Mention AI features in README's Overview and Features sections

[danibsheehan]

Summary

The AI layer (search, summarize, related pages, usage indicator) was only documented in the "Deploy musing-ai-service" setup section, ~180 lines into the README — a reader browsing Overview/Features top-to-bottom would never learn it exists. `readme.mdc` requires Features to reflect shipped UI, and this has been live and merged since #94/#95.

• Overview: one new paragraph, matching the existing Supabase-sync paragraph's style — optional, additive, points to the existing deploy section.
• Features: one new bullet alongside the Supabase-sync bullet.

Test plan

• `check_stack_docs.py`, `npm run format:check` — pass
• Docs-only change

🤖 Generated with Claude Code

[github-actions]

PR guide

Auto-generated from changed paths. Fill in Summary and How to verify in the PR description above.

Touches: docs / agent guidance

Diff: 1 file changed, 4 insertions(+), 1 deletion(-)

Suggested verify

• N/A - docs/tooling only; confirm locally if anything user-facing changed

Checklist (applies to this PR)

• No unintended secrets or local-only config committed

Reviewer focus

• Scope looks docs- or tooling-only; confirm there is no hidden runtime impact

Commits

• d16d484 Mention AI features in README's Overview and Features sections

Files by area

Area	Files
docs / agent guidance	1

CI

Primary check: CI runs lint, Prettier format check, Vitest coverage, and build for every PR. Coverage tables are posted separately.

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Template: pull_request_template.md

[github-actions]

Unit tests (Vitest)

File	Coverage	Lines	Branches
All files	55%	63%	48%	✅
src/components/DatabaseEmbedNodeView.tsx	0%	0%	0%	✅
src/components/DatabaseTableView.tsx	0%	0%	0%	✅
src/components/SidebarSearch.tsx	63%	76%	51%	✅
src/components/SlashMenu.tsx	72%	85%	60%	✅
src/context/WorkspaceContext.tsx	25%	35%	14%	✅
src/extensions/blockIdOnBlocks.ts	75%	100%	50%	✅
src/extensions/musingDatabaseEmbed.ts	70%	90%	50%	✅
src/extensions/singleTopLevelBlock.ts	80%	100%	60%	✅
src/hooks/usePageIndexing.ts	95%	90%	100%	✅
src/lib/aiClient.ts	81%	86%	76%	✅
src/lib/blockEditorCommands.ts	42%	50%	35%	✅
src/lib/blockPlainText.ts	55%	60%	50%	✅
src/lib/editorBlockText.ts	13%	13%	14%	✅
src/lib/emojiSuggestionItems.ts	93%	100%	87%	✅
src/lib/htmlToDocx.ts	24%	31%	18%	✅
src/lib/pageToExportHtml.ts	97%	100%	94%	✅
src/lib/resolveWikiPage.ts	91%	100%	83%	✅
src/lib/slashMenuOptions.ts	57%	57%	0%	✅
src/lib/themePreference.ts	32%	25%	40%	✅
src/lib/workspaceStorage.ts	80%	81%	80%	✅
src/lib/pageDocument/blockGutterOps.ts	92%	100%	84%	✅
src/lib/pageDocument/blockIdAtSelection.ts	83%	100%	66%	✅
src/lib/pageDocument/lastBlockNeedsBelowHit.ts	91%	100%	83%	✅
src/lib/pageDocument/serializeDocToBlocks.ts	58%	69%	47%	✅
src/lib/pageDocument/slashMenuDeleteRange.ts	82%	95%	70%	✅
src/lib/pageDocument/tryDeleteEmptyTopLevelBlock.ts	87%	94%	81%	✅

Minimum allowed coverage is 0%

Generated by 🐒 cobertura-action against d16d484