style(admin-web): apply Prettier formatting

Run `prettier --write .` across all source files. Changes are purely
formatting: trailing commas, line wrapping at 120 chars, import
reordering, and CSS whitespace. No logic changes. Verified with
`prettier --check .` and `svelte-check` (0 errors, 0 warnings).

hub/admin-web/src/lib/session.ts

@@ -10,7 +10,7 @@ interface SessionState {
 export const session = writable<SessionState>({
 	loading: true,
 	me: null,
-	error: null
+	error: null,
 });
 
 export async function loadSession(): Promise<void> {
@@ -27,7 +27,7 @@ export async function loadSession(): Promise<void> {
 		session.set({
 			loading: false,
 			me: null,
-			error: err instanceof Error ? err.message : String(err)
+			error: err instanceof Error ? err.message : String(err),
 		});
 	}
 }