feat: salvage frontend design guidance (#1816)

docs/stale-pr-salvage-ledger.md

@@ -44,6 +44,7 @@ on fresh branches, and credit the source PR.
 | #1566 | Agent architecture audit skill | Salvaged in #1772. |
 | #1578 | OpenCode file-probe hardening | Salvaged in #1773. |
 | #1603 | `plan-orchestrate` skill | Salvaged in #1766 with current manifest/catalog wiring. |
+| #1659 | Frontend design direction and interface-polish skills | Salvaged in the May 12 frontend-design maintainer pass with canonical `skills/` layout and current ECC frontend guidance, while preserving the repo guardrail that the official `frontend-design` skill should be installed from `anthropics/skills`. |
 | #1674 | Production audit skill | Salvaged in #1732 after supply-chain/privacy review and rewrite. |
 | #1687 | zh-CN localization sync | Large safe subsets salvaged in #1746-#1752; remaining pieces require translator/manual review. |
 | #1694 | Portfolio curation | Useful focused curation updates salvaged in #1723 and #1724. |
@@ -86,6 +87,8 @@ porting.
 | #1318 | Gemini agent adaptation utility was already present on current `main`. |
 | #1323 | Hook config update was already present on current `main`. |
 | #1337 | Catalog count update was superseded by current catalog-count sync. |
+| #1608 | Unsafe dashboard document/terminal open handling was already present on current `main` through safe runtime helpers and project-bound document opening. |
+| #1678 | Windows MCP `.cmd`/`.bat` fallback behavior was already present on current `main` with current health-check tests. |
 | #1682/#1701 | Strategic compact hook-path fixes were merged directly or superseded by current docs fixes. |
 | JARVIS #4/#5/#6 | Stale failing dependency-only PRs; future dependency state should be regenerated by Dependabot. |