调整skills的位置

.codex/skills/hallmark/references/components/n4-hidden-behind-k.md

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+### N4 · Hidden behind ⌘K
+No visible nav. The user opens a command palette via `⌘K` to get anywhere. Designed for keyboard-first audiences.
+*Use when:* the page is for technical users who expect this affordance.
+*Don't confuse with:* N2 Floating chip (which is visible always).
+
+```html
+<button class="kbd-hint">⌘ K</button>
+<dialog class="palette">…</dialog>
+```