fix(companion): type-guard event wait name validation

src/companion/runtimeClient.test.ts

@@ -350,6 +350,9 @@ describe('CompanionRuntimeClient', () => {
 
     expect(() => client.waitForEvent('')).toThrow('eventName must be a non-empty string');
     expect(() => client.waitForEvent('   ')).toThrow('eventName must be a non-empty string');
+    expect(() => client.waitForEvent(123 as unknown as string)).toThrow(
+      'eventName must be a non-empty string',
+    );
   });
 
   it('waitForEvent supports AbortSignal cancellation', async () => {
@@ -585,6 +588,9 @@ describe('CompanionRuntimeClient', () => {
     expect(() => client.waitForAnyEvent(['agent.stream', '  '])).toThrow(
       'eventNames must not contain empty values',
     );
+    expect(() => client.waitForAnyEvent(['agent.stream', 123 as unknown as string])).toThrow(
+      'eventNames must not contain empty values',
+    );
   });
 
   it('connects and performs node registration + capability discovery', async () => {

src/companion/runtimeClient.ts

@@ -437,7 +437,7 @@ export class CompanionRuntimeClient {
       signal?: AbortSignal;
     },
   ): Promise<TData> {
-    if (eventName.trim().length === 0) {
+    if (typeof eventName !== 'string' || eventName.trim().length === 0) {
       throw new Error('eventName must be a non-empty string');
     }
     const timeoutMs = options?.timeoutMs ?? this.requestTimeoutMs;
@@ -505,7 +505,11 @@ export class CompanionRuntimeClient {
     if (eventNames.length === 0) {
       throw new Error('eventNames must contain at least one event name');
     }
-    if (eventNames.some((eventName) => eventName.trim().length === 0)) {
+    if (
+      eventNames.some(
+        (eventName) => typeof eventName !== 'string' || eventName.trim().length === 0,
+      )
+    ) {
       throw new Error('eventNames must not contain empty values');
     }
     const eventNameSet = new Set(eventNames);