feat(guides): add mana guides app — step-by-step playbook app

New app at apps/guides/ with local-first architecture (Dexie.js + mana-sync).

- 5 collections: guides, sections, steps, collections, runs
- Library view: card grid with search, category & difficulty filters
- Guide detail: sections/steps overview, start-run buttons
- Run mode: scroll (all steps) + focus (one step at a time) with note support
- Collections view: learning paths with progress bars
- History view: all runs with timestamps and duration
- Guest seed: 3 demo guides (dev setup, pasta recipe, git basics)
- GuideCard with run-status indicator (○◑●⟳)
- GuideEditModal with emoji, color, difficulty, tags
- Registered in shared-branding: port 5200, teal #0d9488, guides.mana.how
- Plan doc: .claude/plans/mana-guides.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -134,6 +134,11 @@
 		"dev:calc:web": "pnpm --filter @calc/web dev",
 		"dev:calc:app": "pnpm dev:calc:web",
 		"dev:calc:full": "concurrently -n auth,sync,web -c blue,magenta,cyan \"pnpm dev:auth\" \"pnpm dev:sync\" \"pnpm dev:calc:web\"",
+		"guides:dev": "turbo run dev --filter=guides...",
+		"dev:guides:web": "pnpm --filter @guides/web dev",
+		"dev:guides:app": "pnpm dev:guides:web",
+		"dev:guides:local": "concurrently -n sync,web -c magenta,cyan \"pnpm dev:sync\" \"pnpm dev:guides:web\"",
+		"dev:guides:full": "concurrently -n auth,sync,web -c blue,magenta,cyan \"pnpm dev:auth\" \"pnpm dev:sync\" \"pnpm dev:guides:web\"",
 		"moodlit:dev": "turbo run dev --filter=moodlit...",
 		"dev:moodlit:mobile": "pnpm --filter @moodlit/mobile dev",
 		"dev:moodlit:app": "concurrently -n server,web -c yellow,cyan \"pnpm dev:moodlit:server\" \"pnpm dev:moodlit:web\"",