feat(tui): add versioned first-run welcome

packages/ui/tui/tests/extension.spec.ts

@@ -20,6 +20,7 @@ import {
 
 const theme: TuiTheme = Object.freeze({
   text: (value: string) => `text:${value}`,
+  brand: (value: string) => `brand:${value}`,
   muted: (value: string) => `muted:${value}`,
   dim: (value: string) => `dim:${value}`,
   accent: (value: string) => `accent:${value}`,

packages/ui/tui/tests/tui.spec.ts

@@ -41,7 +41,7 @@ import {
   type TuiRuntime,
 } from '../src/index.ts'
 import { WorkspaceFileSearch } from '../src/chat/file-autocomplete.ts'
-import { ATTRIBUTE_ROLES, COLOR_ROLES, paletteSpec } from '../src/components/theme.ts'
+import { ATTRIBUTE_ROLES, brandText, COLOR_ROLES, paletteSpec } from '../src/components/theme.ts'
 import {
   appendAssistant,
   appendUser,
@@ -4993,6 +4993,7 @@ describe('TUI extension service', () => {
                 host.theme.accent(`${label} plugin overlay`),
                 [
                   host.theme.text('text'),
+                  host.theme.brand('brand'),
                   host.theme.dim('dim'),
                   host.theme.success('success'),
                   host.theme.warning('warning'),
@@ -5370,6 +5371,10 @@ describe('terminal mounting', () => {
     await dispose(result)
   })
 
+  it('uses the official DeepSeek SVG ink for truecolor brand art', () => {
+    expect(brandText('mark')).toBe('\x1b[38;2;77;107;254mmark\x1b[39m')
+  })
+
   it('detects a light terminal color scheme and switches the scheme-dependent code role', async () => {
     const result = await setup({ config: { theme: { color: true } } })
     // `dim` is scheme-independent (SGR 2 over the default foreground), so the