style: auto-fix ESLint issues (curly braces and formatting)

- Add curly braces to all if/else/for/while statements
- Fix indentation and trailing spaces
- Auto-fixed 372 linting errors using eslint --fix
- Remaining issues are warnings only (non-null assertions, explicit any types)

src/cli/shared.ts

@@ -21,7 +21,7 @@ export function getDataDir(): string {
  */
 export function resolveOverlayPath(basePath: string): string | undefined {
   const env = process.env.FLYNN_ENV;
-  if (!env) return undefined;
+  if (!env) {return undefined;}
   const configDir = dirname(basePath);
   return join(configDir, `${env}.yaml`);
 }
@@ -44,8 +44,8 @@ export function redactSecrets(config: Record<string, unknown>): Record<string, u
   const sensitiveKeys = ['bot_token', 'api_key', 'auth_token'];
 
   function redact(obj: unknown): unknown {
-    if (obj === null || obj === undefined) return obj;
-    if (Array.isArray(obj)) return obj.map(redact);
+    if (obj === null || obj === undefined) {return obj;}
+    if (Array.isArray(obj)) {return obj.map(redact);}
     if (typeof obj === 'object') {
       const result: Record<string, unknown> = {};
       for (const [key, value] of Object.entries(obj as Record<string, unknown>)) {