diff --git a/lib/ai/smart-analyzer.ts b/lib/ai/smart-analyzer.ts
index 68037d590..12519d7da 100644
--- a/lib/ai/smart-analyzer.ts
+++ b/lib/ai/smart-analyzer.ts
@@ -238,10 +238,34 @@ const ANALYZER_SYSTEM_PROMPT = `你是一个友好的AI图片编辑助手。用
   "needsClarification": false
 }`;
 
+function getEnvInt(name: string, fallback: number, min: number, max: number): number {
+  const raw = process.env[name];
+  const parsed = raw ? Number.parseInt(raw, 10) : Number.NaN;
+  if (!Number.isFinite(parsed)) return fallback;
+  return Math.max(min, Math.min(max, parsed));
+}
+
 const ANALYZER_MAX_IMAGE_COUNT = 2;
 const ANALYZER_IMAGE_MAX_SIDE = 500;
 const ANALYZER_TIMEOUT_MS = 120000;
-const ANALYZER_IMAGE_FETCH_TIMEOUT_MS = ANALYZER_TIMEOUT_MS;
+const ANALYZER_IMAGE_FETCH_TIMEOUT_MS = getEnvInt(
+  "AGENT_IMAGE_FETCH_TIMEOUT_MS",
+  15000,
+  3000,
+  60000,
+);
+const ANALYZER_QWEN_FALLBACK_TIMEOUT_MS = getEnvInt(
+  "AGENT_QWEN_FALLBACK_TIMEOUT_MS",
+  35000,
+  10000,
+  90000,
+);
+const ANALYZER_QWEN_FALLBACK_RETRIES = getEnvInt(
+  "AGENT_QWEN_FALLBACK_RETRIES",
+  0,
+  0,
+  1,
+);
 const ZHIPU_VISION_MODEL_CANDIDATES = [
   "glm-4.6v-flash",
   "glm-4.6v",
@@ -375,12 +399,13 @@ async function getQwen3VlFallbackImageCandidates(imageUrls?: string[]): Promise<
   const firstImageUrl = (imageUrls || []).find((url) => isHttpUrl(url));
   if (!firstImageUrl) return [];
 
-  const candidates: string[] = [firstImageUrl];
+  const candidates: string[] = [];
   const inlineDataUrl = await toAnalyzerDataUrl(firstImageUrl);
   if (inlineDataUrl) {
     candidates.push(inlineDataUrl);
   }
-  return candidates;
+  candidates.push(firstImageUrl);
+  return Array.from(new Set(candidates));
 }
 
 async function analyzeWithHardcodedQwen3VlFallback(params: {
@@ -434,8 +459,8 @@ async function analyzeWithHardcodedQwen3VlFallback(params: {
           prompt,
           temperature: 0.1,
           maxTokens: 360,
-          timeoutMs: ANALYZER_TIMEOUT_MS,
-          retries: 1,
+          timeoutMs: ANALYZER_QWEN_FALLBACK_TIMEOUT_MS,
+          retries: ANALYZER_QWEN_FALLBACK_RETRIES,
         });
         const parsed = parseAnalysisResultFromModelText(
           fallbackText,
@@ -486,8 +511,8 @@ async function summarizeWithHardcodedQwen3VlFallback(params: {
           prompt,
           temperature: 0.1,
           maxTokens: 140,
-          timeoutMs: ANALYZER_TIMEOUT_MS,
-          retries: 1,
+          timeoutMs: ANALYZER_QWEN_FALLBACK_TIMEOUT_MS,
+          retries: ANALYZER_QWEN_FALLBACK_RETRIES,
         });
         const normalized = normalizeVisualSummaryText(text);
         if (normalized && !isWeakVisualSummary(normalized)) {