[codex] Add reviewable Auto Link workflow

[nan-doctor]

Overview

Adds a reviewable Auto Link workflow to the wiki reader so suggested wikilinks can be inspected before any file is changed.

Main changes

• Split wikilink discovery and application into separate suggestion/apply APIs while preserving the existing automatic enrichment entry point.
• Build and validate a page catalog, recall alternative targets, and rank suggestions into High, Medium, and Low confidence bands.
• Add a reader toolbar action and review dialog with default selection for high-confidence suggestions, target alternatives, per-term/per-target ignore actions, and explicit apply/cancel controls.
• Persist project-scoped ignore rules and guard review mutations against stale file or project state.
• Avoid duplicate/overlapping links and terms that already fall inside existing wikilinks.
• Add the Auto Link design specification and focused automated coverage.

Validation

• npm run typecheck
• npx vitest run src/lib/enrich-wikilinks.test.ts src/lib/enrich-wikilinks.scenarios.test.ts src/lib/page-catalog.test.ts src/lib/auto-link-ignore.test.ts src/lib/auto-link-candidates.test.ts src/lib/auto-link-review-state.test.ts src/lib/auto-link-review.test.ts
  • 7 test files passed
  • 87 tests passed
• Manually verified in the Tauri desktop app: the Auto Link action is visible, opens the review dialog, presents confidence-banded suggestions, and can be cancelled without writing.