[Agent] Docs / shortcut conflicts with Shift+/

Agent brief

Category: a11y | Severity: low | Effort: XS

Problem

Docs search registers / shortcut globally; conflicts with Shift+/ (?) in some browsers and with typing in other fields without capture guard.

Files

• src/components/docs/docs-search-input.tsx

Acceptance criteria

• / only focuses search when not in input/textarea
• Document shortcut in placeholder or help text
• No conflict with browser find shortcuts