fix: surface search hit titles in recall injections

[ayushsingh82]

Summary

• resultText()/formatRecall() in recall-directive.js rendered memory/chunk text and filepath but dropped the title field the API already returns on search hits — the only thing distinguishing similar-looking results.
• Recalled lines now prefix with Title: when a title is present, matching the format used before the CLI-free restructure.

Ports the idea from #88 (closed as stale after the #71 refactor removed plugin/scripts/), reopened as #94.

Test plan

• node --test test/unit.mjs — all 23 tests pass, including an added assertion covering a titled search hit

[ayushsingh82]

@Dhravya PR is up — resubmitting the recall-title idea from #88 against the new CLI-free architecture, closes #94.

[ayushsingh82]

@Dhravya heads up — the claude-review job is failing with "Could not fetch an OIDC token", not because of anything in this diff. That's GitHub Actions restricting id-token/secrets on pull_request-triggered runs from forks; the workflow's id-token: write permission doesn't apply to fork PRs. Might be worth switching that job to pull_request_target (with the usual checkout-pin caution) or gating it behind a maintainer-triggered event if you want it to run on external contributions.