refactor(acp): delegate prompt turn processing logic to GeminiClient (#26222)

packages/cli/src/config/config.test.ts

@@ -3988,7 +3988,7 @@ describe('loadCliConfig acpMode and clientName', () => {
     expect(config.getClientName()).toBe('acp-vscode');
   });
 
-  it('should set acpMode to true but leave clientName undefined for generic terminals', async () => {
+  it('should set acpMode to true and set clientName to acp for generic terminals', async () => {
     process.argv = ['node', 'script.js', '--acp'];
     vi.stubEnv('TERM_PROGRAM', 'iTerm.app'); // Generic terminal
     vi.stubEnv('VSCODE_GIT_ASKPASS_MAIN', '');
@@ -4000,10 +4000,10 @@ describe('loadCliConfig acpMode and clientName', () => {
       argv,
     );
     expect(config.getAcpMode()).toBe(true);
-    expect(config.getClientName()).toBeUndefined();
+    expect(config.getClientName()).toBe('acp');
   });
 
-  it('should set acpMode to false and clientName to undefined by default', async () => {
+  it('should set acpMode to false and clientName to tui by default', async () => {
     process.argv = ['node', 'script.js'];
     const argv = await parseArguments(createTestMergedSettings());
     const config = await loadCliConfig(
@@ -4012,6 +4012,6 @@ describe('loadCliConfig acpMode and clientName', () => {
       argv,
     );
     expect(config.getAcpMode()).toBe(false);
-    expect(config.getClientName()).toBeUndefined();
+    expect(config.getClientName()).toBe('tui');
   });
 });

packages/cli/src/config/config.ts

@@ -931,7 +931,13 @@ export async function loadCliConfig(
       (ide.name !== 'vscode' || process.env['TERM_PROGRAM'] === 'vscode')
     ) {
       clientName = `acp-${ide.name}`;
+    } else {
+      clientName = 'acp';
     }
+  } else if (argv.isCommand) {
+    clientName = 'cli-command';
+  } else {
+    clientName = 'tui';
   }
 
   // TODO(joshualitt): Clean this up alongside removal of the legacy config.