chore: prepare 0.12.9 desktop release

Record the approved bilingual notes for todo source entries, accurate
request status, parallel OpenCode reliability, image editing, native
questions, longer Continue requests, reasoning formatting, and activity
history notices. Keep all previously published release entries intact.

Synchronize package and feature-matrix versions for the standard six-target
desktop release. Agent remains 0.11.21; no Agent release or LoongArch preview
is included. Release tags remain pending exact-commit approval and CI.

Validation: 3618 tests passed, 61 skipped; typecheck, lint, and bilingual
release-note verification passed. No local production package was built.

resources/release-notes.json

@@ -1,6 +1,42 @@
 {
   "formatVersion": 1,
   "releases": [
+    {
+      "version": "0.12.9",
+      "releasedAt": "2026-09-08",
+      "notes": {
+        "zh-CN": {
+          "highlights": [],
+          "features": [
+            "**待办来源记录**：在魔法笔记的待办视图选择事项后，可直接查看对应的来源记录。遇到读取失败可以重试，不必来回切换查找笔记。"
+          ],
+          "fixes": [
+            "**消息状态更准确**：回复底部会区分准备请求、等待重试、开始重试、工具活动和等待回答，本机 OpenCode 还会显示原生重试次数与计划时间。没有新进展时不再用闪烁暗示模型仍在工作，会话列表闪点及发送、停止按钮保持不变。",
+            "**并行 OpenCode 会话**：修复开启另一条本机会话时，已有会话可能一直等待的问题。服务异常退出时会明确提示失败，不会自动重复执行已运行的命令。",
+            "**参考图编辑**：修复部分兼容图像服务商拒绝图片编辑请求的问题。使用参考图修改图片时，不再附带只适用于生成接口的默认参数。",
+            "**原生问答与长上下文**：修复 OpenCode、Continue 的较长问题、较多选项或较长自定义回答被截断或拒绝的问题，并提高 Continue 的请求正文容量。用户可以继续通过现有问答卡片回答，较长上下文不再受旧的小容量限制阻断。",
+            "**推理排版**：修复 OpenCode 流式推理片段拼接时丢失 Markdown 分段的问题。推理过程中的段落和换行会按原始内容保留。",
+            "**运行记录提示**：移除常驻的旧版活动历史截断警告，减少与当前执行无关的提示。此调整不会恢复旧版本已经丢失的历史记录。"
+          ],
+          "notices": []
+        },
+        "en-US": {
+          "highlights": [],
+          "features": [
+            "**Todo source entries**: Select an item in the Magic Notes todo view to read its source entry directly. Failed reads can be retried without switching back and forth to find the original note."
+          ],
+          "fixes": [
+            "**More accurate message status**: The reply footer distinguishes request preparation, retry waiting, retry dispatch, tool activity, and pending answers; local OpenCode also reports native retry attempts and scheduled times. The footer no longer pulses to imply progress when none is reported, while conversation-list indicators and send/stop buttons remain unchanged.",
+            "**Parallel OpenCode conversations**: Fixed an issue where opening another local conversation could leave an existing one waiting indefinitely. Unexpected server exits now produce an explicit failure without automatically replaying commands that already ran.",
+            "**Reference-image editing**: Fixed editing requests rejected by some compatible image providers. Reference-image edits no longer include default parameters that belong only to the generation endpoint.",
+            "**Native questions and longer context**: Fixed longer questions, larger option lists, and longer custom answers being truncated or rejected in OpenCode and Continue, and increased Continue's request-body capacity. Users can keep answering through the existing question card without longer context hitting the previous small request limit.",
+            "**Reasoning formatting**: Fixed lost Markdown boundaries when streamed OpenCode reasoning fragments were joined. Paragraphs and line breaks now retain their original structure.",
+            "**Run-history notices**: Removed the persistent legacy activity-history truncation warning to reduce notices unrelated to current work. This does not restore history already lost in older versions."
+          ],
+          "notices": []
+        }
+      }
+    },
     {
       "version": "0.12.8",
       "releasedAt": "2026-09-08",