feat(safety): 안전 자료실 UI Phase 3 — /safety 3탭(재해·법령지침·서적표준)

safety-library-1 Phase 3 슬라이스. /safety=재해 redirect, 탭=incident /
law·guide 세그먼트(법령 기본 KR) / standard·book·manual·paper 프리셋.
공용 SafetyDocList(GET /documents/ material_type C-1 계약 재사용, 백엔드
무변경=freeze 정합) + Sidebar 네비 1건. 케이스 그룹핑·version_status
뱃지=API 확장 필요라 후속.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/lib/components/Sidebar.svelte

@@ -2,7 +2,7 @@
   import { page } from '$app/stores';
   import { goto } from '$app/navigation';
   import { api } from '$lib/api';
-  import { ChevronRight, ChevronDown, FolderOpen, FolderTree, Inbox, Clock, Mail, Scale, StickyNote, GraduationCap, CalendarCheck, MessageCircle, Hash } from 'lucide-svelte';
+  import { ChevronRight, ChevronDown, FolderOpen, FolderTree, Inbox, Clock, Mail, Scale, StickyNote, GraduationCap, CalendarCheck, MessageCircle, Hash, HardHat } from 'lucide-svelte';
 
   let tree = $state([]);
   let loading = $state(true);
@@ -195,6 +195,13 @@
     >
       <FolderTree size={14} /> 자료실
     </a>
+    <a
+      href="/safety"
+      class="w-full flex items-center gap-2 px-3 py-1.5 rounded-md text-sm transition-colors
+        {$page.url.pathname.startsWith('/safety') ? 'bg-accent/15 text-accent' : 'text-dim hover:bg-surface hover:text-text'}"
+    >
+      <HardHat size={14} /> 안전 자료실
+    </a>
     <a
       href="/clause"
       class="w-full flex items-center gap-2 px-3 py-1.5 rounded-md text-sm transition-colors

frontend/src/routes/safety/+layout.svelte

@@ -0,0 +1,34 @@
+<script>
+  // 안전 자료실 (safety-library-1 Phase 3) — 재해/법령·지침/서적·표준·매뉴얼 3탭.
+  import { page } from '$app/stores';
+
+  const TABS = [
+    { href: '/safety/incidents', label: '재해사례' },
+    { href: '/safety/laws', label: '법령·지침' },
+    { href: '/safety/materials', label: '서적·표준·매뉴얼' },
+  ];
+</script>
+
+<div class="max-w-5xl mx-auto px-4 py-5 flex flex-col gap-4">
+  <header>
+    <h1 class="text-lg font-bold text-text">안전 자료실</h1>
+    <p class="text-xs text-dim mt-0.5">재해사례·법령·지침·표준 — 자료유형(material_type) 축 기반</p>
+  </header>
+
+  <nav class="flex gap-1 border-b border-default" aria-label="안전 자료실 탭">
+    {#each TABS as tab}
+      <a
+        href={tab.href}
+        aria-current={$page.url.pathname === tab.href ? 'page' : undefined}
+        class="px-3 py-2 text-sm font-medium border-b-2 -mb-px transition-colors
+          {$page.url.pathname === tab.href
+            ? 'border-accent text-accent'
+            : 'border-transparent text-dim hover:text-text'}"
+      >
+        {tab.label}
+      </a>
+    {/each}
+  </nav>
+
+  <slot />
+</div>

frontend/src/routes/safety/+page.svelte

@@ -0,0 +1,9 @@
+<script>
+  // /safety 진입 = 재해 탭 redirect (plan: +page=재해 탭 redirect)
+  import { onMount } from 'svelte';
+  import { goto } from '$app/navigation';
+
+  onMount(() => {
+    goto('/safety/incidents', { replaceState: true });
+  });
+</script>

frontend/src/routes/safety/SafetyDocList.svelte

@@ -0,0 +1,75 @@
+<script>
+  // 안전 자료실 공용 목록 — material_type + jurisdiction 필터로 GET /documents/ 조회.
+  // C-1 계약: material_type 지정 = 기본 exclude(news·law_monitor·note) 해제 (documents.py list_documents).
+  import { api } from '$lib/api';
+  import { addToast } from '$lib/stores/toast';
+  import DocumentCard from '$lib/components/DocumentCard.svelte';
+
+  let { materialType, jurisdiction = '' } = $props();
+
+  const PAGE_SIZE = 20;
+  let docs = $state([]);
+  let total = $state(0);
+  let nextPage = $state(1);
+  let loading = $state(false);
+
+  async function load(reset = false) {
+    loading = true;
+    const pageToLoad = reset ? 1 : nextPage;
+    try {
+      const params = new URLSearchParams();
+      params.set('material_type', materialType);
+      if (jurisdiction) params.set('jurisdiction', jurisdiction);
+      params.set('page', String(pageToLoad));
+      params.set('page_size', String(PAGE_SIZE));
+      const result = await api(`/documents/?${params}`);
+      docs = reset ? result.items : [...docs, ...result.items];
+      total = result.total;
+      nextPage = pageToLoad + 1;
+    } catch {
+      addToast('error', '안전 자료 로딩 실패');
+    } finally {
+      loading = false;
+    }
+  }
+
+  $effect(() => {
+    // 필터 변경 시 1페이지부터 재조회 (materialType/jurisdiction 읽기 = 반응 트리거)
+    void materialType;
+    void jurisdiction;
+    docs = [];
+    load(true);
+  });
+
+  let hasMore = $derived(docs.length < total);
+</script>
+
+<div class="flex flex-col gap-2">
+  {#if !loading || docs.length > 0}
+    <p class="text-xs text-dim tabular-nums">총 {total.toLocaleString()}건</p>
+  {/if}
+
+  {#if docs.length > 0}
+    <div class="flex flex-col gap-2">
+      {#each docs as doc (doc.id)}
+        <DocumentCard {doc} />
+      {/each}
+    </div>
+  {:else if !loading}
+    <div class="py-12 text-center text-sm text-dim">
+      해당 조건의 자료가 없습니다.
+    </div>
+  {/if}
+
+  {#if loading}
+    <div class="py-6 text-center text-sm text-dim">불러오는 중…</div>
+  {:else if hasMore}
+    <button
+      type="button"
+      onclick={() => load(false)}
+      class="self-center px-4 py-1.5 rounded-md text-sm text-dim border border-default hover:bg-surface hover:text-text transition-colors"
+    >
+      더 보기 ({docs.length}/{total.toLocaleString()})
+    </button>
+  {/if}
+</div>

frontend/src/routes/safety/incidents/+page.svelte

@@ -0,0 +1,29 @@
+<script>
+  // 재해사례 탭 — material_type=incident (KOSHA 사고사망·재해사례·CSB 등).
+  // 케이스 그룹핑(boardno 본문+첨부 1카드)은 API 확장 필요라 후속(DS freeze 하 백엔드 무변경).
+  import SafetyDocList from '../SafetyDocList.svelte';
+
+  const JURISDICTIONS = [
+    { value: '', label: '전체' },
+    { value: 'KR', label: 'KR' },
+    { value: 'US', label: 'US' },
+  ];
+  let jurisdiction = $state('');
+</script>
+
+<div class="flex flex-col gap-3">
+  <div class="flex items-center gap-1.5" role="group" aria-label="관할 필터">
+    {#each JURISDICTIONS as j}
+      <button
+        type="button"
+        onclick={() => (jurisdiction = j.value)}
+        class="px-2.5 py-1 rounded-full text-xs font-medium transition-colors
+          {jurisdiction === j.value ? 'bg-accent/15 text-accent' : 'text-dim hover:bg-surface hover:text-text'}"
+      >
+        {j.label}
+      </button>
+    {/each}
+  </div>
+
+  <SafetyDocList materialType="incident" {jurisdiction} />
+</div>

frontend/src/routes/safety/laws/+page.svelte

@@ -0,0 +1,48 @@
+<script>
+  // 법령·지침 탭 — 법령(law, 버전체인 current 만 코퍼스 노출) / 지침(guide, KOSHA GUIDE 등).
+  // 법령 기본 관할 = KR (plan: country 누락 = KR 정규화). version_status 뱃지는 API 확장 후속.
+  import SafetyDocList from '../SafetyDocList.svelte';
+
+  const KINDS = [
+    { value: 'law', label: '법령' },
+    { value: 'guide', label: '지침' },
+  ];
+  const JURISDICTIONS = [
+    { value: 'KR', label: 'KR' },
+    { value: 'US', label: 'US' },
+    { value: '', label: '전체' },
+  ];
+  let kind = $state('law');
+  let jurisdiction = $state('KR');
+</script>
+
+<div class="flex flex-col gap-3">
+  <div class="flex items-center justify-between flex-wrap gap-2">
+    <div class="flex items-center gap-1" role="group" aria-label="자료유형">
+      {#each KINDS as k}
+        <button
+          type="button"
+          onclick={() => (kind = k.value)}
+          class="px-3 py-1 rounded-md text-sm font-medium transition-colors
+            {kind === k.value ? 'bg-accent/15 text-accent' : 'text-dim hover:bg-surface hover:text-text'}"
+        >
+          {k.label}
+        </button>
+      {/each}
+    </div>
+    <div class="flex items-center gap-1.5" role="group" aria-label="관할 필터">
+      {#each JURISDICTIONS as j}
+        <button
+          type="button"
+          onclick={() => (jurisdiction = j.value)}
+          class="px-2.5 py-1 rounded-full text-xs font-medium transition-colors
+            {jurisdiction === j.value ? 'bg-accent/15 text-accent' : 'text-dim hover:bg-surface hover:text-text'}"
+        >
+          {j.label}
+        </button>
+      {/each}
+    </div>
+  </div>
+
+  <SafetyDocList materialType={kind} {jurisdiction} />
+</div>

frontend/src/routes/safety/materials/+page.svelte

@@ -0,0 +1,29 @@
+<script>
+  // 서적·표준·매뉴얼 탭 — 필터 프리셋(전용 뷰는 50건+ 게이트 뒤, plan Phase 3).
+  import SafetyDocList from '../SafetyDocList.svelte';
+
+  const KINDS = [
+    { value: 'standard', label: '표준 (NB 등)' },
+    { value: 'book', label: '서적' },
+    { value: 'manual', label: '매뉴얼' },
+    { value: 'paper', label: '논문' },
+  ];
+  let kind = $state('standard');
+</script>
+
+<div class="flex flex-col gap-3">
+  <div class="flex items-center gap-1" role="group" aria-label="자료유형">
+    {#each KINDS as k}
+      <button
+        type="button"
+        onclick={() => (kind = k.value)}
+        class="px-3 py-1 rounded-md text-sm font-medium transition-colors
+          {kind === k.value ? 'bg-accent/15 text-accent' : 'text-dim hover:bg-surface hover:text-text'}"
+      >
+        {k.label}
+      </button>
+    {/each}
+  </div>
+
+  <SafetyDocList materialType={kind} />
+</div>