fix(start-develop-task-dialog): improve branch selection logic and handle project changes more effectively

Author: 杨纲

frontend/src/components/console/project/start-develop-task-dialog.tsx

@@ -12,7 +12,7 @@ import { Spinner } from "@/components/ui/spinner"
 import { getBrandFromModelName, getInterfaceTypeBadge, getModelHealthBadge, getOwnerTypeBadge, selectHost, selectImage, selectModel } from "@/utils/common"
 import { apiRequest } from "@/utils/requestUtils"
 import { IconSparkles } from "@tabler/icons-react"
-import { useState, useEffect, useMemo } from "react"
+import { useState, useEffect, useMemo, useRef } from "react"
 import { useNavigate } from "react-router-dom"
 import { toast } from "sonner"
 
@@ -79,15 +79,14 @@ export default function StartDevelopTaskDialog({
         if (resp.code === 0 && resp.data) {
           const branchList = resp.data.map((b: DomainBranch) => b.name || '').filter(Boolean)
           setBranches(branchList)
-          
-          // 优先选择 main 或 master，否则选择第一个
-          if (branchList.includes('main')) {
-            setSelectedBranch('main')
-          } else if (branchList.includes('master')) {
-            setSelectedBranch('master')
-          } else if (branchList.length > 0) {
-            setSelectedBranch(branchList[0])
-          }
+
+          // 仅在当前选择不存在时才重置，避免轮询刷新覆盖用户选择
+          setSelectedBranch((prev) => {
+            if (prev && branchList.includes(prev)) return prev
+            if (branchList.includes('main')) return 'main'
+            if (branchList.includes('master')) return 'master'
+            return branchList[0] || ''
+          })
         } else {
           toast.error('获取分支列表失败: ' + resp.message)
         }
@@ -100,13 +99,28 @@ export default function StartDevelopTaskDialog({
     }
   }
 
+  const prevOpenRef = useRef<boolean>(false)
+  const prevProjectIdRef = useRef<string | undefined>(undefined)
+
   useEffect(() => {
-    if (open) {
+    if (!open) {
+      prevOpenRef.current = false
+      return
+    }
+
+    const projectId = project?.id
+    const firstOpen = !prevOpenRef.current
+    const projectChanged = projectId && projectId !== prevProjectIdRef.current
+
+    if (firstOpen || projectChanged) {
       fetchBranches()
       setUserMessage('')
       setSelectedModelId(selectModel(modelsWithEconomy, true))
     }
-  }, [open, project, modelsWithEconomy])
+
+    prevOpenRef.current = true
+    prevProjectIdRef.current = projectId
+  }, [open, project?.id, modelsWithEconomy])
 
   const handleSubmit = async () => {
     if (!userMessage.trim()) {