docs: refresh CLAUDE.md + localize empty-ASR capsule message

[appergb]

User description

Summary

• CLAUDE.md 同步：补 coordinator 拆分（dictation/qa/resources）、coordinator_state、qa_hotkey、三套并行 hotkey 监听
• 新增 Q&A pipeline 章节（panel 路由 / capsule sweep / selection 3-tier fallback / 4000 char 截断 / 多轮 messages）
• 新增 Insertion paths 章节（跨平台默认路径 vs Windows IME-IPC 路径）
• 顶部 adjacent docs 段落补 AGENTS.md / README.zh.md / USAGE.md 指引
• 空转写 capsule 文案 "ASR returned empty transcript" → "没有识别到语音"（line 907 内部 Err 字符串保留英文）

Test plan

• `cargo check` pass
• 真机：录音不说话立即停止 → 胶囊错误状态应显示中文 "没有识别到语音"

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PR Type

Documentation, Bug fix

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Description

• Refresh CLAUDE.md architecture guidance

• Document Q&A and insertion pipelines

• Localize empty-ASR capsule error text

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Diagram Walkthrough

flowchart LR
  PR["PR changes"] --> DOCS["Update CLAUDE.md guidance"]
  PR --> ASR["Localize empty-ASR capsule message"]

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File Walkthrough

	Relevant files
Documentation	CLAUDE.md Expand architecture and workflow docs                                        CLAUDE.md Added an Adjacent docs section linking AGENTS.md, README.zh.md, and USAGE.md. Expanded the architecture map to cover dictation, QA, resources, hotkeys, audio/ASR, insertion, and selection modules. Documented the Q&A pipeline, selection fallback behavior, truncation rules, and multi-turn memory. Added an insertion-paths section describing the cross-platform default flow and the Windows IME IPC route. +68/-17
Bug fix	dictation.rs Localize empty transcript capsule message                                openless-all/app/src-tauri/src/coordinator/dictation.rs Changed the empty-transcript capsule error text from English to Chinese. Preserved the internal Err string behavior for upstream logging and consumers. +1/-1

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[github-actions]

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