fix(cli): allow ccs copilot as profile by routing only known subcommands

Changed copilot command routing logic to only intercept known subcommands
(auth, status, models, start, stop, enable, disable, help). When user runs
bare 'ccs copilot' without subcommands, it now falls through to profile
detection and executes Claude with the Copilot API backend.

This allows:
- `ccs copilot auth` → command handler (authenticate)
- `ccs copilot status` → command handler (show status)
- `ccs copilot` → profile execution (run Claude with Copilot)

src/ccs.ts

@@ -339,8 +339,21 @@ async function main(): Promise<void> {
   }
 
   // Special case: copilot command (GitHub Copilot integration)
-  if (firstArg === 'copilot') {
-    // `ccs copilot [subcommand]` - route to copilot command handler
+  // Only route to command handler for known subcommands, otherwise treat as profile
+  const COPILOT_SUBCOMMANDS = [
+    'auth',
+    'status',
+    'models',
+    'start',
+    'stop',
+    'enable',
+    'disable',
+    'help',
+    '--help',
+    '-h',
+  ];
+  if (firstArg === 'copilot' && args.length > 1 && COPILOT_SUBCOMMANDS.includes(args[1])) {
+    // `ccs copilot <subcommand>` - route to copilot command handler
     const { handleCopilotCommand } = await import('./commands/copilot-command');
     const exitCode = await handleCopilotCommand(args.slice(1));
     process.exit(exitCode);