fix(tui): per-file polish round 9 — kv/data context

KV read rejected with ENOENT on first launch (no kv.json yet), logging a
misleading "Failed to read KV state" error; check existence first and
return an empty map so genuine read/parse failures still surface. The
data context's event-driven catalog/reference/integration refreshes were
voided with no rejection handler, producing unhandled rejections on a
transient failure; attach .catch(console.error) to match the
allSettled+console.error initial-load path.

Author: edy

MERGE.md

@@ -204,6 +204,7 @@ fork 与上游改了同一处（常见于 TUI 视觉/UX、core 加固逻辑）
 | 逐文件打磨轮6：`feature-plugins/system/diff-viewer-ui.tsx`（`routes/session/{dialog-timeline,permission,dialog-fork-from-timeline,subagent-footer,question}.tsx`+`routes/home*.tsx`+`feature-plugins/{system/*,home/*}` 已审计） | 中 | 保留 bug 修复：`Panel` `borderProps.borderColor` 由 setup 期快照改 getter（`theme.border` 随对象展开保持响应式，原主题切换后 diff 查看器面板边框色冻结，`Separator` 已用 `() =>` 正确）；fork `.data!.id` 无守卫（与 `dialog-message.tsx` fork 同款上游模式）择要跳过；`diff-viewer-file-tree-utils.moveFileTreeSelectionToFile` 仅测试引用但恐留待键位，暂不删（上游若已做可取上游版本） |
 | 逐文件打磨轮7：`component/dialog-model.tsx`（`dialog-{agent,move-session,theme-list,variant,session-delete-failed,session-list,skill,stash,workspace-file-changes,workspace-list}.tsx`+`command-palette.tsx` 已审计） | 中 | 保留 bug 修复：收藏/最近模型选项由可选的 `model.id` 改用可靠的映射键 `item.modelID`（`id?: string` 缺省时 `model.id.includes("-nano")` 抛错、选中项 modelID 变 undefined；并与 providerOptions 分支用键一致）；`dialog-theme-list` `theme.all()` setup 期快照（需订阅 `subscribeThemes` 才能修，`all()` 非响应式且启动后基本不变）择要跳过（上游若已做可取上游版本） |
 | 逐文件打磨轮8：`prompt/{part.ts,frecency.tsx}` + `test/prompt/part.test.ts`（`prompt/{display,history,stash,traits}` + `component/prompt/{history,frecency,stash}` 再导出壳已审计） | 中 | 保留 bug 修复：`expandPastedTextPlaceholders` 的 `String.replace(needle, part.text)` 改函数替换 `() => part.text`（粘贴含 `$&`/`$'`/`$$`/`$n` 的文本经 open-editor/copy 路径被当替换模式解释而损坏，补回归测试）；`frecency` 剪枝 `setStore("data", obj)` 改 `reconcile(obj)`（Solid store 合并语义使被剪路径永不删除，会话内 map 无限增长、每次 update 全量重写 jsonl）（上游若已做可取上游版本） |
+| 逐文件打磨轮9：`context/{kv,data}.tsx`（`context/{permission,prompt,clipboard,editor,path-format,thinking,directory,location}` 已审计） | 低 | 保留 bug 修复：`kv` 读取前先 `Bun.file(file).exists()`，缺文件返回 `{}`（首次启动 `kv.json` 不存在时不再打印误导性的 "Failed to read KV state"，保留真实读/解析错误日志）；`data` 事件驱动的 `catalog/reference/integration.updated` 三处 `void refresh()` 补 `.catch(console.error)`（`throwOnError` 下瞬时失败原为未处理 rejection，与初始加载 allSettled+console.error 一致）；`editor.ts` Zed 轮询代际/`enabled()` 非响应式属自我纠正边角，按审计建议暂缓（上游若已做可取上游版本） |
 
 ### 其他
 

packages/tui/src/context/data.tsx

@@ -127,7 +127,7 @@ export const { use: useData, provider: DataProvider } = createSimpleContext({
           void Promise.all([
             result.location.model.refresh(event.location),
             result.location.provider.refresh(event.location),
-          ])
+          ]).catch((error) => console.error("Failed to refresh catalog", error))
           break
         case "session.next.agent.switched":
           message.update(event.data.sessionID, (draft) => {
@@ -390,14 +390,14 @@ export const { use: useData, provider: DataProvider } = createSimpleContext({
           })
           break
         case "reference.updated":
-          void result.location.reference.refresh()
+          void result.location.reference.refresh().catch((error) => console.error("Failed to refresh references", error))
           break
         case "integration.updated":
           void Promise.all([
             result.location.integration.refresh(event.location),
             result.location.model.refresh(event.location),
             result.location.provider.refresh(event.location),
-          ])
+          ]).catch((error) => console.error("Failed to refresh integrations", error))
           break
       }
     }

packages/tui/src/context/kv.tsx

@@ -19,7 +19,10 @@ export const { use: useKV, provider: KVProvider } = createSimpleContext({
     // Queue same-process writes so rapid updates persist in order.
     let write = Promise.resolve()
 
-    Flock.withLock(lock, () => readJson<Record<string, unknown>>(file))
+    Flock.withLock(lock, async () => {
+      if (!(await Bun.file(file).exists())) return {}
+      return readJson<Record<string, unknown>>(file)
+    })
       .then((x) => {
         setStore(x)
       })