diff --git a/web/src/components/PromptInput.tsx b/web/src/components/PromptInput.tsx
index 1fa225a..ecc0f21 100644
--- a/web/src/components/PromptInput.tsx
+++ b/web/src/components/PromptInput.tsx
@@ -715,12 +715,16 @@ export function PromptInput() {
                   }}
                 >
                   <div className={styles.mentionThumb}>
-                    {ref.type === 'video' ? (
+                    {ref.uploading ? (
+                      <span style={{ fontSize: 12 }}>...</span>
+                    ) : ref.type === 'video' && ref.previewUrl ? (
                       <video src={rewriteTosUrl(ref.previewUrl)} muted className={styles.thumbMedia} />
                     ) : ref.type === 'audio' ? (
                       <span style={{ fontSize: 16 }}>{'\u266B'}</span>
-                    ) : (
+                    ) : ref.previewUrl ? (
                       <img src={tosThumb(ref.previewUrl, 72)} alt="" className={styles.thumbMedia} />
+                    ) : (
+                      <span style={{ fontSize: 12 }}>?</span>
                     )}
                   </div>
                   <span className={styles.mentionLabel}>{ref.label}</span>
diff --git a/web/src/components/UniversalUpload.module.css b/web/src/components/UniversalUpload.module.css
index 09a1ba0..c3d69cc 100644
--- a/web/src/components/UniversalUpload.module.css
+++ b/web/src/components/UniversalUpload.module.css
@@ -282,6 +282,16 @@
   color: var(--color-text-secondary);
 }
 
+.uploadPlaceholder {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--color-overlay-soft);
+  color: var(--color-text-secondary);
+}
+
 /* Upload status overlay */
 .uploadOverlay {
   position: absolute;
diff --git a/web/src/components/UniversalUpload.tsx b/web/src/components/UniversalUpload.tsx
index 5e23475..6939657 100644
--- a/web/src/components/UniversalUpload.tsx
+++ b/web/src/components/UniversalUpload.tsx
@@ -142,28 +142,29 @@ export function UniversalUpload() {
                 }}
               >
                 <div className={styles.thumbInner}>
-                  {ref.type === 'video' ? (
+                  {ref.uploading ? (
+                    <div className={styles.uploadPlaceholder}>
+                      <Spinner />
+                    </div>
+                  ) : ref.uploadError ? (
+                    <div
+                      className={`${styles.uploadPlaceholder} ${styles.uploadError}`}
+                      onClick={(e) => { e.stopPropagation(); retryUpload(ref.id); }}
+                      title="点击重试"
+                    >
+                      <ErrorIcon />
+                    </div>
+                  ) : ref.type === 'video' && ref.previewUrl ? (
                     <video src={rewriteTosUrl(ref.previewUrl)} className={styles.thumbMedia} muted />
                   ) : ref.type === 'audio' ? (
                     <div className={styles.audioPlaceholder}>
                       <AudioIcon />
                     </div>
-                  ) : (
+                  ) : ref.previewUrl ? (
                     <img src={tosThumb(ref.previewUrl, 200)} alt={ref.label} className={styles.thumbMedia} style={{ cursor: 'zoom-in' }} onClick={(e) => { e.stopPropagation(); setLightboxSrc(ref.previewUrl); }} />
-                  )}
-                  {/* Upload status overlay */}
-                  {ref.uploading && (
-                    <div className={styles.uploadOverlay}>
-                      <Spinner />
-                    </div>
-                  )}
-                  {ref.uploadError && (
-                    <div
-                      className={`${styles.uploadOverlay} ${styles.uploadError}`}
-                      onClick={(e) => { e.stopPropagation(); retryUpload(ref.id); }}
-                      title="点击重试"
-                    >
-                      <ErrorIcon />
+                  ) : (
+                    <div className={styles.audioPlaceholder}>
+                      <AudioIcon />
                     </div>
                   )}
                   <div
diff --git a/web/src/store/generation.ts b/web/src/store/generation.ts
index 69bb2b0..115d15e 100644
--- a/web/src/store/generation.ts
+++ b/web/src/store/generation.ts
@@ -55,6 +55,7 @@ function mapProgress(backendStatus: string): number {
 }
 
 const ORPHAN_MATERIAL_MENTION_RE = /@(?:图片|视频|音频|素材)[^\s，。！？、；：,.!?;:)）]*/;
+const RESOURCE_UPLOAD_FAILED_MESSAGE = '资源上传失败，请删除后重新上传';
 
 function findOrphanMaterialMention(input: ReturnType<typeof useInputBarStore.getState>): string | null {
   if (input.mode !== 'universal') return null;
@@ -64,6 +65,57 @@ function findOrphanMaterialMention(input: ReturnType<typeof useInputBarStore.get
   return input.prompt.match(ORPHAN_MATERIAL_MENTION_RE)?.[0] || null;
 }
 
+function isBlobUrl(url?: string): boolean {
+  return !!url && url.startsWith('blob:');
+}
+
+function isOnlineUrl(url?: string): boolean {
+  return !!url && /^https?:\/\//i.test(url);
+}
+
+function isSubmittedMaterialUrl(url?: string): boolean {
+  return isOnlineUrl(url) || !!url?.startsWith('asset://');
+}
+
+function hasBlobResourceInEditorHtml(editorHtml?: string): boolean {
+  return !!editorHtml && editorHtml.includes('blob:');
+}
+
+function hasBlobResourceInAssetMentions(assetMentions?: Record<string, unknown>[]): boolean {
+  return !!assetMentions?.some((mention) =>
+    isBlobUrl(typeof mention.thumbUrl === 'string' ? mention.thumbUrl : undefined)
+  );
+}
+
+function hasBlobResourceBeforeSubmit(input: ReturnType<typeof useInputBarStore.getState>): boolean {
+  if (input.mode !== 'universal') return false;
+  if (hasBlobResourceInEditorHtml(input.editorHtml)) return true;
+  if (hasBlobResourceInAssetMentions(input.assetMentions)) return true;
+  return input.references.some((ref) =>
+    isBlobUrl(ref.previewUrl) || isBlobUrl(ref.tosUrl)
+  );
+}
+
+function hasUnuploadedDirectReference(input: ReturnType<typeof useInputBarStore.getState>): boolean {
+  if (input.mode !== 'universal') return false;
+  return input.references.some((ref) => !isOnlineUrl(ref.tosUrl));
+}
+
+function hasBlobResourceInUploadedRefs(
+  refs: { url: string; thumb_url?: string }[],
+): boolean {
+  return refs.some((ref) => isBlobUrl(ref.url) || isBlobUrl(ref.thumb_url));
+}
+
+function hasInvalidSubmittedMaterialUrl(
+  refs: { url: string; thumb_url?: string }[],
+): boolean {
+  return refs.some((ref) =>
+    !isSubmittedMaterialUrl(ref.url) ||
+    (!!ref.thumb_url && !isOnlineUrl(ref.thumb_url))
+  );
+}
+
 /** Check if a URL is an asset library reference (case-insensitive protocol). */
 function isAssetUrl(url: string): boolean {
   return url.startsWith('asset://') || url.startsWith('Asset://');
@@ -330,6 +382,10 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
       return null;
     }
     if (!input.canSubmit()) return null;
+    if (hasBlobResourceBeforeSubmit(input) || hasUnuploadedDirectReference(input)) {
+      showToast(RESOURCE_UPLOAD_FAILED_MESSAGE);
+      return null;
+    }
 
     // Collect files to upload (or existing TOS URLs for regeneration)
     const filesToUpload: { file?: File; tosUrl?: string; type: 'image' | 'video' | 'audio'; role: string; label: string }[] = [];
@@ -531,6 +587,16 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
         }
       }
 
+      if (hasBlobResourceInUploadedRefs(uploadedRefs) || hasInvalidSubmittedMaterialUrl(uploadedRefs)) {
+        showToast(RESOURCE_UPLOAD_FAILED_MESSAGE);
+        set((s) => ({
+          tasks: s.tasks.map((t) =>
+            t.id === tempId ? { ...t, status: 'failed' as const, progress: 0, errorMessage: RESOURCE_UPLOAD_FAILED_MESSAGE } : t
+          ),
+        }));
+        return null;
+      }
+
       // Call generate API
       const { data: genResult } = await videoApi.generate({
         prompt: input.prompt,
diff --git a/web/src/store/inputBar.ts b/web/src/store/inputBar.ts
index 9dcfd23..79fc093 100644
--- a/web/src/store/inputBar.ts
+++ b/web/src/store/inputBar.ts
@@ -1,7 +1,7 @@
 import { create } from 'zustand';
 import type { CreationMode, ModelOption, AspectRatio, Duration, Resolution, GenerationType, UploadedFile } from '../types';
 import { showToast } from '../components/Toast';
-import { mediaApi } from '../lib/api';
+import { mediaApi, tosThumb } from '../lib/api';
 import { parseAssetMentions } from '../lib/assetMentions';
 
 let fileCounter = 0;
@@ -65,6 +65,70 @@ const MAX_IMAGES = 9;
 const MAX_VIDEOS = 3;
 const MAX_AUDIO = 3;
 
+function isBlobUrl(url?: string): boolean {
+  return !!url && url.startsWith('blob:');
+}
+
+function revokePreviewUrl(url?: string) {
+  if (url && isBlobUrl(url)) URL.revokeObjectURL(url);
+}
+
+function syncEditorReferencePreview(editorHtml: string, refId: string, previewUrl: string): string {
+  if (!editorHtml) return editorHtml;
+  const doc = new DOMParser().parseFromString(`<div>${editorHtml}</div>`, 'text/html');
+  const container = doc.body.firstElementChild as HTMLElement | null;
+  if (!container) return editorHtml;
+
+  let changed = false;
+  container.querySelectorAll('[data-ref-id]').forEach((span) => {
+    const el = span as HTMLElement;
+    if (el.dataset.refId !== refId || el.dataset.refType === 'asset') return;
+    el.dataset.thumbUrl = previewUrl;
+    if (el.dataset.refType !== 'audio') {
+      let img = el.querySelector('img') as HTMLImageElement | null;
+      if (!img) {
+        const newImg = document.createElement('img');
+        newImg.className = 'mentionImg';
+        newImg.setAttribute('width', '16');
+        newImg.setAttribute('height', '16');
+        newImg.style.cssText = 'width:16px;height:16px;border-radius:3px;object-fit:cover;vertical-align:middle;margin-right:3px;display:inline-block;pointer-events:none';
+        newImg.onerror = () => { newImg.style.display = 'none'; };
+        el.insertBefore(newImg, el.firstChild);
+        img = newImg;
+      }
+      img.src = tosThumb(previewUrl, 32);
+    }
+    changed = true;
+  });
+
+  return changed ? container.innerHTML : editorHtml;
+}
+
+function markReferenceUploadSuccess(
+  refs: UploadedFile[],
+  refId: string,
+  uploadedUrl: string,
+  blobUrlsToRevoke: Set<string>,
+): UploadedFile[] {
+  return refs.map((ref) => {
+    if (ref.id !== refId) return ref;
+    if (isBlobUrl(ref.previewUrl)) blobUrlsToRevoke.add(ref.previewUrl);
+    return {
+      ...ref,
+      tosUrl: uploadedUrl,
+      previewUrl: uploadedUrl,
+      uploading: false,
+      uploadError: false,
+    };
+  });
+}
+
+function markReferenceUploadError(refs: UploadedFile[], refId: string): UploadedFile[] {
+  return refs.map((ref) =>
+    ref.id === refId ? { ...ref, uploading: false, uploadError: true } : ref
+  );
+}
+
 interface InputBarState {
   // Generation type
   generationType: GenerationType;
@@ -245,7 +309,7 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
     const state = get();
     const removedRef = state.references.find((r) => r.id === id);
     if (!removedRef) return;
-    if (removedRef.previewUrl) URL.revokeObjectURL(removedRef.previewUrl);
+    revokePreviewUrl(removedRef.previewUrl);
 
     // 删除后同类型的剩余引用按顺序重新编号（即梦逻辑：保持 1/2/3 连续）
     const remaining = state.references.filter((r) => r.id !== id);
@@ -283,7 +347,7 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
   },
   clearReferences: () => {
     const state = get();
-    state.references.forEach((r) => URL.revokeObjectURL(r.previewUrl));
+    state.references.forEach((r) => revokePreviewUrl(r.previewUrl));
     set({ references: [] });
   },
   retryUpload: (refId) => {
@@ -301,7 +365,7 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
   lastFrame: null,
   setFirstFrame: (file) => {
     const state = get();
-    if (state.firstFrame) URL.revokeObjectURL(state.firstFrame.previewUrl);
+    if (state.firstFrame) revokePreviewUrl(state.firstFrame.previewUrl);
     if (file) {
       fileCounter++;
       set({
@@ -319,7 +383,7 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
   },
   setLastFrame: (file) => {
     const state = get();
-    if (state.lastFrame) URL.revokeObjectURL(state.lastFrame.previewUrl);
+    if (state.lastFrame) revokePreviewUrl(state.lastFrame.previewUrl);
     if (file) {
       fileCounter++;
       set({
@@ -391,8 +455,8 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
       });
     } else {
       // Clear keyframe
-      if (state.firstFrame) URL.revokeObjectURL(state.firstFrame.previewUrl);
-      if (state.lastFrame) URL.revokeObjectURL(state.lastFrame.previewUrl);
+      if (state.firstFrame) revokePreviewUrl(state.firstFrame.previewUrl);
+      if (state.lastFrame) revokePreviewUrl(state.lastFrame.previewUrl);
       set({
         mode,
         assetMentions: [],
@@ -412,10 +476,10 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
 
   reset: () => {
     const state = get();
-    state.references.forEach((r) => URL.revokeObjectURL(r.previewUrl));
-    state.prevReferences.forEach((r) => URL.revokeObjectURL(r.previewUrl));
-    if (state.firstFrame) URL.revokeObjectURL(state.firstFrame.previewUrl);
-    if (state.lastFrame) URL.revokeObjectURL(state.lastFrame.previewUrl);
+    state.references.forEach((r) => revokePreviewUrl(r.previewUrl));
+    state.prevReferences.forEach((r) => revokePreviewUrl(r.previewUrl));
+    if (state.firstFrame) revokePreviewUrl(state.firstFrame.previewUrl);
+    if (state.lastFrame) revokePreviewUrl(state.lastFrame.previewUrl);
     set({
       mode: 'universal',
       model: 'seedance_2.0',
@@ -441,16 +505,17 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
 /** Upload a single reference file to TOS and update the store. */
 function _uploadRef(refId: string, file: File) {
   mediaApi.upload(file).then(({ data }) => {
+    const blobUrlsToRevoke = new Set<string>();
     useInputBarStore.setState((s) => ({
-      references: s.references.map((r) =>
-        r.id === refId ? { ...r, tosUrl: data.url, uploading: false, uploadError: false } : r
-      ),
+      references: markReferenceUploadSuccess(s.references, refId, data.url, blobUrlsToRevoke),
+      prevReferences: markReferenceUploadSuccess(s.prevReferences, refId, data.url, blobUrlsToRevoke),
+      editorHtml: syncEditorReferencePreview(s.editorHtml, refId, data.url),
     }));
+    blobUrlsToRevoke.forEach((url) => URL.revokeObjectURL(url));
   }).catch(() => {
     useInputBarStore.setState((s) => ({
-      references: s.references.map((r) =>
-        r.id === refId ? { ...r, uploading: false, uploadError: true } : r
-      ),
+      references: markReferenceUploadError(s.references, refId),
+      prevReferences: markReferenceUploadError(s.prevReferences, refId),
     }));
   });
 }
@@ -501,7 +566,7 @@ async function _validateAndAddImages(files: File[]) {
       id: refId,
       file,
       type: 'image',
-      previewUrl: URL.createObjectURL(file),
+      previewUrl: '',
       label: `图片${existingSameType + 1}`,
       uploading: true,
     };
@@ -601,7 +666,7 @@ async function _validateAndAddMedia(files: File[]) {
       id: refId,
       file,
       type,
-      previewUrl: type === 'audio' ? '' : URL.createObjectURL(file),
+      previewUrl: '',
       label: `${labelPrefix}${existingSameType + 1}`,
       uploading: true,
       duration: Math.round(dur * 10) / 10,