Companion: wire real Lottie assets — the always-sleeping cat

- LottiePlayer now auto-crops each asset to its content bbox (union getBBox
  across 6 frames -> square viewBox), so stock files with empty artboard
  padding fill the badge instead of floating tiny in the middle.
- Wire sleeping-cat.json to every mood: she's always asleep in the corner yet
  still mumbles tips and cheers through the bubble. napping hardcoded true so
  she keeps the calm sway + drifting zzz even while "talking".
- happy-dog.json parked in the folder as an awake-mascot alternate.
- Enable resolveJsonModule for the JSON imports.

Claude-Session: https://claude.ai/code/session_016Yr6jELuRc7hyzYLccQKZd

BUILD_PLAN.md

@@ -65,7 +65,7 @@ Multi-session build. **Source of truth for what's done and what's next.** Update
 - [x] Shape language, shadows, transitions — `--radius-*`, `--shadow-soft`, global `200ms ease` on interactive elements
 - [x] Signature animations (suggestion fade-float, accept confetti, breathing checkpoint dot) — fade-float + breathing dot already live; **accept confetti** added this phase: CSS-only 4-dot burst (`petal-confetti`/`@keyframes petal-confetti`, direction via `--dx`/`--dy` inline), spawned in `EditorCore.handleAccept` at the card position, auto-cleared after 720ms
 - [x] Distraction-free mode — entered on editor focus (`EditorCore` `onFocus` → `App.setFocusMode`), the doc-list sidebar slides left + collapses to 0 width (`.petal-sidebar`/`.petal-sidebar-hidden`, 280ms), editor canvas re-centers full-width. Restored by Escape or a pointer-down outside the centered canvas (gutters, header, status bar via `handleChromeDown` + `canvasRef` containment check)
-- [x] **Companion kitten** (`web/src/components/Companion/`) — cozy corner mascot that reacts to the writing session. `useCompanion` is the library-agnostic behavior engine (cheers on accept/milestones, Mandarin-first writing tips, screen-break reminders after a long stretch, idle naps + welcome-back); `PetalCompanion` renders the kitten + a CJK-first speech bubble (zh prominent, en subtitle — Note #17). Animation via `lottie-web/build/player/lottie_light` (offline, no eval/CDN) behind a `LottiePlayer` wrapper; **emoji placeholder per mood until a Lottie asset is dropped into `animations/index.ts`** (the single swap seam). App feeds it `editTick`/`acceptTick` counters + `wordCount`/`saveStatus`. All copy bilingual in `tips.ts`.
+- [x] **Companion mascot** (`web/src/components/Companion/`) — cozy corner mascot that reacts to the writing session. `useCompanion` is the library-agnostic behavior engine (cheers on accept/milestones, Mandarin-first writing tips, screen-break reminders after a long stretch, idle naps + welcome-back); `PetalCompanion` renders it + a CJK-first speech bubble (zh prominent, en subtitle — Note #17). Animation via `lottie-web/build/player/lottie_light` (offline, no eval/CDN) behind a `LottiePlayer` wrapper that **auto-crops the asset to its content bbox** (unions getBBox across 6 frames → square viewBox) so stock files with empty artboard padding fill the badge. **Real asset wired: `animations/sleeping-cat.json`** — every mood maps to the same sleeping-cat loop, so she's *always* asleep in the corner yet still mumbles tips/cheers through the bubble (a deliberate gag the user loved). `napping` is hardcoded true in `PetalCompanion` so she keeps the calm sway + drifting zzz even while talking. A `happy-dog.json` (also pure vector) is kept in the folder as an awake-mascot option. `animations/index.ts` is the single swap seam. App feeds it `editTick`/`acceptTick` + `wordCount`/`saveStatus`. All copy bilingual in `tips.ts`. (`resolveJsonModule` enabled in tsconfig for the JSON import.)
 
 ### Phase 7 — Spell check
 - [ ] nspell browser-side (en-US), vendor dictionaries