chore: seal Design Vision v1 and monorepo scaffold

Archive the differentiated YuXinGu product docs, AI engineering system,
design contract, and Go/Vue scaffold. Next execution prioritizes Cece-parity
over early innovation (see .ai/product/STRATEGY.md).

Co-authored-by: Cursor <cursoragent@cursor.com>

.ai/design/component-catalog.md

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+# Component Catalog — AI Contract
+
+Agents MUST check this file + platform `components/` before creating UI.
+
+Naming: PascalCase; domain words from `.ai/domain.md`.  
+Visual tokens: [design-system.md](design-system.md).  
+Ship path today: `apps/user-h5/src/components/` (Vue). Mini Program / Flutter map 1:1 by name.
+
+Status: `exists` | `required` (build when first needed) | `future`
+
+---
+
+## Primitives
+
+### Button
+
+Status: **required**
+
+Types ONLY: `Primary` · `Secondary` · `Ghost` · `Danger` · `Loading` · `Disabled`
+
+| Prop | Notes |
+|---|---|
+| variant | primary / secondary / ghost / danger |
+| loading | shows progress; blocks double submit |
+| disabled | uses `--color-primary-disabled` or neutral |
+| block | full width on H5 forms |
+
+MUST NOT: `SpecialButton`, `CustomButton2`, one-off gradient buttons outside Primary.
+
+Primary visual: pill + brand CTA gradient from design-system.
+
+### IconTile
+
+Status: **required**
+
+Square/rounded tile for Explore / Home grid. Soft accent bg + symbol (△ ◆ ☯ 问), not emoji.
+
+### Avatar
+
+Status: **required**
+
+Profile face placeholder (initials or soft color). Sizes: sm 32 / md 40 / lg 56.
+
+### Tag / Chip
+
+Status: **required**
+
+Filter chips, Soft labels. Active = white surface + primary text + light shadow.
+
+### Divider
+
+Status: **required** — `--color-border`, 1px.
+
+### Skeleton
+
+Status: **required** — list/card placeholders; calm pulse ≤300ms feel, no flashy shimmer rainbow.
+
+### Toast / Banner
+
+Status: **required** — success / error / info. Short copy; no fear wording.
+
+---
+
+## Layout chrome
+
+### AppShell
+
+Status: **exists** (TabBar + max-width column)
+
+User column `max-width: var(--layout-max-user)`. Safe-area bottom padding.
+
+### TabBar
+
+Status: **exists**
+
+Tabs: 首页 / 探索 / **问** / 陪伴 / 我的. Center Ask may use primary circle. Active = primary.
+
+### TopBar
+
+Status: **required**
+
+Secondary pages: back · title · optional action. Soft wash or white; not heavy app bar.
+
+### ContentSheet
+
+Status: **required**
+
+White rounded sheet over peach wash (home feed pattern).
+
+---
+
+## Forms
+
+### TextField / DateField
+
+Status: **required**
+
+Label required · error · disabled · focus border soft primary. Birthday Decode uses compact year/month/day fields.
+
+### FormSection
+
+Status: **required** — label + control + helper/error.
+
+Rules: Label, error, loading, disabled states always.
+
+---
+
+## Cards
+
+### Card (base)
+
+Status: **required**
+
+Structure: Container → Padding (`--spacing-md`) → Content → Optional Action.  
+Surface white, `--radius-lg`, `--shadow-card`. No random card skins.
+
+### FeatureCard
+
+Status: **required** — Explore entry (icon + title + one line).
+
+### ReportCard
+
+Status: **required**
+
+Decode / Match summary. Shows free conclusion; locked sections use PaywallLock. Footer disclaimer slot.
+
+### MoodCard
+
+Status: **required** — Companion daily mood entry/result. Soft, never clinical.
+
+### SolarTermCard
+
+Status: **required** — Today’s SolarTerm title + short lifestyle tip (no 吉凶).
+
+### SubscriptionCard
+
+Status: **required**
+
+Membership plans. Clear price · period · benefits. **MUST NOT** fake countdown / dark patterns. CTA = Primary Button.
+
+### UnlockCard
+
+Status: **required** — single Report / Match Unlock alternative to VIP.
+
+---
+
+## AI / Ask
+
+### ChatThread
+
+Status: **required** — scrollable Ask history; Profile context chip at top (Self / Other switch).
+
+### ChatBubble
+
+Status: **required**
+
+User vs AI. AI bubble: soft surface, calm radius; no neon bot skins. Streaming = typing/skeleton, not decorative bounce spam.
+
+### AIMessage
+
+Status: **required**
+
+Structured Ask answer: short answer · optional bullets · disclaimer when health-adjacent. Prefer structured blocks over wall of text.
+
+### PromptChip
+
+Status: **required** — suggested follow-ups under Ask input; path-aware (性格 / 关系 / 养生), never 运势.
+
+### AskInputBar
+
+Status: **required** — bottom composer; ≥44px hit; send loading state.
+
+---
+
+## Profile & social
+
+### ProfileSwitcher
+
+Status: **required** — Self / Other list; “帮 TA 测” entry.
+
+### ShareCard
+
+Status: **required** — Decode / ScaleResult share visual; brand + one conclusion line; no medical claims.
+
+### ScaleQuestion / ScaleResultView
+
+Status: **required** — progress · options · result type + CTA to Decode/Ask.
+
+---
+
+## Commerce
+
+### PaywallLock
+
+Status: **required** — blurred/locked reason+plan; CTA Unlock or Membership.
+
+### OrderSummary
+
+Status: **required** — plan/report line items before pay-mock.
+
+---
+
+## States
+
+### EmptyState
+
+Status: **required** — one sentence + one action.
+
+### ErrorState
+
+Status: **required** — message + retry/back.
+
+### LoadingBlock
+
+Status: **required** — page/section skeleton wrapper.
+
+---
+
+## Forbidden inventions
+
+Without approval / catalog update:
+
+- Parallel button systems
+- “Glassmorphism” chat skins
+- Emoji-only navigation
+- New layout shells beside AppShell
+- Countdown / guilt paywalls
+
+---
+
+## Extension rule
+
+Need a new component → add a row here (name, status, props, do/don’t) in the **same PR** as the first implementation. Then build under platform `components/`.