feat(editor): 拆分 EditorHost/TextEditor — code/markdown 成为注册 viewer,fs.read 增加 head 字节
- 新 src/client/EditorHost.tsx:'editor' tab 组件。matchFileViewer → 按 fetchStrategy 分发(纯逻辑在 editor-load.ts)→ 渲染 viewer.component; binary 无匹配时渲染共享 BinaryDownload。标题栏保留在 host - 新 src/client/TextEditor.tsx:code/markdown 的 viewer 组件(CodeMirror + 保存/脏点/截断横幅 + md 预览/编辑切换),内容由 host 经 fsRead 传入, 自身不再 fetch;按 viewerId === 'markdown' 分支(不再解析扩展名) - 新 src/client/editor-load.ts:planFirstMatch / planFsReadOutcome / decodeHead 纯函数,策略分发可单测 - 新 src/client/binary-download.tsx:共享下载兜底组件(viewer 注册与 host fallback 同一 UI) - host src/index.ts:fs.read 二进制响应增加 head 字段(base64,前 4KB, 唯一 host 触碰,设计文档 detect 机制所需);客户端 FsBinaryResult 同步 - builtins:注册 8 个 viewer(新增 markdown exts md/markdown、code catch-all -100);binary-download 增加 NUL detect + 复用 BinaryDownload - 删除 src/client/EditorView.tsx(职责一分为二);陈旧注释同步 - 新增 tests/editor-load.spec.ts(12 用例)
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@@ -54,8 +54,9 @@ export interface GitLogEntry {
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/** Text read result. */
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export interface FsTextResult { kind: 'text'; content: string; truncated: boolean }
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/** Binary read result (no content; images load through the media route). */
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export interface FsBinaryResult { kind: 'binary'; size: number; truncated: boolean }
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/** Binary read result (no content; images load through the media route).
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* `head` carries the first bytes (base64) for viewer detect sniffing. */
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export interface FsBinaryResult { kind: 'binary'; size: number; truncated: boolean; head: string }
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async function call<T>(method: string, payload: Record<string, unknown>, signal?: AbortSignal): Promise<T> {
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let response: Response
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