baseline: dsh 工作区基线快照（2026-09-10，全新历史起点）

本提交为 dsh_mcn_workshop 仓库的首个提交（旧仓 dsh_MCNProject 已停用），
完整固化 C:/Users/Administrator/.dsh 当前磁盘状态。

1) 临时数据清理：移出 sessions/(81M)、logs/、skill-backup-20260906/(14M)、
   scripts/__pycache__、storages/workspace.json.bak —— 合计 94M（.dsh 162M → 68M）
2) 凭据脱敏：.credentials.yaml（含明文 DEEPSEEK_API_KEY）移出 git 跟踪并加入
   .gitignore；mcn-data-insight/scripts/setup_redfox_key.py 中真实 key 示例改为占位符
3) .gitignore 增补 logs/、skill-backup-*/ 规则
4) 技能结构以当前磁盘状态为准：skills/ = mcn-short-video / impeccable / taste-skill /
   dsh-multi-user-migration；旧技能目录（mcn-dou-analysis、storyboard-prompt、
   short-video-script、browser-harness、mcn-data-insight）与
   profiles/web/node_modules/dsh-vision-router 本地已不存在，本提交记为删除

skills/impeccable/scripts/lib/template-extensions.mjs

@@ -0,0 +1,146 @@
+/**
+ * One owner for "which file extensions hold UI markup".
+ *
+ * Before this module the answer was spelled out separately in hook-lib.mjs
+ * (`detector.extensions` config, issue #316) and in live-wrap.mjs /
+ * live-accept.mjs (a hardcoded `EXTENSIONS` array, duplicated verbatim in both).
+ * The lists drifted: the hook learned configurable server-template extensions
+ * while Live kept its six frontend defaults, so a Phoenix project got design
+ * findings on `.heex` files but `Session markers not found` on Accept (#374).
+ *
+ * Extensions are matched against the END OF THE FILENAME, not `path.extname`,
+ * so double extensions like `.blade.php`, `.html.erb`, and `.html.heex` work.
+ */
+
+import fs from 'node:fs';
+import path from 'node:path';
+
+/**
+ * Built-in markup extensions for Live's wrap/accept source search.
+ *
+ * Elixir's `.ex` is here because Phoenix function components put `~H"""`
+ * templates directly in `lib/**\/*.ex`; `.heex` and `.eex` cover standalone
+ * templates. `.exs` is deliberately absent: those are Elixir *scripts*
+ * (`mix.exs`, `config/*.exs`, tests) and never hold markup, so including them
+ * only gives the wrap query a chance to match build config by accident.
+ */
+export const LIVE_TEMPLATE_EXTENSIONS = Object.freeze([
+  '.html', '.jsx', '.tsx', '.vue', '.svelte', '.astro',
+  '.ex', '.heex', '.eex',
+]);
+
+/**
+ * Normalize `detector.extensions` entries to `{ ext, engine }`.
+ *
+ * Accepts `{ ext, engine }` objects (engine 'html' | 'text', default 'html' —
+ * the common case for server-side templates) or bare strings as shorthand.
+ */
+export function normalizeExtensionEntries(entries) {
+  if (!Array.isArray(entries)) return [];
+  const out = [];
+  for (const entry of entries) {
+    const raw = typeof entry === 'string' ? entry : entry?.ext;
+    if (typeof raw !== 'string') continue;
+    let ext = raw.trim().toLowerCase();
+    if (!ext) continue;
+    if (!ext.startsWith('.')) ext = `.${ext}`;
+    const engine = (!(typeof entry === 'string') && entry?.engine === 'text') ? 'text' : 'html';
+    out.push({ ext, engine });
+  }
+  return out;
+}
+
+export function mergeExtensions(existing, incoming) {
+  const map = new Map();
+  for (const entry of normalizeExtensionEntries(existing)) map.set(entry.ext, entry);
+  for (const entry of normalizeExtensionEntries(incoming)) map.set(entry.ext, entry);
+  return Array.from(map.values());
+}
+
+export function matchConfiguredExtension(filePath, extensions) {
+  if (!Array.isArray(extensions) || extensions.length === 0) return null;
+  const name = path.basename(String(filePath || '')).toLowerCase();
+  if (!name) return null;
+  // The longest matching suffix wins, so `.blade.php` beats a broader `.php`
+  // entry regardless of config order.
+  let best = null;
+  for (const entry of normalizeExtensionEntries(extensions)) {
+    if (name.length > entry.ext.length && name.endsWith(entry.ext)
+      && (!best || entry.ext.length > best.ext.length)) {
+      best = entry;
+    }
+  }
+  return best;
+}
+
+/**
+ * Does this filename end in one of `extensions`?
+ *
+ * Suffix matching rather than `path.extname` equality, so a configured
+ * `.html.erb` matches `show.html.erb` (whose extname is only `.erb`). The
+ * `name.length > ext.length` guard keeps a file literally named `.heex` from
+ * counting as a template.
+ */
+export function matchesTemplateExtension(filePath, extensions) {
+  const name = path.basename(String(filePath || '')).toLowerCase();
+  if (!name) return false;
+  for (const ext of extensions) {
+    if (name.length > ext.length && name.endsWith(ext)) return true;
+  }
+  return false;
+}
+
+/**
+ * Built-in Live extensions plus any the project configured for the detector.
+ *
+ * Reading `detector.extensions` here is the point: a user who taught the design
+ * hook about `.blade.php` should not have to teach Live separately. Config
+ * parsing is intentionally minimal (own the shape, not the whole hook config)
+ * so this module stays importable from the Live CLI without pulling in
+ * hook-lib.mjs.
+ */
+export function resolveLiveTemplateExtensions(cwd = process.cwd()) {
+  const cached = extensionCache.get(cwd);
+  if (cached) return cached;
+  const resolved = readLiveTemplateExtensions(cwd);
+  extensionCache.set(cwd, resolved);
+  return resolved;
+}
+
+// live-wrap calls the resolver once per candidate query per pass (up to eight
+// times in one CLI run), and every call would otherwise re-read and re-parse
+// both config files. Keyed by cwd; a single CLI process never rewrites its own
+// config mid-run.
+const extensionCache = new Map();
+
+/** Test seam: drop the memoized config so a fixture can rewrite config.json. */
+export function clearTemplateExtensionCache() {
+  extensionCache.clear();
+}
+
+function readLiveTemplateExtensions(cwd) {
+  const configured = [];
+  for (const name of ['config.json', 'config.local.json']) {
+    const raw = safeReadJson(path.join(cwd, '.impeccable', name));
+    const detector = raw?.detector;
+    if (detector && typeof detector === 'object' && !Array.isArray(detector)) {
+      configured.push(...normalizeExtensionEntries(detector.extensions));
+    }
+  }
+  const seen = new Set(LIVE_TEMPLATE_EXTENSIONS);
+  const out = [...LIVE_TEMPLATE_EXTENSIONS];
+  for (const { ext } of configured) {
+    if (seen.has(ext)) continue;
+    seen.add(ext);
+    out.push(ext);
+  }
+  return out;
+}
+
+function safeReadJson(filePath) {
+  try {
+    return JSON.parse(fs.readFileSync(filePath, 'utf-8'));
+  } catch {
+    return null;
+  }
+}