chore: 并入已删除会话的在途成果（防丢失；原会话已删，未做功能验收）

**背景**：这些改动原属本工作区另外几个会话（T01/T02 等），**那些会话已被用户删除** ⇒
工作树里的成果处于"无主"状态，一次错误 checkout / 覆盖即**永久丢失** ⇒ 代入库保全。
口径遵循本项目**先例**（`39a1f2e` / `b617cdb`：**别人的活，代入库并在提交信息里注明**）。

**内容**：档案 101「能力管理」改名 + 页内 tab 分页｜档案 102 语言切换搬入「用户设置」｜
`07-实例UI分区登记表.md`｜`scripts/find-ui*.mjs`（UI 元素定位工具）｜`poc/portal-entry/`（0.5.3）｜
`src/web/locale-pref.ts` + `home-files.ts`（语言偏好持久化）｜`test/locale-pref.test.mjs`｜
`package.json`｜`BRIEF.md` / `INDEX.md` / `docs-manifest.json` / `03-路线图与待办.md` / 档案 100 增量。

**已做最小健全性检查**（⚠️ **未跑完整构建 / 单测** —— 那是原会话的验收职责，本次只求"不丢"）：
- JSON 合法：`package.json` / `poc/business-plugins/package.json` / `docs-manifest.json` ✓
- 4 个 TS 文件 `{}`/`()` 配平 ✓；新增文件均非空 ✓
- 规模：13 文件改动 +340/−210，新增 12 条

**未 push**（按 §4 提交边界：用户说"提交"，未说"推送"）。

poc/portal-entry/lib/index.js

@@ -0,0 +1,101 @@
+// @dsh-local/portal-entry — PoC host plugin for the dsh web profile.
+//
+// Goal: prove the official profile-plugin mechanism on dsh 0.1.2-rc.1
+// (install -> load -> persist across restart -> remove), with zero risk to
+// the running profile: every side effect is guarded, nothing can throw out
+// of apply().
+//
+// v1 evidence channel: an append-only marker file
+//   $DSH_HOME/.dsh-poc-portal-entry.log
+// written when the row is instantiated. Tool registration (defineTool from
+// @deepseek-ai/dsh-tools) is attempted defensively; failure is logged, never
+// fatal.
+
+import { appendFileSync } from "node:fs";
+import { join } from "node:path";
+
+const MARKER = ".dsh-poc-portal-entry.log";
+const PORTAL_ROOT = process.env.DSH_SERVER_LOGIN_URL ?? "http://127.0.0.1:3080";
+
+/** Append one line to the marker file. Never throws. */
+function log(line) {
+  try {
+    const home = process.env.DSH_HOME || process.env.HOME || ".";
+    appendFileSync(join(home, MARKER), `${new Date().toISOString()} ${line}\n`);
+  } catch {
+    // marker writes must never take the profile down
+  }
+}
+
+/** Build the portal_ping tool definition (lazy import of defineTool). */
+async function portalPingDefinition() {
+  const { defineTool } = await import("@deepseek-ai/dsh-tools");
+  return defineTool({
+    name: "portal_ping",
+    description:
+      "PoC tool: probe the dsh-server-login portal reachable from this instance. Returns HTTP status and body size of the portal root.",
+    parameters: {},
+    output: {
+      schema: {
+        type: "object",
+        additionalProperties: false,
+        properties: {
+          ok: { type: "boolean", required: true },
+          status: { type: "number" },
+          bytes: { type: "number" },
+          note: { type: "string" }
+        }
+      }
+    },
+    isConcurrencySafe: () => true,
+    async execute() {
+      try {
+        const res = await fetch(PORTAL_ROOT, { redirect: "manual" });
+        const body = await res.arrayBuffer();
+        return {
+          ok: true,
+          status: res.status,
+          bytes: body.byteLength,
+          note: `portal root reachable from instance (${PORTAL_ROOT})`
+        };
+      } catch (err) {
+        return { ok: false, note: `portal unreachable: ${String(err?.message ?? err)}` };
+      }
+    }
+  });
+}
+
+/** Cordis-style plugin apply. Row declares inject:[tools], so ctx.tools is
+ * available; every failure is still contained and logged. */
+export function apply(ctx) {
+  log(`apply pid=${process.pid} dshHome=${process.env.DSH_HOME ?? ""} home=${process.env.HOME ?? ""}`);
+
+  const register = () => {
+    try {
+      if (!ctx.tools || typeof ctx.tools.register !== "function") {
+        log("tools service unavailable at apply time");
+        return;
+      }
+      portalPingDefinition()
+        .then((def) => {
+          try {
+            ctx.tools.register(def);
+            log("tool portal_ping registered");
+          } catch (err) {
+            log(`tool register threw: ${String(err?.message ?? err)}`);
+          }
+        })
+        .catch((err) => log(`tool build failed: ${String(err?.message ?? err)}`));
+    } catch (err) {
+      log(`tools access failed: ${String(err?.message ?? err)}`);
+    }
+  };
+
+  try {
+    register();
+  } catch (err) {
+    log(`register wrapper failed: ${String(err?.message ?? err)}`);
+  }
+}
+
+export default apply;