chore: prettier formatter drift across recent commits

Prettier reformatting on files touched in the wave 11.B sequence —
markdown italics _underscore-style_, single-line conditionals, minor
whitespace fixes. No semantic changes. .env.example reformatting left
unstaged (blocked by pre-commit hook).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/storage/filesystem.ts

@@ -369,9 +369,7 @@ export class FilesystemBackend implements StorageBackend {
    * caller doesn't have to special-case empty trees.
    */
   async listByPrefix(prefix: string): Promise<string[]> {
-    const startAbs = prefix
-      ? this.resolveKey(prefix.replace(/\/+$/, ''))
-      : this.rootResolved;
+    const startAbs = prefix ? this.resolveKey(prefix.replace(/\/+$/, '')) : this.rootResolved;
 
     const out: string[] = [];
     async function walk(dir: string): Promise<void> {
@@ -393,9 +391,7 @@ export class FilesystemBackend implements StorageBackend {
     }
     await walk(startAbs);
 
-    return out
-      .map((abs) => path.relative(this.rootResolved, abs).split(path.sep).join('/'))
-      .sort();
+    return out.map((abs) => path.relative(this.rootResolved, abs).split(path.sep).join('/')).sort();
   }
 
   /** Used by the proxy route — returns the validated absolute path. */