diff --git a/static/src/app/bootstrap.ts b/static/src/app/bootstrap.ts
index 89c4f40..36addb7 100644
--- a/static/src/app/bootstrap.ts
+++ b/static/src/app/bootstrap.ts
@@ -730,23 +730,6 @@ function renderShowImages(root: ParentNode | null = document) {
     });
 
     let persistent = showHtmlPersistentRenderByPath.get(pathKey);
-    if (!persistent && effectiveEncoded && inStreaming) {
-      // 精确匹配
-      let ep = showHtmlPersistentByEncoded.get(effectiveEncoded);
-      // 前缀匹配：多条渲染源可能输出不同阶段的 encoded，用最长前缀匹配找到 COMPLETE 的 wrapper
-      if (!ep) {
-        let bestLen = 0;
-        for (const [key, val] of showHtmlPersistentByEncoded) {
-          if (key.startsWith(effectiveEncoded) && key.length > bestLen) {
-            ep = val; bestLen = key.length;
-          }
-        }
-      }
-      if (ep) {
-        persistent = { encoded: ep.encoded, ratioKey: ep.ratioKey, widthPx: ep.widthPx, heightPx: ep.heightPx, wrapper: ep.wrapper, host: ep.host, root: ep.root };
-        showHtmlPersistentRenderByPath.set(pathKey, persistent);
-      }
-    }
     if (!persistent) {
       const wrapper = document.createElement('div');
       wrapper.className = 'chat-inline-card chat-inline-card--html chat-inline-html';
@@ -824,12 +807,6 @@ function renderShowImages(root: ParentNode | null = document) {
       persistent.widthPx = widthPx;
       persistent.heightPx = heightPx;
       persistent.ratioKey = ratioKey;
-      if (effectiveEncoded && inStreaming) {
-        showHtmlPersistentByEncoded.set(effectiveEncoded, {
-          wrapper: persistent.wrapper, host: persistent.host, root: persistent.root,
-          encoded: effectiveEncoded, ratioKey, widthPx, heightPx
-        });
-      }
       debugShowHtmlLog('render:node-persistent-update', {
         renderId,
         pathKey,
@@ -919,10 +896,6 @@ const showHtmlPersistentRenderByPath = new Map<
     root: HTMLElement
   }
 >();
-const showHtmlPersistentByEncoded = new Map<string, {
-  wrapper: HTMLElement, host: HTMLElement, root: HTMLElement,
-  encoded: string, ratioKey: string, widthPx: number, heightPx: number
-}>();
 const showHtmlJsPendingRenderByPath = new Map<
   string,
   {
@@ -1248,7 +1221,6 @@ export function teardownShowImageObserver() {
   showHtmlCompletedSnapshotByPath.clear();
   showHtmlStreamingSizeLockByPath.clear();
   showHtmlPersistentRenderByPath.clear();
-  showHtmlPersistentByEncoded.clear();
   showHtmlJsPendingRenderByPath.clear();
   showHtmlJsIframeRenderByPath.clear();
   showTagObservedContainer = null;