fix(tui): bind provider as model alias

ui-tui/src/app/slash/commands/session.ts

@@ -58,6 +58,7 @@ export const sessionCommands: SlashCommand[] = [
 
   {
     help: 'change or show model',
+    aliases: ['provider'],
     name: 'model',
     run: (arg, ctx) => {
       if (ctx.session.guardBusySessionSwitch('change models')) {

ui-tui/src/app/slash/commands/setup.ts

@@ -5,18 +5,6 @@ import { runExternalSetup } from '../../setupHandoff.js'
 import type { SlashCommand } from '../types.js'
 
 export const setupCommands: SlashCommand[] = [
-  {
-    help: 'configure LLM provider + model (launches `hermes model`)',
-    name: 'provider',
-    run: (_arg, ctx) =>
-      void runExternalSetup({
-        args: ['model'],
-        ctx,
-        done: 'provider updated — starting session…',
-        launcher: launchHermesCommand,
-        suspend: withInkSuspended
-      })
-  },
   {
     help: 'run full setup wizard (launches `hermes setup`)',
     name: 'setup',