v0.13 baseline · git 初始化 + 仓库瘦身

把所有本地 demo / 测试 / 上传图 / 调试脚本搬入 local-tests/，写
.gitignore 忽略整个测试目录与 node_modules/。本次起 skill 仓库
只跟踪：SKILL.md / HANDOFF.md / PRODUCT.md / assets/（3 模板）/
references/（15 规则文档）/ agents/openai.yaml / validate-social-deck.mjs
/ package.json + lock。

历次版本（v0.1-v0.12）的全部实质改动已包含在当前文件状态中——
HANDOFF.md 的版本历史段保留作为时间轴文字记录，但代码层面以
此 commit 为唯一基线，后续逐次 commit 对应 HANDOFF.md 新增段落。

HANDOFF/PRODUCT/category-cookbook/components/style-system 中的
demo 路径引用已加 local-tests/ 前缀。SKILL.md Step 5 line 190 的
'social-card-<slug>/' 是下游用户工作区的命名约定，未改动。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

references/portrait-fill.md

@@ -0,0 +1,85 @@
+# Portrait Fill Rules
+
+3:4 social images have much more vertical space than a horizontal PPT slide. A layout that works in 16:9 often becomes a thin strip in 3:4. Solve that at the planning stage.
+
+## Vertical Zones
+
+Think of a 1080x1440 Rednote image as five zones:
+
+| Zone | Typical Height | Role |
+| --- | --- | --- |
+| Header/meta | 56-90px | issue label, category, page |
+| Title/lead | 240-420px | hook and claim |
+| Evidence/body | 520-760px | image, ledger, diagram, comparison |
+| Bottom strip | 90-180px | captions, checklist, summary |
+| Footer | 52-86px | issue/page metadata |
+
+Not every page needs all five, but every page needs an intentional vertical composition.
+
+## Underfilled Page Smells
+
+Revise if:
+
+- A table or ledger occupies less than 45% of the canvas height.
+- The lower 25% of the page is empty without being an atmospheric hero page.
+- Four list items are rendered as short rows with large blank space below.
+- A screenshot is small even though it is the evidence.
+- Body copy is centered in the middle with no top/bottom rhythm.
+
+## Fixes For Thin Tables
+
+When a table is too short:
+
+1. Increase row height to 118-170px.
+2. Add a left marginal column with large numbers, keywords, or category labels.
+3. Add a pull quote column beside the table.
+4. Add a top or bottom issue strip with 2-3 consequences.
+5. Convert the table to M08 Tall Ledger.
+6. If there are only 2-3 points, use M04 Pull Quote or M09 Atmospheric Thesis instead of a table.
+
+## Fixes For Sparse Text
+
+If a page has only one core sentence:
+
+- Use M09 Atmospheric Thesis with visible WebGL/ink background.
+- Make the sentence the hero, not a small paragraph.
+- Add one small source/context row.
+- Use dark/ink page if the package needs rhythm.
+
+## Fixes For Screenshot Pages
+
+If screenshot content matters:
+
+- Give it 45%-65% of the page height.
+- Put only one key sentence above it.
+- Use a bottom caption band instead of a side paragraph.
+- Crop carefully; preserve readable UI labels.
+
+## Page Rhythm
+
+For a 7-page Rednote set, use at least 5 distinct shapes:
+
+- Cover / feature image.
+- Essay split.
+- Tall ledger.
+- Evidence screenshot.
+- Pull quote or atmospheric thesis.
+- Checklist/comparison.
+- Closing note.
+
+Avoid repeating `title + lead + 3 rows` more than twice in one set.
+
+## Minimum Occupancy
+
+As a rough rule, the active composition should occupy at least 78% of the page height.
+
+This can include:
+
+- Large type.
+- Images/screenshots.
+- Ledger rows.
+- Background atmosphere on hero pages.
+- Caption bands.
+- Marginalia columns.
+
+Whitespace is good only when it is designed. Empty leftover space is not.