diff --git a/app/static/public/js/imagine_workbench.js b/app/static/public/js/imagine_workbench.js
index 0e50cb8..c465ce3 100644
--- a/app/static/public/js/imagine_workbench.js
+++ b/app/static/public/js/imagine_workbench.js
@@ -969,22 +969,55 @@
     renderReferenceStrip();
   }
 
+  function inferImageMimeFromName(name) {
+    const lower = String(name || '').trim().toLowerCase();
+    if (lower.endsWith('.png')) return 'image/png';
+    if (lower.endsWith('.jpg') || lower.endsWith('.jpeg')) return 'image/jpeg';
+    if (lower.endsWith('.webp')) return 'image/webp';
+    if (lower.endsWith('.gif')) return 'image/gif';
+    if (lower.endsWith('.bmp')) return 'image/bmp';
+    if (lower.endsWith('.svg')) return 'image/svg+xml';
+    if (lower.endsWith('.avif')) return 'image/avif';
+    if (lower.endsWith('.heic')) return 'image/heic';
+    if (lower.endsWith('.heif')) return 'image/heif';
+    if (lower.endsWith('.tif') || lower.endsWith('.tiff')) return 'image/tiff';
+    if (lower.endsWith('.ico')) return 'image/x-icon';
+    return '';
+  }
+
+  function normalizeImageFile(file, fallbackMime = '') {
+    if (!(file instanceof Blob)) return null;
+    const detectedMime = String(file.type || fallbackMime || inferImageMimeFromName(file.name) || '').trim();
+    if (!detectedMime.startsWith('image/')) return null;
+    if (String(file.type || '').trim()) {
+      return file;
+    }
+    const safeName = String(file.name || '').trim() || `clipboard.${detectedMime.split('/')[1] || 'png'}`;
+    try {
+      return new File([file], safeName, { type: detectedMime });
+    } catch (e) {
+      const blob = file.slice(0, file.size, detectedMime);
+      blob.name = safeName;
+      return blob;
+    }
+  }
+
   function pickImageFilesFromDataTransfer(dataTransfer) {
     if (!dataTransfer) return [];
     const files = [];
-    const pushIfImage = (file) => {
-      if (!file) return;
-      if (!String(file.type || '').startsWith('image/')) return;
-      files.push(file);
+    const pushIfImage = (file, fallbackMime = '') => {
+      const normalized = normalizeImageFile(file, fallbackMime);
+      if (!normalized) return;
+      files.push(normalized);
     };
     if (dataTransfer.files && dataTransfer.files.length) {
-      Array.from(dataTransfer.files).forEach(pushIfImage);
+      Array.from(dataTransfer.files).forEach((file) => pushIfImage(file));
     }
-    if (!files.length && dataTransfer.items && dataTransfer.items.length) {
+    if (dataTransfer.items && dataTransfer.items.length) {
       Array.from(dataTransfer.items).forEach((item) => {
         if (!item || item.kind !== 'file') return;
         const file = item.getAsFile ? item.getAsFile() : null;
-        pushIfImage(file);
+        pushIfImage(file, String(item.type || '').trim());
       });
     }
     return files;
@@ -1007,14 +1040,14 @@
 
     let added = 0;
     for (const file of targets) {
-      const mimeType = String(file.type || '');
-      if (mimeType && !mimeType.startsWith('image/')) continue;
-      const dataUrl = await readFileAsDataUrl(file);
+      const normalizedFile = normalizeImageFile(file);
+      if (!normalizedFile) continue;
+      const dataUrl = await readFileAsDataUrl(normalizedFile);
       if (!dataUrl.startsWith('data:image/')) continue;
       state.referenceImages.push({
         id: buildRefId(),
-        name: file.name || source || '未命名图片',
-        mime: file.type || '',
+        name: normalizedFile.name || source || '未命名图片',
+        mime: normalizedFile.type || '',
         data: dataUrl,
         source: source || 'upload',
         isPrimary: false,
diff --git a/app/static/public/js/video.js b/app/static/public/js/video.js
index 992e7f4..aabee5b 100644
--- a/app/static/public/js/video.js
+++ b/app/static/public/js/video.js
@@ -1256,6 +1256,39 @@
     });
   }
 
+  function inferImageMimeFromName(name) {
+    const lower = String(name || '').trim().toLowerCase();
+    if (lower.endsWith('.png')) return 'image/png';
+    if (lower.endsWith('.jpg') || lower.endsWith('.jpeg')) return 'image/jpeg';
+    if (lower.endsWith('.webp')) return 'image/webp';
+    if (lower.endsWith('.gif')) return 'image/gif';
+    if (lower.endsWith('.bmp')) return 'image/bmp';
+    if (lower.endsWith('.svg')) return 'image/svg+xml';
+    if (lower.endsWith('.avif')) return 'image/avif';
+    if (lower.endsWith('.heic')) return 'image/heic';
+    if (lower.endsWith('.heif')) return 'image/heif';
+    if (lower.endsWith('.tif') || lower.endsWith('.tiff')) return 'image/tiff';
+    if (lower.endsWith('.ico')) return 'image/x-icon';
+    return '';
+  }
+
+  function normalizeImageFile(file, fallbackMime = '') {
+    if (!(file instanceof Blob)) return null;
+    const detectedMime = String(file.type || fallbackMime || inferImageMimeFromName(file.name) || '').trim();
+    if (!detectedMime.startsWith('image/')) return null;
+    if (String(file.type || '').trim()) {
+      return file;
+    }
+    const safeName = String(file.name || '').trim() || `clipboard.${detectedMime.split('/')[1] || 'png'}`;
+    try {
+      return new File([file], safeName, { type: detectedMime });
+    } catch (e) {
+      const blob = file.slice(0, file.size, detectedMime);
+      blob.name = safeName;
+      return blob;
+    }
+  }
+
   function hasFiles(dataTransfer) {
     if (!dataTransfer) return false;
     if (dataTransfer.files && dataTransfer.files.length > 0) return true;
@@ -1267,19 +1300,19 @@
   function pickImageFilesFromDataTransfer(dataTransfer) {
     if (!dataTransfer) return [];
     const files = [];
-    const pushIfImage = (file) => {
-      if (!file) return;
-      if (!String(file.type || '').startsWith('image/')) return;
-      files.push(file);
+    const pushIfImage = (file, fallbackMime = '') => {
+      const normalized = normalizeImageFile(file, fallbackMime);
+      if (!normalized) return;
+      files.push(normalized);
     };
     if (dataTransfer.files && dataTransfer.files.length) {
-      Array.from(dataTransfer.files).forEach(pushIfImage);
+      Array.from(dataTransfer.files).forEach((file) => pushIfImage(file));
     }
-    if (!files.length && dataTransfer.items && dataTransfer.items.length) {
+    if (dataTransfer.items && dataTransfer.items.length) {
       Array.from(dataTransfer.items).forEach((item) => {
         if (!item || item.kind !== 'file') return;
         const file = item.getAsFile ? item.getAsFile() : null;
-        pushIfImage(file);
+        pushIfImage(file, String(item.type || '').trim());
       });
     }
     return files;
@@ -1301,11 +1334,9 @@
     const accepted = targets.slice(0, slotsLeft);
     let added = 0;
     for (const file of accepted) {
-      const mimeType = String(file.type || '');
-      if (mimeType && !mimeType.startsWith('image/')) {
-        continue;
-      }
-      const dataUrl = await readFileAsDataUrl(file);
+      const normalizedFile = normalizeImageFile(file);
+      if (!normalizedFile) continue;
+      const dataUrl = await readFileAsDataUrl(normalizedFile);
       if (!dataUrl.startsWith('data:image/')) {
         continue;
       }
@@ -1315,7 +1346,7 @@
         sourceUrl: dataUrl,
         url: dataUrl,
         parentPostId: '',
-        name: file.name || sourceLabel || '已选择图片',
+        name: normalizedFile.name || sourceLabel || '已选择图片',
         mentionLabel: getReferenceMentionLabel(referenceImages.length)
       });
       added += 1;