chore(docs): 清理 tag-one 占位符 → 真实内容标签（28 原文 + 26 翻译）

背景：站点早期模板带 "tag-one" 占位符作为 frontmatter.tags 默认值，
contributors 撰文时没覆盖，30 份文档仍带占位符。tags 字段影响 sidebar
显示、未来可能接入的 tag 筛选 UI、SEO 结构化数据。批量清理。

作用域：
- 28 份原文 + 26 份 .en/.zh 翻译 = 54 个文件
- 跳过 PR #307 已在处理的 4 份（rag, embedding, context-eng, ai-town），
  由那个 PR 负责清理，合并顺序无关
- 纯文本改动，零 URL 变化，无需 301 redirects

内容标签分类覆盖：
- CommunityShare/Geek: image-hosting / self-hosting / cdn / git-workflow
- CommunityShare/Life: unsw / university-benefits / australia-study
- CommunityShare/Personal-Study-Notes: reinforcement-learning / ppo / gae
- ai/Introduction-of-Multi-agents-system: multi-agent-systems / agent-framework
- ai/MoE: mixture-of-experts / model-architecture
- ai/Multi-agents-system-on-Code-Translation: code-translation / llm-application
- ai/ai-math-basics: math-textbooks / learning-resources / book-recommendations
- ai/misc-tools: ml-experiment-tracking / swanlab
- ai/recommender-systems: 6 份王树森笔记统一 recommender-systems 前缀 +
  各章节专属标签（feature-crossing / retrieval / cold-start / ranking 等）
- computer-science/cpp_backend: 8 份统一 cpp-backend 前缀 + 子主题
  （threadpool / memory-pool / build-system / gcc / cmake / vcpkg）
- jobs: career / interview-preparation / internship / australia-job-market

流程：
1. Scan + 自己起草 tag 提案
2. 派 reviewer subagent 读每份文档前 50 行审标签（9 处被挑出修正全部采纳）
3. Python 脚本原子替换 frontmatter 里 "  - tag-one" → 多行新 tags
4. grep 校验残留：仅剩 PR #307 的 4 个文件

docId 全部原样保留，sync-uuid 合并后不会误判为新文档。

Author: github-actions[bot]

app/docs/CommunityShare/Geek/cloudflare-r2-sharex-free-image-hosting.en.mdx

@@ -3,7 +3,11 @@ title: Building a Personal/Team "Permanent" Image Host with Cloudflare R2 + Shar
 description: ""
 date: "2025-09-27"
 tags:
-  - tag-one
+  - image-hosting
+  - cloudflare-r2
+  - sharex
+  - self-hosting
+  - cdn
 docId: gj4bn01un0s0841berfvwrn5
 lang: en
 translatedFrom: zh

app/docs/CommunityShare/Geek/cloudflare-r2-sharex-free-image-hosting.mdx

@@ -3,7 +3,11 @@ title: 使用 Cloudflare R2 + ShareX 搭建个人/团队专属“永久”图床
 description: ""
 date: "2025-09-27"
 tags:
-  - tag-one
+  - image-hosting
+  - cloudflare-r2
+  - sharex
+  - self-hosting
+  - cdn
 docId: gj4bn01un0s0841berfvwrn5
 ---
 

app/docs/CommunityShare/Geek/git101.en.mdx

@@ -3,7 +3,10 @@ title: Git Getting Started Guide — Git Tips Every Developer Should Know
 description: ""
 date: "2025-09-19"
 tags:
-  - tag-one
+  - git-basics
+  - version-control
+  - git-workflow
+  - programmer-essentials
 docId: tksz80mfqqyzwzzer5p3uxtg
 lang: en
 translatedFrom: zh

app/docs/CommunityShare/Geek/git101.mdx

@@ -3,7 +3,10 @@ title: Git入门操作指南-程序员必会的git小技巧
 description: ""
 date: "2025-09-19"
 tags:
-  - tag-one
+  - git-basics
+  - version-control
+  - git-workflow
+  - programmer-essentials
 docId: tksz80mfqqyzwzzer5p3uxtg
 ---
 

app/docs/CommunityShare/Geek/picturecdn.en.mdx

@@ -3,7 +3,10 @@ title: How to Deploy Your Own GitHub Image Hosting with PictureCDN
 description: ""
 date: "2025-09-27"
 tags:
-  - tag-one
+  - image-hosting
+  - github-pages
+  - cdn
+  - self-hosting
 docId: e6udpzrorhvgeeda6xpy1e0s
 lang: en
 translatedFrom: zh

app/docs/CommunityShare/Geek/picturecdn.mdx

@@ -3,7 +3,10 @@ title: 如何部署你自己的Github图床-PictureCDN
 description: ""
 date: "2025-09-27"
 tags:
-  - tag-one
+  - image-hosting
+  - github-pages
+  - cdn
+  - self-hosting
 docId: e6udpzrorhvgeeda6xpy1e0s
 ---
 

app/docs/CommunityShare/Life/unsw-student-benefit.md

@@ -3,7 +3,10 @@ title: UNSW学费回收计划-那些你还不知道的隐藏福利
 description: ""
 date: "2025-10-03"
 tags:
-  - tag-one
+  - unsw
+  - university-benefits
+  - student-resources
+  - australia-study
 docId: jgyg6bp0nceyrxirz5qw3zsv
 ---
 

app/docs/CommunityShare/Personal-Study-Notes/Reinforcement-Learning/ppo.md

@@ -3,7 +3,10 @@ title: PPO
 description: ""
 date: "2025-10-03"
 tags:
-  - tag-one
+  - reinforcement-learning
+  - ppo
+  - policy-gradient
+  - gae
 docId: zf8zk108oqbsg56xjyqb5txk
 ---
 

app/docs/ai/Introduction-of-Multi-agents-system/introduction_of_multi-agents_system.en.md

@@ -3,7 +3,9 @@ title: Introduction of Multi-Agent Systems (For Any Task You Want)
 description: ""
 date: "2025-09-29"
 tags:
-  - tag-one
+  - multi-agent-systems
+  - agent-framework
+  - llm-agents
 docId: h53uwefhlykt9ietsx9x0vtn
 lang: en
 translatedFrom: zh

app/docs/ai/Introduction-of-Multi-agents-system/introduction_of_multi-agents_system.md

@@ -3,7 +3,9 @@ title: Introduction of Multi-agents system(In any task you want)
 description: ""
 date: "2025-09-29"
 tags:
-  - tag-one
+  - multi-agent-systems
+  - agent-framework
+  - llm-agents
 docId: h53uwefhlykt9ietsx9x0vtn
 ---