
+
+    const headers = {};
+    if (token) {
+      headers["Authorization"] = `Bearer ${token}`;
+    }
+
+    const response = await fetch(url, {
+      method: "POST",
+      headers,
+      body: formData,
+    });
+
+    if (response.status === 401) {
+      localStorage.removeItem("access_token");
+      localStorage.removeItem("user");
+      window.location.href = "/login";
+      throw new Error("Session expired");
+    }
+
+    if (!response.ok) {
+      const error = await response.json().catch(() => ({}));
+      throw new Error(error.detail || `Upload failed: ${response.status}`);
+    }
+
+    return response.json();
+  }
 }
 
 const api = new ApiClient();