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.

src/index.ts

@@ -1,5 +1,5 @@
 /**
- * dsh-better-sidebar host half: the /sidebar JSON API (explorer listing, file
+ * dsh-apes-sidebar host half: the /sidebar JSON API (explorer listing, file
  * read/write, git), the /sidebar/file media route (images), the /sidebar/html
  * preview route, the /sidebar/bundle lazy-chunk route (client code splits),
  * and the terminal WebSocket upgrade. Every route passes the same
@@ -61,7 +61,7 @@ import { readPersistedSession } from './session-store.ts'
 export { Config }
 export type { SidebarConfig, ResolvedSidebarConfig }
 // Re-export the Context augmentation (`declare module '@deepseek-ai/cordis'`)
-// so consumers `import type {} from 'dsh-better-sidebar'` and gain
+// so consumers `import type {} from 'dsh-apes-sidebar'` and gain
 // `ctx.betterSidebar`; the Context re-export below is the vendored cordis
 // Context intersected with the structural service faces.
 // Also re-export the service descriptor types so consumers can type their
@@ -77,7 +77,7 @@ export type {
 } from './client/service.ts'
 
 /** Plugin identity for cordis.yml rows. */
-export const name = 'dsh-better-sidebar'
+export const name = 'dsh-apes-sidebar'
 
 /** Services required before mounting: the webserver routes, the session store, the web runtime's trusted hosts, and the tool registry. */
 export const inject = ['webServer', 'sessions', 'webRuntime', 'tools']
@@ -744,7 +744,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
     const detail = status.ok
       ? 'unknown cause'
       : `${status.cause}. Repair: ${status.command}`
-    ctx.logger?.warn(`[dsh-better-sidebar] node-pty (${DSH_NODE_PTY_RANGE}) failed to load: ${detail}`)
+    ctx.logger?.warn(`[dsh-apes-sidebar] node-pty (${DSH_NODE_PTY_RANGE}) failed to load: ${detail}`)
   }
   const ptyManager = nodePty !== null
     ? new PtyManager(terminalShell, resolved.terminalsPerSession, resolved.shellArgs, nodePty)
@@ -800,7 +800,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
   }
   ctx.inject(['settings'], (sctx) => {
     // DSH 0.1.2-alpha.2 validates namespaces at compile time
-    // (SettingsNamespaceInput); the 'dsh-better-sidebar' literal passes, so the
+    // (SettingsNamespaceInput); the 'dsh-apes-sidebar' literal passes, so the
     // runtime helper this used to call (settingsNamespace) is gone upstream.
     const ns = SIDEBAR_PREFS_NS
     // The structural settings mirror types `schema` as unknown, so the
@@ -879,7 +879,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
   // transcript and the inherited in-progress snapshot read them here. The
   // effect releases the listener on fiber disposal.
   const assistantLive = createAssistantLiveBuffer(ctx)
-  ctx.effect(() => () => { assistantLive.dispose() }, 'dsh-better-sidebar: live assistant stream buffer')
+  ctx.effect(() => () => { assistantLive.dispose() }, 'dsh-apes-sidebar: live assistant stream buffer')
   const api = buildApi(ctx, ptyManager, agentPtyRegistry, resolved, terminalShell, () => settingsFace, assistantLive)
   ctx.effect(() => ctx.webServer.register({
     kind: 'prefix',
@@ -910,7 +910,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         writeError(res, error)
       }
     },
-  }), 'dsh-better-sidebar: /sidebar/api routes')
+  }), 'dsh-apes-sidebar: /sidebar/api routes')
 
   // ── Raw upload route ───────────────────────────────────────────────────
   // One request writes one file without JSON/base64 inflation. Folder uploads
@@ -952,13 +952,13 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         writeError(res, error)
       }
     },
-  }), 'dsh-better-sidebar: /sidebar/upload route')
+  }), 'dsh-apes-sidebar: /sidebar/upload route')
 
   // ── Lazy chunk route (client bundle splits) ─────────────────────────────
   // Serves the client half's split bundles (lib/client-<name>.js) so the
   // heavy preview/terminal libraries load on first use, not at page start
   // (see bundle-route.ts / src/client/chunk-loader.ts).
-  ctx.effect(() => registerBundleRoute(ctx, fence), 'dsh-better-sidebar: /sidebar/bundle chunk route')
+  ctx.effect(() => registerBundleRoute(ctx, fence), 'dsh-apes-sidebar: /sidebar/bundle chunk route')
 
   // ── Media route (images for the editor) ─────────────────────────────────
   ctx.effect(() => ctx.webServer.register({
@@ -1000,7 +1000,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         writeError(res, error)
       }
     },
-  }), 'dsh-better-sidebar: /sidebar/file media route')
+  }), 'dsh-apes-sidebar: /sidebar/file media route')
 
   // ── HTML preview route (sandboxed HTML + its relative assets) ───────────
   // Serves files under the session cwd for the built-in HTML previewer. The
@@ -1062,7 +1062,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         writeError(res, error)
       }
     },
-  }), 'dsh-better-sidebar: /sidebar/html preview route')
+  }), 'dsh-apes-sidebar: /sidebar/html preview route')
 
   // ── Terminal WebSocket ──────────────────────────────────────────────────
   // One upgrade endpoint serves both UI-tab terminals (?tab=...) and
@@ -1086,7 +1086,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         void attachTerminal(ctx, ptyManager, agentPtyRegistry, ws, req, resolved, () => settingsFace)
       })
     },
-  }), 'dsh-better-sidebar: terminal WebSocket')
+  }), 'dsh-apes-sidebar: terminal WebSocket')
 
   // ── Agent terminals push WebSocket ──────────────────────────────────────
   // Pushes the live list of agent terminals for one session to the sidebar
@@ -1108,7 +1108,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         void attachAgentList(agentPtyRegistry, ws, req)
       })
     },
-  }), 'dsh-better-sidebar: agent-terminals push WebSocket')
+  }), 'dsh-apes-sidebar: agent-terminals push WebSocket')
 
   // ── Agent opens push WebSocket ─────────────────────────────────────────
   // Pushes `sidebar_open` requests for one session to the sidebar view: the
@@ -1128,7 +1128,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
         void attachAgentOpen(agentOpenRegistry, ws, req)
       })
     },
-  }), 'dsh-better-sidebar: agent-opens push WebSocket')
+  }), 'dsh-apes-sidebar: agent-opens push WebSocket')
 
   ctx.effect(() => () => {
     toolsDisposers?.()
@@ -1139,7 +1139,7 @@ export function apply(ctx: Context, config?: SidebarConfig): void {
     wss.close()
     agentListWss.close()
     agentOpenWss.close()
-  }, 'dsh-better-sidebar: teardown')
+  }, 'dsh-apes-sidebar: teardown')
 }
 
 /** Push queued `sidebar_open` requests for one session to a connected view. */