♻️ refactor(vscode): claude 会话命令收口到 buildCcCommand 并移除已卸载的 serena --system-prompt

9 处手拼的 claude 启动命令（managedSessions/sessions/issues）统一改用新增的
cc/ccCommand.ts:buildCcCommand({ profilePath, effort?, resumeSessionId?, prompt? }），
去掉各处重复的 --system-prompt="$(serena prompts ...)"（serena 已卸载）。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

vscode/src/panel/handlers/issues.ts

@@ -10,6 +10,7 @@ import * as path from 'node:path'
 import { resolveWorktreePath } from '../../git/worktree'
 import { commands, env, ThemeColor, Uri, window, workspace } from 'vscode'
 import { getToken } from '../../auth/secrets'
+import { buildCcCommand } from '../../cc/ccCommand'
 import { getBrainstormPrompt } from '../../cc/prompts'
 import { projectsDirFor, watchForNewSession } from '../../cc/sessionWatcher'
 import { spawnClaude } from '../../cc/spawnClaude'
@@ -1283,7 +1284,7 @@ export async function handleIssueCreate(
     createdAt: Date.now(),
   })
 
-  const cmd = `claude --dangerously-skip-permissions --settings '${effectiveProfilePath}' --system-prompt="$(serena prompts print-cc-system-prompt-override)" '${prompt}'`
+  const cmd = buildCcCommand({ profilePath: effectiveProfilePath, prompt })
   terminal.sendText(cmd)
   logger.add({
     level: 'info',