Point passive skill awareness at active runtime

[mega123-art]

Summary

• read installed skills from the active runtime directory instead of always Claude's dir
• include the concrete Claude/Codex SKILL.md path in the managed awareness block
• update the unit test to verify Codex reads ~/.codex/skills separately

Verification

• pnpm --filter @iqlabs-official/agent-sdk exec tsc --noEmit
• pnpm --filter @iqlabs-official/agent-sdk exec vitest run src/memory/skillsSection.spec.ts

Split out of #56 per review feedback.

[zo-sol]

Thanks @mega123-art — great change. Making the skills block read the active runtime's dir (~/.codex/skills vs ~/.claude/skills) and pointing the memory line at the matching SKILL.md path is exactly right, so the agent only reaches for skills the running engine can load.

I cherry-picked the core of this onto main in c1a9f85 (with you as co-author), keeping your skillsSection.ts + spec as-is (specs pass). I took only the core file rather than merging the branch because this PR predates the market RPC refactor on main (3b6b601) and the dispose/re-equip work (#60) — a full merge would have silently reverted the attachMarketHandlers extraction (verified via a trial merge: attachMarketHandlers count → 0). The webview-side bits here are superseded by what's already on main.

Closing as cherry-picked into main. Really appreciate it — credit's on the commit. 🙏