feat: 并发文件审查，可配置并行度

handlers/pages.go

@@ -39,9 +39,12 @@ func (h *PageHandler) Generate(c *gin.Context) {
 func (h *PageHandler) Review(c *gin.Context) {
 	topN := "20"
 	h.db.QueryRow(`SELECT value FROM settings WHERE key = 'review.top_n'`).Scan(&topN)
+	concurrency := "5"
+	h.db.QueryRow(`SELECT value FROM settings WHERE key = 'review.concurrency'`).Scan(&concurrency)
 	c.HTML(http.StatusOK, "pages/review.html", gin.H{
 		"ID":          c.Param("id"),
 		"TopN":        topN,
+		"Concurrency": concurrency,
 	})
 }
 

handlers/review.go

@@ -41,6 +41,7 @@ func (h *ReviewHandler) Review(c *gin.Context) {
 		Base        string `json:"base" binding:"required"`
 		Head        string `json:"head" binding:"required"`
 		TopN        *int   `json:"top_n"`
+		Concurrency *int   `json:"concurrency"`
 	}
 	if err := c.ShouldBindJSON(&req); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "base and head are required"})
@@ -61,6 +62,20 @@ func (h *ReviewHandler) Review(c *gin.Context) {
 		}
 	}
 
+	// Determine concurrency: request value > settings default (5)
+	concurrency := 5
+	if req.Concurrency != nil {
+		concurrency = *req.Concurrency
+	} else {
+		var concStr string
+		h.db.QueryRow(`SELECT value FROM settings WHERE key = 'review.concurrency'`).Scan(&concStr)
+		if concStr != "" {
+			if n, err := strconv.Atoi(concStr); err == nil && n > 0 {
+				concurrency = n
+			}
+		}
+	}
+
 	// Set SSE headers
 	c.Header("Content-Type", "text/event-stream")
 	c.Header("Cache-Control", "no-cache")
@@ -84,7 +99,7 @@ func (h *ReviewHandler) Review(c *gin.Context) {
 	h.db.Exec(`UPDATE repositories SET last_used = datetime('now') WHERE id = ?`, id)
 
 	// Run AI review
-	reviewResult, err := services.GenerateReview(h.db, localPath, req.Base, req.Head, topN, sendEvent)
+	reviewResult, err := services.GenerateReview(h.db, localPath, req.Base, req.Head, topN, concurrency, sendEvent)
 	if err != nil {
 		sendEvent("error", map[string]interface{}{"message": err.Error()})
 		return

models/settings.go

@@ -5,6 +5,7 @@ var DefaultSettings = map[string]string{
 	"llm.api_key":       "",
 	"llm.model":         "gpt-4o",
 	"review.top_n":      "20",
+	"review.concurrency": "5",
 	"cache.max_age_days": "7",
 	"cache.max_size_mb":  "5000",
 }

services/review.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"sort"
 	"strings"
+	"sync"
 
 	goopenai "github.com/sashabaranov/go-openai"
 )
@@ -57,7 +58,7 @@ func countDiffLines(patch string) int {
 // GenerateReview performs AI code review on diff files with Top-N strategy.
 // It streams events (file_start, suggestion, file_end, summary, done) via callback
 // and returns the complete ReviewResult for persistence.
-func GenerateReview(db *sql.DB, repoPath, base, head string, topN int, callback StreamCallback) (*ReviewResult, error) {
+func GenerateReview(db *sql.DB, repoPath, base, head string, topN, concurrency int, callback StreamCallback) (*ReviewResult, error) {
 	// Read LLM config
 	config, err := GetLLMConfig(db)
 	if err != nil {
@@ -107,21 +108,45 @@ func GenerateReview(db *sql.DB, repoPath, base, head string, topN int, callback
 		})
 	}
 
-	// Review each file
+	// Review each file concurrently (max 5 workers)
-	var fileReviews []FileReview
+	fileReviews := make([]FileReview, reviewedFiles)
-	for i, file := range files {
+	var mu sync.Mutex
+	if concurrency < 1 {
+		concurrency = 1
+	}
+	sem := make(chan struct{}, concurrency)
+	var wg sync.WaitGroup
+
+	// Thread-safe callback wrapper — all SSE writes go through this
+	safeCallback := callback
 	if callback != nil {
-			callback("file_start", map[string]interface{}{
+		safeCallback = func(event string, data interface{}) {
-				"file":  file.Filename,
+			mu.Lock()
-				"index": i + 1,
+			defer mu.Unlock()
+			callback(event, data)
+		}
+	}
+
+	for i, file := range files {
+		wg.Add(1)
+		go func(idx int, f FileDiff) {
+			defer wg.Done()
+			sem <- struct{}{}        // acquire slot
+			defer func() { <-sem }() // release slot
+
+			// Send file_start (order doesn't matter, frontend tracks by filename)
+			if safeCallback != nil {
+				safeCallback("file_start", map[string]interface{}{
+					"file":  f.Filename,
+					"index": idx + 1,
 					"total": reviewedFiles,
 				})
 			}
 
-		changeLines := countDiffLines(file.Patch)
+			changeLines := countDiffLines(f.Patch)
 
 			// Truncate per-file diff if too large
-		patch := file.Patch
+			patch := f.Patch
 			if len(patch) > 30000 {
 				patch = patch[:30000] + "\n\n... [diff truncated due to size]"
 			}
@@ -151,41 +176,38 @@ func GenerateReview(db *sql.DB, repoPath, base, head string, topN int, callback
 - info: 提示信息（最佳实践、可选优化）
 
 如果代码没有问题，输出空数组 []。
-请用中文回复。`, file.Filename, changeLines/2+changeLines%2, changeLines/2, patch)
+请用中文回复。`, f.Filename, changeLines/2+changeLines%2, changeLines/2, patch)
 
 			messages := []goopenai.ChatCompletionMessage{
 				{Role: goopenai.ChatMessageRoleUser, Content: prompt},
 			}
 
 			// Call LLM
-		fullResponse, err := ChatStream(config, messages, callback)
+			fullResponse, err := ChatStream(config, messages, safeCallback)
 			if err != nil {
-			// Continue with other files on error
+				if safeCallback != nil {
-			if callback != nil {
+					safeCallback("error", map[string]interface{}{
-				callback("error", map[string]interface{}{
+						"file":    f.Filename,
-					"file":    file.Filename,
 						"message": err.Error(),
 					})
 				}
-			fileReviews = append(fileReviews, FileReview{
+				fileReviews[idx] = FileReview{
-				FileName:    file.Filename,
+					FileName:    f.Filename,
 					ChangeLines: changeLines,
 					Suggestions: nil,
 					RawReview:   fmt.Sprintf("Error: %s", err.Error()),
-			})
+				}
-			continue
+				return
 			}
 
 			// Parse suggestions
 			jsonStr := extractJSON(fullResponse)
 			var suggestions []ReviewSuggestion
 			if err := json.Unmarshal([]byte(jsonStr), &suggestions); err != nil {
-			// If parsing fails, try single object
 				var single ReviewSuggestion
 				if err2 := json.Unmarshal([]byte(jsonStr), &single); err2 == nil {
 					suggestions = []ReviewSuggestion{single}
 				} else {
-				// Fall back to raw text as info suggestion
 					suggestions = []ReviewSuggestion{{
 						Severity:    "info",
 						Description: fullResponse,
@@ -194,12 +216,11 @@ func GenerateReview(db *sql.DB, repoPath, base, head string, topN int, callback
 			}
 
 			// Validate severity values
-		for i := range suggestions {
+			for j := range suggestions {
-			switch suggestions[i].Severity {
+				switch suggestions[j].Severity {
 				case "critical", "warning", "info":
-				// valid
 				default:
-				suggestions[i].Severity = "info"
+					suggestions[j].Severity = "info"
 				}
 			}
 
@@ -212,27 +233,30 @@ func GenerateReview(db *sql.DB, repoPath, base, head string, topN int, callback
 				if s.CodeExample != "" {
 					content += "\n\n```\n" + s.CodeExample + "\n```"
 				}
-			if callback != nil {
+				if safeCallback != nil {
-				callback("suggestion", map[string]interface{}{
+					safeCallback("suggestion", map[string]interface{}{
-					"file":     file.Filename,
+						"file":     f.Filename,
 						"severity": s.Severity,
 						"content":  content,
 					})
 				}
 			}
 
-		fileReviews = append(fileReviews, FileReview{
+			fileReviews[idx] = FileReview{
-			FileName:    file.Filename,
+				FileName:    f.Filename,
 				ChangeLines: changeLines,
 				Suggestions: suggestions,
 				RawReview:   fullResponse,
-		})
+			}
 
-		if callback != nil {
+			if safeCallback != nil {
-			callback("file_end", map[string]interface{}{"file": file.Filename})
+				safeCallback("file_end", map[string]interface{}{"file": f.Filename})
 			}
+		}(i, file)
 	}
 
+	wg.Wait()
+
 	// Generate summary
 	var summary ReviewSummary
 	if len(fileReviews) > 0 {

templates/pages/review.html

@@ -18,7 +18,7 @@
         <h1 class="text-2xl font-bold text-gray-900 mb-6">AI 代码审查</h1>
 
         <div class="bg-white rounded-lg shadow-md p-6 mb-6">
-            <div class="grid grid-cols-3 gap-4 mb-4">
+            <div class="grid grid-cols-4 gap-4 mb-4">
                 <div>
                     <label class="block text-sm font-medium text-gray-700 mb-1">Base</label>
                     <select id="base-ref" class="w-full border rounded-md px-3 py-2" required>
@@ -37,6 +37,12 @@
                            placeholder="留空=全部">
                     <p class="text-xs text-gray-400 mt-1">设为 0 分析全部文件</p>
                 </div>
+                <div>
+                    <label class="block text-sm font-medium text-gray-700 mb-1">并发分析数</label>
+                    <input type="number" id="concurrency" value="{{.Concurrency}}" min="1" max="20" class="w-full border rounded-md px-3 py-2"
+                           placeholder="默认 5">
+                    <p class="text-xs text-gray-400 mt-1">同时分析的文件数 (1-20)</p>
+                </div>
             </div>
             <button onclick="startReview()" id="btn-review" class="w-full bg-purple-600 text-white py-2 px-4 rounded-md hover:bg-purple-700">
                 开始审查
@@ -254,10 +260,13 @@
             let completedFiles = 0;
             let currentFile = '';
 
+            const concurrency = document.getElementById('concurrency').value;
+
             currentSSE = SSE.post(`/api/repos/${repoId}/review`, {
                 base: baseRef,
                 head: headRef,
                 top_n: parseInt(topN) || 0,
+                concurrency: parseInt(concurrency) || 5,
             }, {
                 start(data) {
                     totalFiles = data.total_files || 0;

templates/pages/settings.html

@@ -32,12 +32,20 @@
                 <!-- Review Settings -->
                 <div class="bg-white rounded-lg shadow-sm border border-gray-200 p-6">
                     <h2 class="text-lg font-semibold mb-4">审查配置</h2>
+                    <div class="space-y-4">
                         <div>
                             <label class="block text-sm font-medium text-gray-700 mb-1">Top-N 文件数</label>
                             <p class="text-xs text-gray-400 mb-2">大 diff 时优先分析变更最大的 N 个文件，设为 0 分析全部</p>
                             <input type="number" name="review.top_n" value="{{index .Settings "review.top_n"}}" min="0"
                                    class="w-full rounded-md border border-gray-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-indigo-500">
                         </div>
+                        <div>
+                            <label class="block text-sm font-medium text-gray-700 mb-1">并发分析数</label>
+                            <p class="text-xs text-gray-400 mb-2">同时向 LLM 发送的文件评审请求数，越大越快但占用更多 API 额度</p>
+                            <input type="number" name="review.concurrency" value="{{index .Settings "review.concurrency"}}" min="1" max="20"
+                                   class="w-full rounded-md border border-gray-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-indigo-500">
+                        </div>
+                    </div>
                 </div>
                 <!-- Cache Settings -->
                 <div class="bg-white rounded-lg shadow-sm border border-gray-200 p-6">