fix(types): replace all as any with proper type assertions

Eliminate unsafe `as any` casts across 21 non-test source files,
replacing them with specific type annotations:

- Bridge transport: use StdoutMessage type for write/writeBatch calls
- print.ts: type msg.request as Record<string, unknown> for unknown
  SDK control subtypes; use StdoutMessage for output.enqueue()
- API providers (openai/grok/gemini): import ChatCompletion types,
  type streams as AsyncIterable<ChatCompletionChunk>, type request
  bodies as ChatCompletionCreateParamsStreaming
- Computer use executor: use Partial<ResolvePrepareCaptureResult>
  for cross-platform screenshot result
- Components: replace Ink color string casts with proper typing
- Win32 bridge: type stdin as Writable after null check

All 2453 tests pass with 0 failures.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/commands/remoteControlServer/remoteControlServer.tsx

@@ -148,7 +148,7 @@ function ServerManagementDialog({ onDone }: Props): React.ReactNode {
       <Box flexDirection="column" gap={1}>
         <Text>
           Remote Control Server is{' '}
-          <Text bold color="green">
+          <Text bold color="success">
             running
           </Text>
           {daemonProcess ? ` (PID: ${daemonProcess.pid})` : ''}
@@ -233,10 +233,10 @@ function startDaemon(): void {
     }
   });
 
-  child.on('exit', (code, signal) => {
+  child.on('exit', (code: number | null, signal: NodeJS.Signals | null) => {
     daemonProcess = null;
     daemonStatus = 'stopped';
-    daemonLogs.push(`[daemon] exited (code=${code}, signal=${signal})`);
+    daemonLogs.push(`[daemon] exited (code=${code ?? 'unknown'}, signal=${signal})`);
   });
 
   child.on('error', (err: Error) => {