feat(tui): add unified command parser with model switching

src/frontends/tui/commands.test.ts

@@ -0,0 +1,60 @@
+import { describe, it, expect } from 'vitest';
+import { parseCommand, getHelpText } from './commands.js';
+
+describe('parseCommand', () => {
+  it('parses /quit command', () => {
+    expect(parseCommand('/quit')).toEqual({ type: 'quit' });
+    expect(parseCommand('/exit')).toEqual({ type: 'quit' });
+  });
+
+  it('parses /reset command', () => {
+    expect(parseCommand('/reset')).toEqual({ type: 'reset' });
+    expect(parseCommand('/clear')).toEqual({ type: 'reset' });
+  });
+
+  it('parses /help command', () => {
+    expect(parseCommand('/help')).toEqual({ type: 'help' });
+    expect(parseCommand('/?')).toEqual({ type: 'help' });
+  });
+
+  it('parses /status command', () => {
+    expect(parseCommand('/status')).toEqual({ type: 'status' });
+  });
+
+  it('parses /fullscreen command', () => {
+    expect(parseCommand('/fullscreen')).toEqual({ type: 'fullscreen' });
+    expect(parseCommand('/fs')).toEqual({ type: 'fullscreen' });
+  });
+
+  it('parses /model command without argument', () => {
+    expect(parseCommand('/model')).toEqual({ type: 'model' });
+  });
+
+  it('parses /model command with argument', () => {
+    expect(parseCommand('/model local')).toEqual({ type: 'model', name: 'local' });
+    expect(parseCommand('/model opus')).toEqual({ type: 'model', name: 'opus' });
+  });
+
+  it('parses /transfer command', () => {
+    expect(parseCommand('/transfer telegram')).toEqual({ type: 'transfer', target: 'telegram' });
+  });
+
+  it('parses regular message', () => {
+    expect(parseCommand('Hello Flynn')).toEqual({ type: 'message', content: 'Hello Flynn' });
+  });
+
+  it('returns null for empty input', () => {
+    expect(parseCommand('')).toBeNull();
+    expect(parseCommand('   ')).toBeNull();
+  });
+});
+
+describe('getHelpText', () => {
+  it('returns help text with all commands', () => {
+    const help = getHelpText();
+    expect(help).toContain('/help');
+    expect(help).toContain('/model');
+    expect(help).toContain('/reset');
+    expect(help).toContain('/quit');
+  });
+});