fix(dispatcher): treat --print as non-subcommand Claude session (#1341)

* fix(dispatcher): treat --print as non-subcommand Claude session

* style: apply prettier formatting

* fix(dispatcher): correct return type in subcommand detector

getClaudeSubcommandName returns string | null; return false (boolean)
was invalid after dev refactored isClaudeSubcommandInvocation to
delegate to it. Change to return null to preserve the --print safety
fix intent.

tests/unit/utils/claude-subcommand-detector.test.ts

@@ -56,6 +56,12 @@ describe('isClaudeSubcommandInvocation', () => {
     expect(isClaudeSubcommandInvocation(['--name', 'auth'])).toBe(false);
   });
 
+
+  it('treats --print prompt mode as non-subcommand even with subcommand-like prompt text', () => {
+    expect(isClaudeSubcommandInvocation(['--print', 'agents'])).toBe(false);
+    expect(isClaudeSubcommandInvocation(['--print', 'doctor'])).toBe(false);
+  });
+
   it('handles --flag=value forms', () => {
     expect(isClaudeSubcommandInvocation(['--model=sonnet', 'agents'])).toBe(true);
   });
@@ -201,6 +207,13 @@ describe('subcommand passthrough — injectors short-circuit', () => {
     expect(appendBrowserToolArgs(['remote-control'])).toEqual(['remote-control']);
   });
 
+
+  it('injectors still inject in --print prompt mode with subcommand-like prompt text', () => {
+    const out = appendThirdPartyWebSearchToolArgs(['--print', 'agents']);
+    expect(out).toContain('--append-system-prompt');
+    expect(out).toContain('--disallowedTools');
+  });
+
   it('injectors still inject for non-subcommand interactive launches', () => {
     const out = appendThirdPartyWebSearchToolArgs(['fix the bug']);
     expect(out).toContain('--append-system-prompt');