feat(apes): revive the task/message tabs in the info layer

C6 removed apes:tasks as a duplicate of the host session panel; in practice the two answer different questions (host panel = switch workspaces, plugin tab = who is running right now), so the tab is restored and the info layer goes back to five types.

tasks: live session list (current / running / subagent markers) + showInactive toggle via pluginSettings['apes:tasks']; messages: placeholder that states the host has no message feed yet; both get badge counters, and the whole layer now honours the visible gate (auto-collapse) so hidden tabs stop waking on session events.

zh/en/ja dictionaries in sync (AGENTS 5); wiki 02/03/07 reverted from three to five tabs; decision record in docs/plans/2026-10-11-apes-tab-revival.md.

docs/wiki/07-开发与测试.md

@@ -33,7 +33,7 @@ src/
     native/             原生右侧栏适配（tab 记录、tab 体、tab 芯片标题）
     builtins/           内置面板：editor / git / subagent / sidechat / terminal / browser + 预览器
     sidebar/            自绘底部工作台与开合控件
-    apes/               信息层三 tab（本 fork 增量：tabs.tsx / icons.tsx / locales.ts）
+    apes/               信息层五 tab（本 fork 增量：tabs.tsx / icons.tsx / locales.ts）
     changes/ diff/      文件变动与 diff 视图
     chunks/             懒加载 chunk：editor / locale / mermaid / terminal
     locales*.ts         i18n（`locales.ts` + 19 个语言覆盖文件）