Feedback form: load categories from the BFF

The form offers the admin-managed categories, falling back to the original
four if they can't be loaded. "My feedback" shows the server's labels.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/social.ts

@@ -212,6 +212,8 @@ export type Feedback = {
   id: string;
   user_id?: string;
   category: string;
+  /** The category's current display name (renames apply to past feedback). */
+  category_label?: string;
   message: string;
   contact_email?: string;
   created_at: string;
@@ -560,13 +562,25 @@ export const collections = {
 
 // ─── Feedback ────────────────────────────────────────────────────────────
 
+/** One option on the /feedback form, managed from the admin panel. */
+export type FeedbackCategory = {
+  key: string;
+  label: string;
+  description: string;
+};
+
 export const feedback = {
+  /** The form's categories, in order. Public. */
+  categories() {
+    return call<FeedbackCategory[]>("/feedback/categories");
+  },
   /** Submit a /feedback page entry. When the viewer is signed in the
    *  BFF captures their user_id automatically via the auth cookie —
    *  the form doesn't ask for it. `contact_email` is required only
    *  for anonymous submissions; the BFF re-enforces that on its end. */
   submit(input: {
-    category: "bug" | "feature" | "general" | "other";
+    /** A FeedbackCategory key. */
+    category: string;
     message: string;
     contact_email?: string;
   }) {