fix(ci): stabilize TUI cwd-abbreviation and skill-catalog test expectations

Two CI-only test failures on the personal TUI/skills stack:

- packages/ui/tui/tests/tui.spec.ts anchored the dark-palette test at
  process.cwd(), which is not guaranteed under $HOME; on CI runners the
  prompt rendered an absolute path instead of the `~/` abbreviation. Anchor
  cwd under homedir() so the assertion is deterministic.
- examples/tui-agent/tests/tui-keyless-smoke.e2e.ts asserted stale
  dsh-customize / dsh-upgrade skill descriptions. Sync the expectations to
  the bundled SKILL.md frontmatter.

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

@@ -4150,9 +4150,11 @@ describe('terminal mounting', () => {
       }
     }
     const terminal = new QueryFailTerminal()
+    // Anchor cwd under $HOME so the prompt renders the `~/` abbreviation
+    // deterministically; process.cwd() is not guaranteed under $HOME in CI.
     const result = await createTuiTestHarness(terminal, vi.fn(), {
       config: { theme: { color: true } },
-      cwd: process.cwd(),
+      cwd: join(homedir(), 'projects', 'dsh-tui'),
     })
     await tick()
     expect(terminal.output).toContain('\x1b[94m~/')