update /theme to new slash command arch (#3791)

Co-authored-by: matt korwel <matt.korwel@gmail.com>
Co-authored-by: Abhi <43648792+abhipatel12@users.noreply.github.com>

packages/cli/src/services/CommandService.test.ts

@@ -10,6 +10,7 @@ import { type SlashCommand } from '../ui/commands/types.js';
 import { memoryCommand } from '../ui/commands/memoryCommand.js';
 import { helpCommand } from '../ui/commands/helpCommand.js';
 import { clearCommand } from '../ui/commands/clearCommand.js';
+import { themeCommand } from '../ui/commands/themeCommand.js';
 
 // Mock the command modules to isolate the service from the command implementations.
 vi.mock('../ui/commands/memoryCommand.js', () => ({
@@ -21,6 +22,9 @@ vi.mock('../ui/commands/helpCommand.js', () => ({
 vi.mock('../ui/commands/clearCommand.js', () => ({
   clearCommand: { name: 'clear', description: 'Mock Clear' },
 }));
+vi.mock('../ui/commands/themeCommand.js', () => ({
+  themeCommand: { name: 'theme', description: 'Mock Theme' },
+}));
 
 describe('CommandService', () => {
   describe('when using default production loader', () => {
@@ -46,25 +50,26 @@ describe('CommandService', () => {
         const tree = commandService.getCommands();
 
         // Post-condition assertions
-        expect(tree.length).toBe(3);
+        expect(tree.length).toBe(4);
 
         const commandNames = tree.map((cmd) => cmd.name);
         expect(commandNames).toContain('memory');
         expect(commandNames).toContain('help');
         expect(commandNames).toContain('clear');
+        expect(commandNames).toContain('theme');
       });
 
       it('should overwrite any existing commands when called again', async () => {
         // Load once
         await commandService.loadCommands();
-        expect(commandService.getCommands().length).toBe(3);
+        expect(commandService.getCommands().length).toBe(4);
 
         // Load again
         await commandService.loadCommands();
         const tree = commandService.getCommands();
 
         // Should not append, but overwrite
-        expect(tree.length).toBe(3);
+        expect(tree.length).toBe(4);
       });
     });
 
@@ -76,8 +81,13 @@ describe('CommandService', () => {
         await commandService.loadCommands();
 
         const loadedTree = commandService.getCommands();
-        expect(loadedTree.length).toBe(3);
-        expect(loadedTree).toEqual([clearCommand, helpCommand, memoryCommand]);
+        expect(loadedTree.length).toBe(4);
+        expect(loadedTree).toEqual([
+          clearCommand,
+          helpCommand,
+          memoryCommand,
+          themeCommand,
+        ]);
       });
     });
   });