diff --git a/apps/web/src/pages/dashboard/DashboardPage.tsx b/apps/web/src/pages/dashboard/DashboardPage.tsx
index 4a011c0..850406f 100644
--- a/apps/web/src/pages/dashboard/DashboardPage.tsx
+++ b/apps/web/src/pages/dashboard/DashboardPage.tsx
@@ -228,8 +228,6 @@ export function DashboardPage() {
 
   const enabledTypes = useMemo(() => VESSEL_TYPE_ORDER.filter((c) => typeEnabled[c]), [typeEnabled]);
   const speedPanelType = (selectedLegacyVessel?.shipCode ?? (enabledTypes.length === 1 ? enabledTypes[0] : "PT")) as VesselTypeCode;
-  const alarmFilterSummary = allAlarmKindsEnabled ? "전체" : `${enabledAlarmKinds.length}/${LEGACY_ALARM_KINDS.length}`;
-
   const handleFleetContextMenu = (ownerKey: string, mmsis: number[]) => {
     if (!mmsis.length) return;
     const members = mmsis
@@ -279,8 +277,6 @@ export function DashboardPage() {
         filteredAlarms={filteredAlarms}
         alarms={alarms}
         alarmKindCounts={alarmKindCounts}
-        allAlarmKindsEnabled={allAlarmKindsEnabled}
-        alarmFilterSummary={alarmFilterSummary}
         speedPanelType={speedPanelType}
         onFleetContextMenu={handleFleetContextMenu}
         snapshot={snapshot}
diff --git a/apps/web/src/pages/dashboard/DashboardSidebar.tsx b/apps/web/src/pages/dashboard/DashboardSidebar.tsx
index b4483f0..0f1f645 100644
--- a/apps/web/src/pages/dashboard/DashboardSidebar.tsx
+++ b/apps/web/src/pages/dashboard/DashboardSidebar.tsx
@@ -1,4 +1,4 @@
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import { ToggleButton, Section } from '@wing/ui';
 import type { AisTarget } from '../../entities/aisTarget/model/types';
 import type { LegacyVesselIndex } from '../../entities/legacyVessel/lib';
@@ -41,8 +41,6 @@ interface DashboardSidebarProps {
   filteredAlarms: LegacyAlarm[];
   alarms: LegacyAlarm[];
   alarmKindCounts: Record<LegacyAlarmKind, number>;
-  allAlarmKindsEnabled: boolean;
-  alarmFilterSummary: string;
   speedPanelType: VesselTypeCode;
   onFleetContextMenu: (ownerKey: string, mmsis: number[]) => void;
   snapshot: AisPollingSnapshot;
@@ -67,8 +65,6 @@ export function DashboardSidebar({
   filteredAlarms,
   alarms,
   alarmKindCounts,
-  allAlarmKindsEnabled,
-  alarmFilterSummary,
   speedPanelType,
   onFleetContextMenu,
   snapshot,
@@ -97,6 +93,8 @@ export function DashboardSidebar({
     setUniqueSorted, setSortedIfChanged, toggleHighlightedMmsi,
   } = state;
 
+  const [isAlarmFilterOpen, setIsAlarmFilterOpen] = useState(false);
+
   useEffect(() => {
     if (!isOpen) return;
     const handler = (e: KeyboardEvent) => { if (e.key === 'Escape') onClose(); };
@@ -115,12 +113,12 @@ export function DashboardSidebar({
           fixed inset-y-0 left-0 z-[1200] w-[310px] max-w-[100vw] transform overflow-y-auto
           border-r border-wing-border bg-wing-surface transition-transform duration-200
           ${isOpen ? 'translate-x-0' : '-translate-x-full'}
-          md:static md:z-auto md:translate-x-0 md:transition-none
+          md:static md:z-auto md:translate-x-0 md:transition-none md:overflow-hidden md:flex md:flex-col
         `}
       >
         <div className="h-[44px] md:hidden" />
 
-        <Section title="업종 필터">
+        <Section title="업종 필터" className="md:shrink-0">
           <div className="flex flex-wrap gap-0.75 mb-1.5">
             <ToggleButton
               on={showTargets}
@@ -158,6 +156,7 @@ export function DashboardSidebar({
 
         <Section
           title="지도 표시 설정"
+          className="md:shrink-0"
           actions={
             <ToggleButton
               on={projection === 'globe'}
@@ -172,7 +171,7 @@ export function DashboardSidebar({
           <MapToggles value={overlays} onToggle={(k) => setOverlays((prev) => ({ ...prev, [k]: !prev[k] }))} />
         </Section>
 
-        <Section title="속도 프로파일" defaultOpen={false}>
+        <Section title="속도 프로파일" defaultOpen={false} className="md:shrink-0">
           <SpeedProfilePanel selectedType={speedPanelType} />
         </Section>
 
@@ -197,7 +196,8 @@ export function DashboardSidebar({
               </label>
             </div>
           }
-          className="max-h-[260px] flex flex-col overflow-hidden [&>div:last-child]:overflow-y-auto [&>div:last-child]:min-h-0"
+          className="md:shrink-0 max-h-[260px] flex flex-col overflow-hidden"
+          contentClassName="flex-1 min-h-0 overflow-y-auto"
         >
           <RelationsPanel
             selectedVessel={selectedLegacyVessel}
@@ -231,7 +231,8 @@ export function DashboardSidebar({
               <span className="text-[8px] font-normal normal-case tracking-normal text-wing-accent">({legacyVesselsFiltered.length}척)</span>
             </>
           }
-          className="flex-1 min-h-0 flex flex-col [&>div:last-child]:overflow-y-auto [&>div:last-child]:min-h-0 [&>div:last-child]:flex-1"
+          className="md:flex-1 md:min-h-0 flex flex-col overflow-hidden"
+          contentClassName="md:flex-1 md:min-h-0 flex flex-col overflow-hidden"
         >
           <VesselList
             vessels={legacyVesselsFiltered}
@@ -252,54 +253,31 @@ export function DashboardSidebar({
             </>
           }
           actions={
-            LEGACY_ALARM_KINDS.length <= 3 ? (
-              <div className="flex gap-1.5 items-center">
-                {LEGACY_ALARM_KINDS.map((k) => (
-                  <label key={k} className="inline-flex gap-1 items-center cursor-pointer select-none">
-                    <input type="checkbox" checked={!!alarmKindEnabled[k]} onChange={() => setAlarmKindEnabled((prev) => ({ ...prev, [k]: !prev[k] }))} />
-                    <span className="text-[8px] text-wing-muted whitespace-nowrap">{LEGACY_ALARM_KIND_LABEL[k]}</span>
-                  </label>
-                ))}
-              </div>
-            ) : (
-              <details className="alarm-filter">
-                <summary className="alarm-filter__summary" title="경고 종류 필터">{alarmFilterSummary}</summary>
-                <div className="alarm-filter__menu" role="menu" aria-label="alarm kind filter">
-                  <label className="alarm-filter__row">
-                    <input
-                      type="checkbox"
-                      checked={allAlarmKindsEnabled}
-                      onChange={() =>
-                        setAlarmKindEnabled((prev) => {
-                          const allOn = LEGACY_ALARM_KINDS.every((k) => prev[k]);
-                          const nextVal = !allOn;
-                          return Object.fromEntries(LEGACY_ALARM_KINDS.map((k) => [k, nextVal])) as Record<LegacyAlarmKind, boolean>;
-                        })
-                      }
-                    />
-                    전체
-                    <span className="alarm-filter__cnt">{alarms.length}</span>
-                  </label>
-                  <div className="alarm-filter__sep" />
-                  {LEGACY_ALARM_KINDS.map((k) => (
-                    <label key={k} className="alarm-filter__row">
-                      <input type="checkbox" checked={!!alarmKindEnabled[k]} onChange={() => setAlarmKindEnabled((prev) => ({ ...prev, [k]: !prev[k] }))} />
-                      {LEGACY_ALARM_KIND_LABEL[k]}
-                      <span className="alarm-filter__cnt">{alarmKindCounts[k] ?? 0}</span>
-                    </label>
-                  ))}
-                </div>
-              </details>
-            )
+            <ToggleButton on={isAlarmFilterOpen} onClick={() => setIsAlarmFilterOpen((v) => !v)}>
+              필터
+            </ToggleButton>
           }
-          className="max-h-[130px] flex flex-col overflow-visible [&>div:last-child]:overflow-y-auto [&>div:last-child]:min-h-0 [&>div:last-child]:flex-1"
+          className="md:shrink-0 max-h-[180px] flex flex-col overflow-hidden"
+          contentClassName="flex-1 min-h-0 overflow-y-auto"
         >
+          {isAlarmFilterOpen && (
+            <div className="flex flex-wrap gap-x-2.5 gap-y-1 mb-1.5">
+              {LEGACY_ALARM_KINDS.map((k) => (
+                <label key={k} className="inline-flex gap-1 items-center cursor-pointer select-none">
+                  <input type="checkbox" checked={!!alarmKindEnabled[k]} onChange={() => setAlarmKindEnabled((prev) => ({ ...prev, [k]: !prev[k] }))} />
+                  <span className="text-[8px] text-wing-muted whitespace-nowrap">
+                    {LEGACY_ALARM_KIND_LABEL[k]} <span className="text-wing-text">{alarmKindCounts[k] ?? 0}</span>
+                  </span>
+                </label>
+              ))}
+            </div>
+          )}
           <AlarmsPanel alarms={filteredAlarms} onSelectMmsi={setSelectedMmsi} />
         </Section>
 
         {adminMode ? (
           <>
-            <Section title="ADMIN · AIS Target Polling" defaultOpen={false}>
+            <Section title="ADMIN · AIS Target Polling" defaultOpen={false} className="md:shrink-0">
               <div style={{ fontSize: 11, lineHeight: 1.45 }}>
                 <div style={{ color: 'var(--muted)', fontSize: 10 }}>엔드포인트</div>
                 <div style={{ wordBreak: 'break-all' }}>{AIS_API_BASE}/api/ais-target/search</div>
@@ -322,7 +300,7 @@ export function DashboardSidebar({
               </div>
             </Section>
 
-            <Section title="ADMIN · Legacy (CN Permit)" defaultOpen={false}>
+            <Section title="ADMIN · Legacy (CN Permit)" defaultOpen={false} className="md:shrink-0">
               {legacyError ? (
                 <div style={{ fontSize: 11, color: 'var(--wing-danger)' }}>legacy load error: {legacyError}</div>
               ) : (
@@ -340,7 +318,7 @@ export function DashboardSidebar({
               )}
             </Section>
 
-            <Section title="ADMIN · Viewport / BBox" defaultOpen={false}>
+            <Section title="ADMIN · Viewport / BBox" defaultOpen={false} className="md:shrink-0">
               <div style={{ fontSize: 11, lineHeight: 1.45 }}>
                 <div style={{ color: 'var(--muted)', fontSize: 10 }}>현재 View BBox</div>
                 <div style={{ wordBreak: 'break-all', fontSize: 10 }}>{fmtBbox(viewBbox)}</div>
@@ -399,7 +377,7 @@ export function DashboardSidebar({
               </div>
             </Section>
 
-            <Section title="ADMIN · Map (Extras)" defaultOpen={false}>
+            <Section title="ADMIN · Map (Extras)" defaultOpen={false} className="md:shrink-0">
               <Map3DSettingsToggles value={settings} onToggle={(k) => setSettings((prev) => ({ ...prev, [k]: !prev[k] }))} />
               <div style={{ fontSize: 10, color: 'var(--muted)', marginTop: 6 }}>단일 WebGL 컨텍스트: MapboxOverlay(interleaved)</div>
             </Section>
@@ -407,12 +385,13 @@ export function DashboardSidebar({
             <Section
               title="ADMIN · AIS Targets (All)"
               defaultOpen={false}
-              className="flex-1 min-h-0 flex flex-col [&>div:last-child]:overflow-y-auto [&>div:last-child]:min-h-0 [&>div:last-child]:flex-1"
+              className="md:shrink-0 md:max-h-[200px] flex flex-col md:overflow-hidden"
+              contentClassName="md:flex-1 md:min-h-0 md:overflow-y-auto"
             >
               <AisTargetList targets={targetsInScope} selectedMmsi={selectedMmsi} onSelectMmsi={setSelectedMmsi} legacyIndex={legacyIndex} />
             </Section>
 
-            <Section title="ADMIN · 수역 데이터" defaultOpen={false} className="max-h-[130px] overflow-y-auto">
+            <Section title="ADMIN · 수역 데이터" defaultOpen={false} className="md:shrink-0">
               {zonesError ? (
                 <div style={{ fontSize: 11, color: 'var(--wing-danger)' }}>zones load error: {zonesError}</div>
               ) : (
diff --git a/apps/web/src/widgets/vesselList/VesselList.tsx b/apps/web/src/widgets/vesselList/VesselList.tsx
index 112b7ba..bd1107b 100644
--- a/apps/web/src/widgets/vesselList/VesselList.tsx
+++ b/apps/web/src/widgets/vesselList/VesselList.tsx
@@ -1,3 +1,5 @@
+import { useMemo, useState } from "react";
+import { TextInput } from "@wing/ui";
 import { VESSEL_TYPES } from "../../entities/vessel/model/meta";
 import type { DerivedLegacyVessel } from "../../features/legacyDashboard/model/types";
 import type { MouseEvent } from "react";
@@ -12,6 +14,26 @@ type Props = {
   onClearHover?: () => void;
 };
 
+function isFiniteNumber(x: unknown): x is number {
+  return typeof x === "number" && Number.isFinite(x);
+}
+
+const STRIP_RE = /[\s\-.,_]/g;
+
+function normalize(s: string): string {
+  return s.replace(STRIP_RE, "").toLowerCase();
+}
+
+function matchesQuery(v: DerivedLegacyVessel, nq: string): boolean {
+  if (normalize(v.permitNo).includes(nq)) return true;
+  if (normalize(v.name).includes(nq)) return true;
+  if (v.legacy.shipNameRoman && normalize(v.legacy.shipNameRoman).includes(nq)) return true;
+  if (v.legacy.shipNameCn && normalize(v.legacy.shipNameCn).includes(nq)) return true;
+  if (v.legacy.callSign && normalize(v.legacy.callSign).includes(nq)) return true;
+  if (normalize(String(v.mmsi)).includes(nq)) return true;
+  return false;
+}
+
 export function VesselList({
   vessels,
   selectedMmsi,
@@ -21,6 +43,8 @@ export function VesselList({
   onHoverMmsi,
   onClearHover,
 }: Props) {
+  const [searchQuery, setSearchQuery] = useState("");
+
   const handlePrimaryAction = (e: MouseEvent, mmsi: number) => {
     if (e.shiftKey || e.ctrlKey || e.metaKey) {
       onToggleHighlightMmsi(mmsi);
@@ -29,17 +53,23 @@ export function VesselList({
     onSelectMmsi(mmsi);
   };
 
-  function isFiniteNumber(x: unknown): x is number {
-  return typeof x === "number" && Number.isFinite(x);
-}
-
-  const sorted = vessels
-    .slice()
-    .sort((a, b) => (isFiniteNumber(b.sog) ? b.sog : -1) - (isFiniteNumber(a.sog) ? a.sog : -1))
-    .slice(0, 80);
+  const sorted = useMemo(() => {
+    const nq = searchQuery.length >= 2 ? normalize(searchQuery) : "";
+    const filtered = nq ? vessels.filter((v) => matchesQuery(v, nq)) : vessels;
+    return filtered.slice().sort((a, b) => (isFiniteNumber(b.sog) ? b.sog : -1) - (isFiniteNumber(a.sog) ? a.sog : -1));
+  }, [vessels, searchQuery]);
 
   return (
-    <div className="vlist">
+    <div className="flex min-h-0 flex-1 flex-col">
+      <div className="mb-1.5 shrink-0 px-1">
+        <TextInput
+          placeholder="검색: 등록번호 / 선박명 / MMSI"
+          value={searchQuery}
+          onChange={(e) => setSearchQuery(e.target.value)}
+          className="h-5 w-full py-0 text-[9px]"
+        />
+      </div>
+      <div className="vlist">
       {sorted.map((v) => {
         const meta = VESSEL_TYPES[v.shipCode];
         const primarySegs = meta.speedProfile.filter((s) => s.primary);
@@ -76,6 +106,7 @@ export function VesselList({
         );
       })}
       {sorted.length === 0 ? <div style={{ fontSize: 11, color: "var(--muted)" }}>(표시할 대상 선박 없음)</div> : null}
+      </div>
     </div>
   );
 }
diff --git a/packages/ui/src/components/Section.tsx b/packages/ui/src/components/Section.tsx
index 542008c..349d483 100644
--- a/packages/ui/src/components/Section.tsx
+++ b/packages/ui/src/components/Section.tsx
@@ -1,3 +1,4 @@
+import { useState } from 'react';
 import type { HTMLAttributes, ReactNode } from 'react';
 import { cn } from '../utils/cn.ts';
 
@@ -5,25 +6,33 @@ interface SectionProps extends Omit<HTMLAttributes<HTMLElement>, 'title'> {
   title: ReactNode;
   actions?: ReactNode;
   defaultOpen?: boolean;
+  contentClassName?: string;
   children: ReactNode;
 }
 
-export function Section({ title, actions, defaultOpen = true, className, children, ...props }: SectionProps) {
+export function Section({ title, actions, defaultOpen = true, className, contentClassName, children, ...props }: SectionProps) {
+  const [isOpen, setIsOpen] = useState(defaultOpen);
+
   return (
-    <details open={defaultOpen || undefined} className={cn('border-b border-wing-border', className)} {...props}>
-      <summary className="flex cursor-pointer list-none items-center justify-between gap-2 px-3 py-2.5 select-none [&::-webkit-details-marker]:hidden">
+    <div className={cn('border-b border-wing-border', className)} {...props}>
+      <div
+        className="shrink-0 flex cursor-pointer items-center justify-between gap-2 px-3 py-2.5 select-none"
+        onClick={() => setIsOpen((v) => !v)}
+      >
         <span className="text-[9px] font-bold uppercase tracking-[1.5px] text-wing-muted">
           {title}
         </span>
         {actions && (
-          <span onClick={(e) => e.preventDefault()} className="flex items-center gap-1.5">
+          <span onClick={(e) => e.stopPropagation()} className="flex items-center gap-1.5">
             {actions}
           </span>
         )}
-      </summary>
-      <div className="px-3 pb-2.5">
-        {children}
       </div>
-    </details>
+      {isOpen && (
+        <div className={cn('px-3 pb-2.5', contentClassName)}>
+          {children}
+        </div>
+      )}
+    </div>
   );
 }