chore: prepare Desktop 0.12.11 and Agent 0.11.23 releases

Record the approved bilingual release notes, classify long-task limits and
premature truncation as fixes, and align both feature matrices with the
verified workspace, browser, scheduling and Runtime behavior.

Advance the Agent lock to 0.11.23 for remote file and Git management, optional
model limits, larger bridge exchanges and the unlimited-duration connection
fix. Agent publication reads version-specific approved notes and remains
separate from Desktop Latest. Upgrade Desktop to 0.12.11 before updating Hosts.
No LoongArch preview is included.

Validation: release notes verification, all 3845 tests (66 skipped), typecheck
and lint passed. Current-source Linux x64 workspace and bridge checks passed;
managed ACP Ask and Execute completed two real model requests, both HTTP 200,
with delivered results and cleaned test resources. Native production packages
and publication remain subject to GitHub Actions after candidate approval.

Release note: 准备 Desktop 0.12.11 与 Agent 0.11.23 发布；远程文件和 Git 管理、长任务限制及连接超时修复需先升级桌面端，再更新 Host 上的 Agent。

docs/development/release-runbook.md

@@ -110,6 +110,10 @@ below.
   and are separate from desktop `v${package.version}` releases. Confirm the
   exact Agent release commit and tag with the user before creating or pushing
   either.
+- Store approved bilingual Agent release notes in
+  `resources/agent-release-notes/<agentVersion>.md`. The Agent publication job
+  reads that exact file instead of generating a generic release description;
+  keep it aligned with the approved version and source range.
 - The tagged commit must be reachable from protected `main`. The three native
   jobs build Linux x64, Linux arm64, and Darwin arm64 packages from the same source and locks;
   the catalog job rejects missing architectures, changed bytes for an existing