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/channels/discord/adapter.test.ts

@@ -14,7 +14,7 @@ function createMockClient() {
     _handlers: handlers,
     user: null as { id: string; tag: string } | null,
     on: vi.fn((event: string, handler: (...args: unknown[]) => void) => {
-      if (!handlers.has(event)) handlers.set(event, []);
+      if (!handlers.has(event)) {handlers.set(event, []);}
       handlers.get(event)!.push(handler);
     }),
     login: vi.fn(async (_token: string) => {
@@ -23,7 +23,7 @@ function createMockClient() {
       // Trigger ready event asynchronously
       setTimeout(() => {
         const readyHandlers = handlers.get('ready') ?? [];
-        for (const h of readyHandlers) h();
+        for (const h of readyHandlers) {h();}
       }, 0);
     }),
     destroy: vi.fn(),