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/gateway/session-bridge.ts

@@ -83,8 +83,8 @@ export class SessionBridge {
   /** Switch a connection to a different session (e.g. resuming an old session). */
   switchSession(connectionId: string, sessionId: string): void {
     const client = this.clients.get(connectionId);
-    if (!client) throw new Error(`Unknown connection: ${connectionId}`);
-    if (client.busy) throw new Error('Cannot switch session while agent is busy');
+    if (!client) {throw new Error(`Unknown connection: ${connectionId}`);}
+    if (client.busy) {throw new Error('Cannot switch session while agent is busy');}
 
     const agent = this.getOrCreateAgent(sessionId);
     client.sessionId = sessionId;
@@ -109,13 +109,13 @@ export class SessionBridge {
   /** Mark a connection's agent as busy/idle. */
   setBusy(connectionId: string, busy: boolean): void {
     const client = this.clients.get(connectionId);
-    if (client) client.busy = busy;
+    if (client) {client.busy = busy;}
   }
 
   /** Set onToolUse callback for a connection's agent. */
   setOnToolUse(connectionId: string, callback: ((event: ToolUseEvent) => void) | undefined): void {
     const client = this.clients.get(connectionId);
-    if (client) client.agent.setOnToolUse(callback);
+    if (client) {client.agent.setOnToolUse(callback);}
   }
 
   /** List all active sessions with connection counts. */
@@ -159,7 +159,7 @@ export class SessionBridge {
     const seen = new Set<string>();
 
     for (const client of this.clients.values()) {
-      if (seen.has(client.sessionId)) continue;
+      if (seen.has(client.sessionId)) {continue;}
       seen.add(client.sessionId);
 
       const usage = client.agent.getUsage();