✨ feat(vscode): 设置面板可配头脑风暴/实施/测试会话的默认 profile

三类会话的 profile 此前只有工单级字段，留空就硬编码落到 official，
想整体换模型只能一个工单一个工单改。

设置面板新增三个下拉，与冲突解决/提交/改动说明的 profile 选择同区。
解析链路变成：工单级字段 > 对应的全局默认设置 > getDefaultProfilePath()，
三类之间仍互不回退。新建工单的头脑风暴会话也走同一条链路。

Claude-Session: https://claude.ai/code/session_01REdhpbaNyqWASF2HWsnTFv

vscode/src/panel/handlers/settings.ts

@@ -39,6 +39,9 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
   implTabPreCreateScript: string
   implTabPostCloseScript: string
   splitNewTerminals: boolean
+  defaultBrainstormProfilePath: string
+  defaultImplementProfilePath: string
+  defaultTestProfilePath: string
   conflictResolutionProfilePath: string
   commitProfilePath: string
   prDiffSummaryProfilePath: string
@@ -74,6 +77,10 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
   const trimmedPreRemove = payload.worktreePreRemoveScript.trim()
   const trimmedImplPre = payload.implTabPreCreateScript.trim()
   const trimmedImplPost = payload.implTabPostCloseScript.trim()
+  // 三个会话默认 profile：'' 有意义（= 落到 DEFAULT_PROFILE_PATH），只 trim。
+  const trimmedDefaultBrainstormProfile = payload.defaultBrainstormProfilePath.trim()
+  const trimmedDefaultImplementProfile = payload.defaultImplementProfilePath.trim()
+  const trimmedDefaultTestProfile = payload.defaultTestProfilePath.trim()
   // conflict-resolution profile: '' is meaningful (= DEFAULT_PROFILE_PATH).
   const trimmedConflictProfile = payload.conflictResolutionProfilePath.trim()
   // 提交代码 profile：'' 有意义（= 未配置 → 提交严格失败），只 trim。
@@ -118,6 +125,9 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
       implTabPreCreateScript: trimmedImplPre,
       implTabPostCloseScript: trimmedImplPost,
       splitNewTerminals: payload.splitNewTerminals,
+      defaultBrainstormProfilePath: trimmedDefaultBrainstormProfile,
+      defaultImplementProfilePath: trimmedDefaultImplementProfile,
+      defaultTestProfilePath: trimmedDefaultTestProfile,
       conflictResolutionProfilePath: trimmedConflictProfile,
       commitProfilePath: trimmedCommitProfile,
       prDiffSummaryProfilePath: trimmedPrDiffSummaryProfile,
@@ -147,6 +157,9 @@ export async function handleSettingsSave(panel: KanbanWebviewPanel, payload: {
     implTabPreCreateScript: trimmedImplPre,
     implTabPostCloseScript: trimmedImplPost,
     splitNewTerminals: payload.splitNewTerminals,
+    defaultBrainstormProfilePath: trimmedDefaultBrainstormProfile,
+    defaultImplementProfilePath: trimmedDefaultImplementProfile,
+    defaultTestProfilePath: trimmedDefaultTestProfile,
     conflictResolutionProfilePath: trimmedConflictProfile,
     commitProfilePath: trimmedCommitProfile,
     prDiffSummaryProfilePath: trimmedPrDiffSummaryProfile,
@@ -253,6 +266,9 @@ export async function handleEditSettingsRequest(panel: KanbanWebviewPanel): Prom
     implTabPreCreateScript: s.implTabPreCreateScript,
     implTabPostCloseScript: s.implTabPostCloseScript,
     splitNewTerminals: s.splitNewTerminals,
+    defaultBrainstormProfilePath: s.defaultBrainstormProfilePath,
+    defaultImplementProfilePath: s.defaultImplementProfilePath,
+    defaultTestProfilePath: s.defaultTestProfilePath,
     conflictResolutionProfilePath: s.conflictResolutionProfilePath,
     commitProfilePath,
     prDiffSummaryProfilePath,