diff --git a/src/pages/launcher/LauncherSourcePage.tsx b/src/pages/launcher/LauncherSourcePage.tsx
index 08d077a..04dc8a6 100644
--- a/src/pages/launcher/LauncherSourcePage.tsx
+++ b/src/pages/launcher/LauncherSourcePage.tsx
@@ -1,5 +1,5 @@
 import { Copy, FileText, Link2, RotateCcw } from 'lucide-react';
-import { useEffect, useMemo, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import { Badge, Button, Card, CardHeader, Modal } from '../../components/ui';
 import { useToast } from '../../components/toast';
 import { PageTitle } from '../../layout/AppLayout';
@@ -58,6 +58,13 @@ type DiffFile = {
   removed: number;
 };
 
+type DiffTreeNode = {
+  name: string;
+  path: string;
+  children: DiffTreeNode[];
+  file?: DiffFile;
+};
+
 function repoFullName(repo: GiteaRepo) {
   return (repo as GiteaRepo & { fullName?: string }).fullName ?? repo.full_name ?? normalizeRepository(repo.name);
 }
@@ -222,8 +229,96 @@ function diffLineClass(line: string) {
   return 'text-slate-300';
 }
 
+function buildDiffTree(files: DiffFile[]) {
+  const root: DiffTreeNode = { name: '', path: '', children: [] };
+
+  files.forEach((file) => {
+    const parts = file.path.split('/').filter(Boolean);
+    if (parts.length === 0) parts.push(file.path);
+
+    let current = root;
+    parts.forEach((part, index) => {
+      const path = parts.slice(0, index + 1).join('/');
+      let next = current.children.find((child) => child.name === part);
+      if (!next) {
+        next = { name: part, path, children: [] };
+        current.children.push(next);
+      }
+      if (index === parts.length - 1) next.file = file;
+      current = next;
+    });
+  });
+
+  const sortNodes = (nodes: DiffTreeNode[]) => {
+    nodes.sort((a, b) => {
+      if (Boolean(a.file) !== Boolean(b.file)) return a.file ? 1 : -1;
+      return a.name.localeCompare(b.name);
+    });
+    nodes.forEach((node) => sortNodes(node.children));
+  };
+
+  sortNodes(root.children);
+  return root.children;
+}
+
+function DiffTree({
+  nodes,
+  depth = 0,
+  onSelect
+}: {
+  nodes: DiffTreeNode[];
+  depth?: number;
+  onSelect: (file: DiffFile) => void;
+}) {
+  return (
+    <div className={depth === 0 ? 'space-y-0.5' : 'space-y-0.5'}>
+      {nodes.map((node) => (
+        <div key={node.path || node.name}>
+          {node.file ? (
+            <button
+              type="button"
+              className="flex w-full items-start justify-between gap-2 rounded py-1.5 pr-2 text-left text-slate-300 transition-colors hover:bg-slate-800/80 hover:text-slate-50"
+              style={{ paddingLeft: `${8 + depth * 14}px` }}
+              onClick={() => onSelect(node.file as DiffFile)}
+              title={node.file.path}
+            >
+              <span className="min-w-0 flex-1 truncate font-mono text-[12px]">{node.name}</span>
+              <span className="flex shrink-0 items-center gap-1 font-mono text-[11px]">
+                <span className="text-emerald-300">+{node.file.added}</span>
+                <span className="text-rose-300">-{node.file.removed}</span>
+              </span>
+            </button>
+          ) : (
+            <div
+              className="truncate py-1 pr-2 font-mono text-[12px] font-semibold text-slate-400"
+              style={{ paddingLeft: `${8 + depth * 14}px` }}
+              title={node.path}
+            >
+              {node.name}
+            </div>
+          )}
+          {node.children.length ? <DiffTree nodes={node.children} depth={depth + 1} onSelect={onSelect} /> : null}
+        </div>
+      ))}
+    </div>
+  );
+}
+
 function DiffViewer({ diff }: { diff: string }) {
   const files = parseDiffFiles(diff);
+  const tree = useMemo(() => buildDiffTree(files), [files]);
+  const scrollerRef = useRef<HTMLDivElement | null>(null);
+  const sectionRefs = useRef<Record<string, HTMLElement | null>>({});
+
+  const scrollToFile = (file: DiffFile) => {
+    const scroller = scrollerRef.current;
+    const section = sectionRefs.current[file.id];
+    if (!scroller || !section) return;
+    scroller.scrollTo({
+      top: section.offsetTop - scroller.offsetTop - 12,
+      behavior: 'smooth'
+    });
+  };
 
   return (
     <div className="grid max-h-[56vh] overflow-hidden rounded-md border border-border bg-[#080b10] text-xs leading-5 lg:grid-cols-[280px_minmax(0,1fr)]">
@@ -233,27 +328,20 @@ function DiffViewer({ diff }: { diff: string }) {
           <p className="mt-0.5 text-[11px] text-slate-400">총 {files.length}개</p>
         </div>
         <div className="max-h-44 overflow-y-auto p-2 lg:max-h-[calc(56vh-50px)]">
-          {files.map((file) => (
-            <button
-              key={`tree-${file.id}`}
-              type="button"
-              className="flex w-full items-start justify-between gap-2 rounded px-2 py-1.5 text-left text-slate-300 transition-colors hover:bg-slate-800/80 hover:text-slate-50"
-              onClick={() => document.getElementById(`diff-file-${file.id}`)?.scrollIntoView({ behavior: 'smooth', block: 'start' })}
-              title={file.path}
-            >
-              <span className="min-w-0 flex-1 truncate font-mono text-[12px]">{file.path}</span>
-              <span className="flex shrink-0 items-center gap-1 font-mono text-[11px]">
-                <span className="text-emerald-300">+{file.added}</span>
-                <span className="text-rose-300">-{file.removed}</span>
-              </span>
-            </button>
-          ))}
+          <DiffTree nodes={tree} onSelect={scrollToFile} />
         </div>
       </aside>
-      <div className="min-w-0 overflow-auto p-3 font-mono">
+      <div ref={scrollerRef} className="min-w-0 overflow-auto p-3 font-mono">
         <div className="space-y-4">
         {files.map((file) => (
-          <section id={`diff-file-${file.id}`} key={file.id} className="min-w-max scroll-mt-3 overflow-hidden rounded-md border border-slate-700/80 bg-[#0b0f14]">
+          <section
+            id={`diff-file-${file.id}`}
+            key={file.id}
+            ref={(element) => {
+              sectionRefs.current[file.id] = element;
+            }}
+            className="min-w-max scroll-mt-3 overflow-hidden rounded-md border border-slate-700/80 bg-[#0b0f14]"
+          >
             <div className="sticky top-0 z-10 flex items-center justify-between gap-4 border-b border-slate-700/80 bg-[#111827] px-4 py-2">
               <div className="min-w-0">
                 <p className="truncate text-[13px] font-semibold text-slate-100">{file.path}</p>