chore(sync): re-base the fork onto upstream dsh-better-sidebar v0.19.1

The fork was pinned at upstream v0.18.0. That is the entire reason the window
ran TWO sidebars and TWO near-identical panel toggles: DSH 2.0.10 ships its own
right sidebar (@deepseek-ai/dsh-client-ui-sidebar-right), and upstream only
adopted it in v0.19.0-alpha.1 — which arrived after our fork point. v0.19.1 is
also the one upstream line whose support range actually matches our host
(engines.dsh >=0.1.5-rc.1, 14 DSH peers ^0.1.5-rc.1, host = 0.1.5-rc.2), so it
is the only tag the host's startup precheck accepts.

What upstream v0.18.0 → v0.19.1 brings
- src/client/native/{index,surface,tab-adapter}.tsx: every tab the plugin can
  draw becomes an OFFICIAL native tab type + body, and an external plugin's
  descriptor registered later gets its native type too. This is what retires
  the fork's own right panel — and with it the duplicate toggle cluster
  (`toggleCluster` is gone from v0.19.1).
- native tab-chip icons via the `sidebar.right.pane.tab.title` seat, coloured
  built-in tab icons, file/folder glyphs from DSH's own `FileTypeIcon`.
- guide descriptions (DSH renders them while the guide lists <= 4 entries),
  tab bodies that fill the panel, and the 0.1.5-rc.2 adaptation work we were
  carrying by hand (peer/devDep pinning, primitives' transitive devDeps).

How the sync was done
Rebuilt the tree from the v0.19.1 tag rather than resolving 53 conflicted
files: our v0.18.0 delta was measured first and is only (a) one mechanical
rename `dsh-better-sidebar` -> `dsh-apes-sidebar` and (b) ten real edits. So:
tag tree + rename (scoped: code/config/scripts/tests/README, while the 46
historical docs/plans records and switch.sh's upstream package name stay
untouched) + re-applied deltas + our apes module.

Fork deltas re-applied on the new base
- src/client/apes/ (icons / locales / tabs): the three apes:* information-layer
  tabs (agents / apps / profile), registered through the same BetterSidebarService
  as the builtins — which is exactly why they now ride upstream's native adapter
  into the official sidebar for free.
- identity: package.json (name/version 1.2.0/description/forkedFrom), dsh.plugin.json
  (id/version), SIDEBAR_SERVICE_VERSION 1.2.0, README fork notice,
  docs/external-plugin-guide.md.
- scripts/switch.sh + the pnpm switch* scripts (apes <-> upstream two-line switch).
- tests/apes-tabs.spec.ts (unescaped: it starts from the v0.19.1 base).

Dropped
- the Phase A native-registration spike (`apes/native-tabs.tsx` + its spec): it
  re-derived by hand exactly what upstream's native layer already does — the
  hand-written bridge is dead weight now, and v0.19.1's own e2e/jsdom lanes
  cover the same seat contract far better.
- the unused apesProfileGuideDesc key and the two package.json.bak.* backups.

Verified on the new base: typecheck clean; build clean; 1351 passed / 9 skipped
(128 files), up from 1255 on the old base.

scripts/install.ps1

@@ -1,8 +1,8 @@
 ## =============================================================================
-# dsh-better-sidebar 一键安装脚本（官方 CLI 方式，Windows PowerShell 5.1+ / pwsh）
+# dsh-apes-sidebar 一键安装脚本（官方 CLI 方式，Windows PowerShell 5.1+ / pwsh）
 #
 # 通过 DSH 官方插件命令安装 npm 包并自动挂载：
-#   dsh plugin --profile web add dsh-better-sidebar@<version>
+#   dsh plugin --profile web add dsh-apes-sidebar@<version>
 #
 # 包内声明了 dsh.bundle.patch（cordis.patch.yml）：CLI 的 bundle 协调会把它
 # 自动加进 profile 的 dsh.profile.bundles，下次启动即挂载——无需手动写
@@ -52,7 +52,7 @@ param(
   [string]$Profile = 'web'
 )
 
-$PKG = 'dsh-better-sidebar'
+$PKG = 'dsh-apes-sidebar'
 $REGISTRY = if ($env:REGISTRY) { $env:REGISTRY } else { 'https://registry.npmjs.org' }
 
 # DSH_HOME：DSH_HOME 环境变量 > %USERPROFILE% > $HOME
@@ -116,11 +116,11 @@ if (!/^\s*allowBuilds:\s*$/m.test(t)) {
     }
   }
 }
-if (!/^\s*-\s+dsh-better-sidebar\s*$/m.test(t)) {
+if (!/^\s*-\s+dsh-apes-sidebar\s*$/m.test(t)) {
   if (/^\s*minimumReleaseAgeExclude:\s*$/m.test(t)) {
-    t = t.replace(/^(\s*minimumReleaseAgeExclude:\s*)$/m, "$1\n  - dsh-better-sidebar");
+    t = t.replace(/^(\s*minimumReleaseAgeExclude:\s*)$/m, "$1\n  - dsh-apes-sidebar");
   } else {
-    t += "\nminimumReleaseAgeExclude:\n  - dsh-better-sidebar\n";
+    t += "\nminimumReleaseAgeExclude:\n  - dsh-apes-sidebar\n";
   }
 }
 if (t !== before) fs.writeFileSync(p, t);
@@ -233,7 +233,7 @@ if ($addCode -ne 0) {
 $pkgJson = Get-Content -Raw (Join-Path $PROFILE_DIR 'package.json') | ConvertFrom-Json
 $bundles = $pkgJson.dsh.profile.bundles
 if ($bundles -notcontains $PKG) {
-  Warn 'dsh-better-sidebar 未出现在 dsh.profile.bundles 中——挂载未注册。'
+  Warn 'dsh-apes-sidebar 未出现在 dsh.profile.bundles 中——挂载未注册。'
   Warn "若上面的 pnpm 输出提示 ignored build scripts，请确认 $WS_YML 的 allowBuilds 后重跑本脚本。"
   exit 1
 }