style: format frontend with prettier

Mechanical one-shot pass of pnpm format over src/, tests/, tools/, and
root configs. No functional changes; build and type-check verified.

src/dev/mockScenarios.ts

@@ -1,30 +1,30 @@
 export type MockScenario =
-  | "rich"
-  | "empty"
-  | "busy"
-  | "duplicates"
-  | "album"
-  | "errors"
-  | "huge"
-  | "extreme"
-  | "unready"
-  | "joytag-unready";
+  | 'rich'
+  | 'empty'
+  | 'busy'
+  | 'duplicates'
+  | 'album'
+  | 'errors'
+  | 'huge'
+  | 'extreme'
+  | 'unready'
+  | 'joytag-unready'
 
 const SCENARIOS = new Set<MockScenario>([
-  "rich",
-  "empty",
-  "busy",
-  "duplicates",
-  "album",
-  "errors",
-  "huge",
-  "extreme",
-  "unready",
-  "joytag-unready",
-]);
+  'rich',
+  'empty',
+  'busy',
+  'duplicates',
+  'album',
+  'errors',
+  'huge',
+  'extreme',
+  'unready',
+  'joytag-unready',
+])
 
 export function getMockScenario(): MockScenario {
-  if (typeof window === "undefined") return "rich";
-  const value = new URLSearchParams(window.location.search).get("scenario");
-  return value && SCENARIOS.has(value as MockScenario) ? (value as MockScenario) : "rich";
+  if (typeof window === 'undefined') return 'rich'
+  const value = new URLSearchParams(window.location.search).get('scenario')
+  return value && SCENARIOS.has(value as MockScenario) ? (value as MockScenario) : 'rich'
 }