✨ feat(vscode): codex 命令统一组装，模型/思考级别可在设置面板配置

新增 cc/codexCommand.ts 作为 codex 调用的唯一出口（buildCodexArgs /
buildCodexCommandString），把 exec-review / resume / interactive 三种形态
的 flag 拼装收敛到一处；模型与思考级别作为自由文本项写入全局设置并贯穿
webview 消息通道，空值则不传 -c，沿用 codex config.toml 默认。

vscode/src/panel/handlers/settings.ts

@@ -33,6 +33,8 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
   implTabPreCreateScript: string
   implTabPostCloseScript: string
   conflictResolutionProfilePath: string
+  codexModel: string
+  codexReasoningEffort: string
   youtrackBaseUrl: string
   youtrackProjectShortName: string
   youtrackCloseCommand: string
@@ -61,6 +63,9 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
   const trimmedImplPost = payload.implTabPostCloseScript.trim()
   // conflict-resolution profile: '' is meaningful (= DEFAULT_PROFILE_PATH).
   const trimmedConflictProfile = payload.conflictResolutionProfilePath.trim()
+  // codex 模型 / 思考级别：空串有意义（= 用 codex 默认），只 trim。
+  const trimmedCodexModel = payload.codexModel.trim()
+  const trimmedCodexReasoningEffort = payload.codexReasoningEffort.trim()
   const prev = getSettings(panel.context)
   // Capture the previous token *for this host* before overwriting it, so
   // we can decide below whether the kanban needs a re-fetch. (Only host
@@ -91,6 +96,8 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
       implTabPreCreateScript: trimmedImplPre,
       implTabPostCloseScript: trimmedImplPost,
       conflictResolutionProfilePath: trimmedConflictProfile,
+      codexModel: trimmedCodexModel,
+      codexReasoningEffort: trimmedCodexReasoningEffort,
     })
     return
   }
@@ -113,6 +120,8 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
     implTabPreCreateScript: trimmedImplPre,
     implTabPostCloseScript: trimmedImplPost,
     conflictResolutionProfilePath: trimmedConflictProfile,
+    codexModel: trimmedCodexModel,
+    codexReasoningEffort: trimmedCodexReasoningEffort,
     youtrackBaseUrl: trimmedYtBase,
     youtrackProjectShortName: trimmedYtProject,
     youtrackCloseCommand: trimmedYtClose,
@@ -196,6 +205,8 @@ export async function handleEditSettingsRequest(panel: KanbanWebviewPanel): Prom
     implTabPreCreateScript: s.implTabPreCreateScript,
     implTabPostCloseScript: s.implTabPostCloseScript,
     conflictResolutionProfilePath: s.conflictResolutionProfilePath,
+    codexModel: s.codexModel,
+    codexReasoningEffort: s.codexReasoningEffort,
     youtrackBaseUrl: s.youtrackBaseUrl,
     youtrackProjectShortName: s.youtrackProjectShortName,
     youtrackCloseCommand: s.youtrackCloseCommand,