fix(ui): add batch bar exit animation and chunked diff cards

src/components/config/DiffModal.module.scss

@@ -12,57 +12,92 @@
 .content {
   display: flex;
   flex-direction: column;
-  gap: $spacing-sm;
   height: 70vh;
   min-height: 420px;
 }
 
-.columnLabels {
+.emptyState {
+  flex: 1;
+  border: 1px dashed var(--border-color);
+  border-radius: $radius-md;
+  background: var(--bg-secondary);
+  color: var(--text-secondary);
+  font-size: 14px;
+  display: grid;
+  place-items: center;
+}
+
+.diffList {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-sm;
+  overflow: auto;
+  padding-right: 2px;
+}
+
+.diffCard {
+  border: 1px solid var(--border-color);
+  border-radius: $radius-md;
+  background: var(--bg-secondary);
+  overflow: hidden;
+}
+
+.diffCardHeader {
+  padding: 8px 10px;
+  border-bottom: 1px dashed var(--border-color);
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--text-secondary);
+  background: color-mix(in srgb, var(--bg-primary) 92%, transparent);
+}
+
+.diffColumns {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: $spacing-sm;
-  font-size: 12px;
-  color: var(--text-secondary);
-  font-weight: 600;
-
-  span {
-    padding: 0 2px;
-  }
+  padding: $spacing-sm;
 }
 
-.mergeRoot {
-  flex: 1;
-  min-height: 0;
+.diffColumn {
+  min-width: 0;
   border: 1px solid var(--border-color);
-  border-radius: $radius-md;
+  border-radius: $radius-sm;
   overflow: hidden;
+  background: var(--bg-primary);
+}
+
+.diffColumnHeader {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: $spacing-sm;
+  padding: 8px 10px;
+  border-bottom: 1px solid var(--border-color);
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--text-secondary);
   background: var(--bg-secondary);
+}
 
-  :global(.cm-mergeView) {
-    height: 100%;
-    overflow: auto !important;
-    -webkit-overflow-scrolling: touch;
-    background: var(--bg-primary);
-  }
+.lineRange {
+  font-size: 11px;
+  color: var(--text-tertiary);
+  font-family: 'Consolas', 'Monaco', 'Menlo', monospace;
+}
 
-  :global(.cm-mergeViewEditors) {
-    min-height: 100%;
-  }
-
-  :global(.cm-mergeViewEditor) {
-    height: 100%;
-  }
-
-  :global(.cm-gutters) {
-    background: var(--bg-secondary);
-    border-right: 1px solid var(--border-color);
-  }
-
-  :global(.cm-mergeGap) {
-    background: var(--bg-secondary);
-    border-left: 1px solid var(--border-color);
-    border-right: 1px solid var(--border-color);
-  }
+.codeBlock {
+  margin: 0;
+  padding: 10px;
+  font-size: 12px;
+  line-height: 1.5;
+  color: var(--text-primary);
+  white-space: pre-wrap;
+  word-break: break-word;
+  font-family: 'Consolas', 'Monaco', 'Menlo', monospace;
+  overflow: auto;
+  max-height: 240px;
 }
 
 @include mobile {
@@ -70,4 +105,8 @@
     height: 65vh;
     min-height: 360px;
   }
+
+  .diffColumns {
+    grid-template-columns: 1fr;
+  }
 }

src/components/config/DiffModal.tsx

@@ -1,12 +1,9 @@
-import { useEffect, useRef } from 'react';
+import { useMemo } from 'react';
 import { useTranslation } from 'react-i18next';
-import { EditorState } from '@codemirror/state';
-import { EditorView } from '@codemirror/view';
-import { yaml } from '@codemirror/lang-yaml';
-import { MergeView } from '@codemirror/merge';
+import { Text } from '@codemirror/state';
+import { Chunk } from '@codemirror/merge';
 import { Modal } from '@/components/ui/Modal';
 import { Button } from '@/components/ui/Button';
-import { useThemeStore } from '@/stores';
 import styles from './DiffModal.module.scss';
 
 type DiffModalProps = {
@@ -18,6 +15,35 @@ type DiffModalProps = {
   loading?: boolean;
 };
 
+type DiffChunkCard = {
+  id: string;
+  currentLines: string;
+  modifiedLines: string;
+  currentText: string;
+  modifiedText: string;
+};
+
+const clampPos = (doc: Text, pos: number) => Math.max(0, Math.min(pos, doc.length));
+
+const getLineRangeLabel = (doc: Text, from: number, to: number): string => {
+  const start = clampPos(doc, from);
+  const end = clampPos(doc, to);
+  if (start === end) {
+    const linePos = Math.min(start, doc.length);
+    return String(doc.lineAt(linePos).number);
+  }
+  const startLine = doc.lineAt(start).number;
+  const endLine = doc.lineAt(Math.max(start, end - 1)).number;
+  return startLine === endLine ? String(startLine) : `${startLine}-${endLine}`;
+};
+
+const getChunkText = (doc: Text, from: number, to: number): string => {
+  const start = clampPos(doc, from);
+  const end = clampPos(doc, to);
+  if (start >= end) return '';
+  return doc.sliceString(start, end).trimEnd();
+};
+
 export function DiffModal({
   open,
   original,
@@ -27,50 +53,20 @@ export function DiffModal({
   loading = false
 }: DiffModalProps) {
   const { t } = useTranslation();
-  const resolvedTheme = useThemeStore((state) => state.resolvedTheme);
-  const mergeContainerRef = useRef<HTMLDivElement>(null);
-  const mergeViewRef = useRef<MergeView | null>(null);
 
-  useEffect(() => {
-    if (!open || !mergeContainerRef.current) return;
+  const diffCards = useMemo<DiffChunkCard[]>(() => {
+    const currentDoc = Text.of(original.split('\n'));
+    const modifiedDoc = Text.of(modified.split('\n'));
+    const chunks = Chunk.build(currentDoc, modifiedDoc);
 
-    const mountEl = mergeContainerRef.current;
-    mountEl.innerHTML = '';
-
-    const commonExtensions = [
-      yaml(),
-      EditorState.readOnly.of(true),
-      EditorView.editable.of(false),
-      EditorView.lineWrapping,
-      EditorView.theme(
-        {
-          '&': { height: '100%' },
-          '.cm-scroller': {
-            fontFamily: "'Consolas', 'Monaco', 'Menlo', monospace"
-          }
-        },
-        { dark: resolvedTheme === 'dark' }
-      )
-    ];
-
-    const view = new MergeView({
-      parent: mountEl,
-      a: { doc: original, extensions: commonExtensions },
-      b: { doc: modified, extensions: commonExtensions },
-      orientation: 'a-b',
-      highlightChanges: true,
-      gutter: true
-    });
-    mergeViewRef.current = view;
-
-    return () => {
-      view.destroy();
-      if (mergeViewRef.current === view) {
-        mergeViewRef.current = null;
-      }
-      mountEl.innerHTML = '';
-    };
-  }, [modified, open, original, resolvedTheme]);
+    return chunks.map((chunk, index) => ({
+      id: `${index}-${chunk.fromA}-${chunk.toA}-${chunk.fromB}-${chunk.toB}`,
+      currentLines: getLineRangeLabel(currentDoc, chunk.fromA, chunk.toA),
+      modifiedLines: getLineRangeLabel(modifiedDoc, chunk.fromB, chunk.toB),
+      currentText: getChunkText(currentDoc, chunk.fromA, chunk.toA),
+      modifiedText: getChunkText(modifiedDoc, chunk.fromB, chunk.toB)
+    }));
+  }, [modified, original]);
 
   return (
     <Modal
@@ -92,11 +88,33 @@ export function DiffModal({
       }
     >
       <div className={styles.content}>
-        <div className={styles.columnLabels}>
-          <span>{t('config_management.diff.current')}</span>
-          <span>{t('config_management.diff.modified')}</span>
-        </div>
-        <div className={styles.mergeRoot} ref={mergeContainerRef} />
+        {diffCards.length === 0 ? (
+          <div className={styles.emptyState}>{t('config_management.diff.no_changes')}</div>
+        ) : (
+          <div className={styles.diffList}>
+            {diffCards.map((card, index) => (
+              <article key={card.id} className={styles.diffCard}>
+                <div className={styles.diffCardHeader}>#{index + 1}</div>
+                <div className={styles.diffColumns}>
+                  <section className={styles.diffColumn}>
+                    <header className={styles.diffColumnHeader}>
+                      <span>{t('config_management.diff.current')}</span>
+                      <span className={styles.lineRange}>L{card.currentLines}</span>
+                    </header>
+                    <pre className={styles.codeBlock}>{card.currentText || '-'}</pre>
+                  </section>
+                  <section className={styles.diffColumn}>
+                    <header className={styles.diffColumnHeader}>
+                      <span>{t('config_management.diff.modified')}</span>
+                      <span className={styles.lineRange}>L{card.modifiedLines}</span>
+                    </header>
+                    <pre className={styles.codeBlock}>{card.modifiedText || '-'}</pre>
+                  </section>
+                </div>
+              </article>
+            ))}
+          </div>
+        )}
       </div>
     </Modal>
   );

src/pages/AuthFilesPage.tsx

@@ -57,8 +57,10 @@ export function AuthFilesPage() {
   const [detailModalOpen, setDetailModalOpen] = useState(false);
   const [selectedFile, setSelectedFile] = useState<AuthFileItem | null>(null);
   const [viewMode, setViewMode] = useState<'diagram' | 'list'>('list');
+  const [batchActionBarVisible, setBatchActionBarVisible] = useState(false);
   const floatingBatchActionsRef = useRef<HTMLDivElement>(null);
   const previousSelectionCountRef = useRef(0);
+  const selectionCountRef = useRef(0);
 
   const { keyStats, usageDetails, loadKeyStats } = useAuthFilesStats();
   const {
@@ -331,24 +333,46 @@ export function AuthFilesPage() {
       window.removeEventListener('resize', updatePadding);
       document.documentElement.style.removeProperty('--auth-files-action-bar-height');
     };
+  }, [batchActionBarVisible, selectionCount]);
+
+  useEffect(() => {
+    selectionCountRef.current = selectionCount;
+    if (selectionCount > 0) {
+      setBatchActionBarVisible(true);
+    }
   }, [selectionCount]);
 
   useLayoutEffect(() => {
+    if (!batchActionBarVisible) return;
     const currentCount = selectionCount;
     const previousCount = previousSelectionCountRef.current;
     const actionsEl = floatingBatchActionsRef.current;
+    if (!actionsEl) return;
 
-    if (currentCount > 0 && previousCount === 0 && actionsEl) {
-      gsap.killTweensOf(actionsEl);
+    gsap.killTweensOf(actionsEl);
+
+    if (currentCount > 0 && previousCount === 0) {
       gsap.fromTo(
         actionsEl,
         { y: 56, autoAlpha: 0 },
         { y: 0, autoAlpha: 1, duration: 0.28, ease: 'power3.out' }
       );
+    } else if (currentCount === 0 && previousCount > 0) {
+      gsap.to(actionsEl, {
+        y: 56,
+        autoAlpha: 0,
+        duration: 0.22,
+        ease: 'power2.in',
+        onComplete: () => {
+          if (selectionCountRef.current === 0) {
+            setBatchActionBarVisible(false);
+          }
+        }
+      });
     }
 
     previousSelectionCountRef.current = currentCount;
-  }, [selectionCount]);
+  }, [batchActionBarVisible, selectionCount]);
 
   const renderFilterTags = () => (
     <div className={styles.filterTags}>
@@ -584,7 +608,7 @@ export function AuthFilesPage() {
         onChange={handlePrefixProxyChange}
       />
 
-      {selectionCount > 0 && typeof document !== 'undefined'
+      {batchActionBarVisible && typeof document !== 'undefined'
         ? createPortal(
             <div className={styles.batchActionContainer} ref={floatingBatchActionsRef}>
               <div className={styles.batchActionBar}>