Add updateDeviceMetadata method to api.ts

Add method to update device location and description via Legacy API
device_form endpoint. Uses getLegacyWebViewCredentials for auth.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

services/api.ts

@@ -1727,6 +1727,61 @@ class ApiService {
     }
   }
 
+  /**
+   * Update device metadata (location, description) in Legacy API
+   * Uses device_form endpoint
+   */
+  async updateDeviceMetadata(
+    deviceId: string,
+    updates: {
+      location?: string;
+      description?: string;
+    }
+  ): Promise<ApiResponse<{ success: boolean }>> {
+    try {
+      const creds = await this.getLegacyWebViewCredentials();
+      if (!creds) {
+        return { ok: false, error: { message: 'Not authenticated with Legacy API', code: 'UNAUTHORIZED' } };
+      }
+
+      const formData = new URLSearchParams({
+        function: 'device_form',
+        user_name: creds.userName,
+        token: creds.token,
+        device_id: deviceId,
+      });
+
+      // Add optional fields if provided
+      if (updates.location !== undefined) {
+        formData.append('location', updates.location);
+      }
+      if (updates.description !== undefined) {
+        formData.append('description', updates.description);
+      }
+
+      const response = await fetch(API_BASE_URL, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+        body: formData.toString(),
+      });
+
+      if (!response.ok) {
+        return { ok: false, error: { message: 'Failed to update device' } };
+      }
+
+      const data = await response.json();
+
+      if (data.status !== '200 OK') {
+        return { ok: false, error: { message: data.message || 'Failed to update device' } };
+      }
+
+      return { ok: true, data: { success: true } };
+    } catch (error: any) {
+      console.error('[API] updateDeviceMetadata error:', error);
+      return { ok: false, error: { message: error.message || 'Network error', code: 'NETWORK_ERROR' } };
+    }
+  }
+
   /**
    * Detach device from beneficiary
    */