feat: 迁移统一目录元数据契约 (#102)

## 中文

- 为 System Agent、34 个 Builtin Skill、28 个 Pointer/Collection 条目增加 catalog
sidecar
- 覆盖 147 个 collection child，并固定可证明的来源；无法证明的内容保持 listing-only/unknown
- 增加 strict Schema、validator、collection check 与 CI 完整性门禁

## English

- Add catalog metadata sidecars for the System Agent, 34 built-in
Skills, and 28 pointer/collection entries
- Cover 147 collection children while keeping unverifiable facts
listing-only or unknown
- Add strict schemas, validators, deterministic collection checks, and
CI completeness gates

## 验证 / Verification

- Catalog validator 17/17
- Collection generator 4/4
- 63 sidecars, 147 children, zero errors

skills/presentation-forge/catalog-metadata.v1.json

@@ -0,0 +1,89 @@
+{
+  "$schema": "../../schemas/catalog-metadata.v1.schema.json",
+  "schemaVersion": 1,
+  "identity": {
+    "kind": "skill",
+    "id": "presentation-forge"
+  },
+  "presentation": {
+    "defaultLocale": "en-US",
+    "i18n": {
+      "zh-CN": {
+        "name": "Presentation Forge",
+        "summary": "中文 toB 商业汇报 PPT 工作流：整页生图、图片页重建为可编辑 PPTX/SVG、原生模板填充，适配 Codex/Claude Code",
+        "description": "面向中文 toB 商业汇报的 PPT 工作流，支持整页生图、把截图或图片型幻灯片重建为可编辑 PPTX/SVG，或用原生 PPTX 模板直接填充新内容。制作售前方案、项目汇报、产品介绍、行业分析、培训材料，或图片页转可编辑 PowerPoint 时使用。"
+      },
+      "en-US": {
+        "name": "Presentation Forge",
+        "summary": "Chinese toB business-presentation workflow — image decks, rebuild slides into editable PPTX/SVG, native template filling",
+        "description": "Chinese toB business-presentation workflow: full-page image decks, rebuilding image/screenshot slides into editable PPTX/SVG, and native PPTX template filling. Use for pre-sales decks, project reports, product intros, industry analysis, training material, or image-to-editable PowerPoint. The skill body is authored in Chinese, so the en-US locale intentionally falls back to the shared body and is locked as human-maintained."
+      }
+    },
+    "category": "creative",
+    "tags": [
+      "ppt",
+      "pptx",
+      "svg",
+      "presentation",
+      "slides"
+    ]
+  },
+  "release": {
+    "state": "known",
+    "version": "0.1.0",
+    "versionScheme": "semver"
+  },
+  "timestamps": {
+    "catalogUpdatedAt": {
+      "state": "known",
+      "value": "2026-08-23T15:31:26Z",
+      "precision": "second"
+    },
+    "releasePublishedAt": {
+      "state": "unknown"
+    },
+    "reviewedAt": {
+      "state": "unknown"
+    },
+    "upstreamObservedAt": {
+      "state": "known",
+      "value": "2026-08-10T13:30:00Z",
+      "precision": "second"
+    }
+  },
+  "provenance": {
+    "content": {
+      "kind": "git",
+      "url": "https://github.com/mashagua/presentation-forge.git",
+      "ref": "3c8e6ffa5fa97d0c14c6af8fec4beb440802b9a0"
+    }
+  },
+  "governance": {
+    "stewardship": "community",
+    "availability": "installable",
+    "license": {
+      "state": "known",
+      "value": "MIT",
+      "evidencePath": "LICENSE"
+    },
+    "redistribution": "allowed",
+    "listingMaintainer": {
+      "name": "Ronnie2025",
+      "verified": false
+    },
+    "upstreamMaintainer": {
+      "name": "Ronnie2025",
+      "verified": false
+    }
+  },
+  "compatibility": {
+    "platforms": {
+      "state": "unknown"
+    }
+  },
+  "spec": {
+    "kind": "skill",
+    "riskLevel": "low",
+    "skillType": "procedural"
+  }
+}