feat: 사이드바 파일유형 필터링 수정, 아이콘 개선, 로고 변경

- 파일유형 클릭 시 activeCat 덮어쓰던 버그 수정
- 파일유형에 전체 항목 추가 (기본 선택)
- Icon 컴포넌트에 file/user/log-out/edit 추가, 미등록 아이콘 폴백 처리
- DH.png 로고로 사이드바 브랜드 마크 교체 (index/admin 공통)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

index.html

@@ -42,7 +42,8 @@
   /* SIDEBAR */
   .sb{display:flex;flex-direction:column;gap:0;padding:14px 10px;border-right:1px solid var(--border);background:var(--bg);overflow-y:auto;min-height:0}
   .sb-brand{display:flex;align-items:center;gap:10px;padding:6px 8px 14px;color:var(--ink)}
-  .sb-brand-mark{width:26px;height:26px;border-radius:7px;background:var(--ink);display:grid;place-items:center;color:#fff;font-weight:700;font-size:12px;letter-spacing:-.02em;flex-shrink:0}
+  .sb-brand-mark{width:32px;height:32px;border-radius:7px;background:#fff;display:grid;place-items:center;flex-shrink:0;overflow:hidden}
+  .sb-brand-mark img{width:100%;height:100%;object-fit:contain}
   .sb-brand-name{font-weight:600;font-size:15px;letter-spacing:-.01em}
   .sb-brand-sub{font-size:11px;color:var(--muted);font-family:var(--font-mono);margin-top:1px}
   .sb-search{display:flex;align-items:center;gap:8px;padding:7px 10px;background:var(--surface-2);border-radius:7px;margin:2px 4px 12px;color:var(--muted)}
@@ -598,10 +599,15 @@ const Icon = ({ name, size = 16, stroke = 1.75, ...rest }) => {
     cloud: <><path d="M17 18a4 4 0 0 0 .8-7.9 6 6 0 0 0-11.6 1A4.5 4.5 0 0 0 7 19h10Z"/></>,
     image: <><rect x="3" y="3" width="18" height="18" rx="2"/><circle cx="9" cy="9" r="2"/><path d="m21 15-5-5-9 9"/></>,
     video: <><rect x="3" y="6" width="13" height="12" rx="2"/><path d="m22 8-6 4 6 4V8Z"/></>,
+    file: <><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><path d="M14 2v6h6"/></>,
+    user: <><path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/></>,
+    "log-out": <><path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4M16 17l5-5-5-5M21 12H9"/></>,
+    edit: <><path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7"/><path d="M18.5 2.5a2.12 2.12 0 0 1 3 3L12 15l-4 1 1-4Z"/></>,
   };
+  const fallback = paths['folder'];
   return (
     <svg width={size} height={size} viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={stroke} strokeLinecap="round" strokeLinejoin="round" {...rest}>
-      {paths[name] || null}
+      {paths[name] || fallback}
     </svg>
   );
 };
@@ -691,7 +697,7 @@ const Sidebar = ({ activeFolder, setActiveFolder, activeCat, setActiveCat, categ
   return (
     <aside className={`sb scrollbar${open ? ' open' : ''}`}>
       <div className="sb-brand">
-        <div className="sb-brand-mark" style={{ background: accent }}>자</div>
+        <div className="sb-brand-mark"><img src="/DH.png" alt="로고" /></div>
         <div>
           <div className="sb-brand-name">자료실</div>
           <div className="sb-brand-sub">v2.4 · 워크스페이스</div>
@@ -720,10 +726,17 @@ const Sidebar = ({ activeFolder, setActiveFolder, activeCat, setActiveCat, categ
         <span>파일 유형</span>
       </div>
       <div style={{ display:"flex", flexDirection:"column", gap:1 }}>
+        <div
+          className={`sb-item ${activeCat === null ? "active" : ""}`}
+          onClick={() => { setActiveCat(null); onClose?.(); }}>
+          <Icon name="folder-open" size={15} className="ico" />
+          <span className="lbl">전체</span>
+          <span className="cnt">{folders.all ?? 0}</span>
+        </div>
         {categories.map(c => (
           <div key={c.id}
             className={`sb-item ${activeCat === c.id ? "active" : ""}`}
-            onClick={() => { setActiveCat(c.id); setActiveFolder("all"); onClose?.(); }}>
+            onClick={() => { setActiveCat(c.id); onClose?.(); }}>
             <Icon name={c.icon} size={15} className="ico" />
             <span className="lbl">{c.label}</span>
             <span className="cnt">{catStats[c.id] ?? 0}</span>