feat(library): Phase 2B 문서 상세 facet 편집 + 업로드 facet 전달

FileInfoView에 회사/주제/연도/문서유형 select 4개 추가.
facet 옵션은 /api/library/facets에서 로드, 세션 캐시.
업로드 엔드포인트에 facet Form 파라미터 4개 추가.
업로드 시 현재 선택 facet 자동 전달 + 미리보기 텍스트.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/api/documents.py

@@ -422,6 +422,10 @@ async def upload_document(
     session: Annotated[AsyncSession, Depends(get_session)],
     doc_purpose: str | None = Form(None, description="business | knowledge"),
     library_path: str | None = Form(None, description="자료실 경로 (자동 @library/ 태깅)"),
+    facet_company: str | None = Form(None),
+    facet_topic: str | None = Form(None),
+    facet_year: int | None = Form(None),
+    facet_doctype: str | None = Form(None),
 ):
     """파일 업로드 → Inbox 저장 + DB 등록 + 처리 큐 등록"""
     from core.library import DEFAULT_LIBRARY_PATH, LIBRARY_PREFIX, normalize_library_path
@@ -490,6 +494,10 @@ async def upload_document(
         source_channel="manual",
         doc_purpose=doc_purpose,
         user_tags=[library_tag] if library_tag else [],
+        facet_company=facet_company or None,
+        facet_topic=facet_topic or None,
+        facet_year=facet_year,
+        facet_doctype=facet_doctype or None,
     )
     session.add(doc)
     await session.flush()

frontend/src/lib/components/editors/FileInfoView.svelte

@@ -1,10 +1,14 @@
 <script>
-  // Phase E.1 — 파일 메타 정보 read-only 표시.
+  // 파일 메타 정보 + facet 편집
+  import { onMount } from 'svelte';
   import { api } from '$lib/api';
   import { addToast } from '$lib/stores/toast';
 
   let { doc } = $props();
 
+  // facet 옵션 (세션 내 1회 로드)
+  let facetOptions = $state({ company: [], topic: [], doctype: [], year: [] });
+
   function formatDate(dateStr) {
     if (!dateStr) return '-';
     return new Date(dateStr).toLocaleDateString('ko-KR', {
@@ -21,6 +25,12 @@
     return `${(bytes / 1048576).toFixed(1)}MB`;
   }
 
+  onMount(async () => {
+    try {
+      facetOptions = await api('/library/facets');
+    } catch { /* 옵션 로딩 실패해도 수동 입력 가능 */ }
+  });
+
   async function updatePurpose(e) {
     const val = e.target.value || null;
     const prev = doc.doc_purpose;
@@ -36,6 +46,21 @@
       addToast('error', '용도 변경 실패');
     }
   }
+
+  async function updateFacet(field, value) {
+    const prev = doc[field];
+    doc[field] = value;
+    try {
+      await api(`/documents/${doc.id}`, {
+        method: 'PATCH',
+        body: JSON.stringify({ [field]: value }),
+      });
+      addToast('success', '변경됨');
+    } catch {
+      doc[field] = prev;
+      addToast('error', '변경 실패');
+    }
+  }
 </script>
 
 <div>
@@ -82,4 +107,69 @@
       <dd class="text-text">{formatDate(doc.created_at)}</dd>
     </div>
   </dl>
+
+  <!-- Facet 메타데이터 -->
+  <h4 class="text-xs font-semibold text-dim uppercase mt-3 mb-1.5">탐색 축</h4>
+  <dl class="space-y-1.5 text-xs">
+    <div class="flex justify-between items-center">
+      <dt class="text-dim">회사</dt>
+      <dd>
+        <select
+          value={doc.facet_company || ''}
+          onchange={(e) => updateFacet('facet_company', e.target.value || null)}
+          class="bg-bg border border-default rounded px-1 py-0.5 text-xs text-text outline-none focus:border-accent"
+        >
+          <option value="">-</option>
+          {#each facetOptions.company || [] as v}
+            <option value={v}>{v}</option>
+          {/each}
+        </select>
+      </dd>
+    </div>
+    <div class="flex justify-between items-center">
+      <dt class="text-dim">주제</dt>
+      <dd>
+        <select
+          value={doc.facet_topic || ''}
+          onchange={(e) => updateFacet('facet_topic', e.target.value || null)}
+          class="bg-bg border border-default rounded px-1 py-0.5 text-xs text-text outline-none focus:border-accent"
+        >
+          <option value="">-</option>
+          {#each facetOptions.topic || [] as v}
+            <option value={v}>{v}</option>
+          {/each}
+        </select>
+      </dd>
+    </div>
+    <div class="flex justify-between items-center">
+      <dt class="text-dim">연도</dt>
+      <dd>
+        <select
+          value={doc.facet_year ?? ''}
+          onchange={(e) => updateFacet('facet_year', e.target.value ? Number(e.target.value) : null)}
+          class="bg-bg border border-default rounded px-1 py-0.5 text-xs text-text outline-none focus:border-accent"
+        >
+          <option value="">-</option>
+          {#each facetOptions.year || [] as v}
+            <option value={v}>{v}</option>
+          {/each}
+        </select>
+      </dd>
+    </div>
+    <div class="flex justify-between items-center">
+      <dt class="text-dim">문서유형</dt>
+      <dd>
+        <select
+          value={doc.facet_doctype || ''}
+          onchange={(e) => updateFacet('facet_doctype', e.target.value || null)}
+          class="bg-bg border border-default rounded px-1 py-0.5 text-xs text-text outline-none focus:border-accent"
+        >
+          <option value="">-</option>
+          {#each facetOptions.doctype || [] as v}
+            <option value={v}>{v}</option>
+          {/each}
+        </select>
+      </dd>
+    </div>
+  </dl>
 </div>

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

@@ -287,6 +287,10 @@
       formData.append('file', file);
       formData.append('doc_purpose', 'business');
       formData.append('library_path', activePath || DEFAULT_LIBRARY_PATH);
+      if (activeFacetCompany) formData.append('facet_company', activeFacetCompany);
+      if (activeFacetTopic) formData.append('facet_topic', activeFacetTopic);
+      if (activeFacetYear) formData.append('facet_year', activeFacetYear);
+      if (activeFacetDoctype) formData.append('facet_doctype', activeFacetDoctype);
       try {
         await api('/documents/', { method: 'POST', body: formData });
         success++;
@@ -606,6 +610,18 @@
           {uploadingCount > 0 ? `업로드 중 (${uploadingCount})` : '업로드'}
         </Button>
 
+        <!-- 업로드 시 적용될 facet 미리보기 -->
+        {#if hasAnyFacet}
+          <span class="text-[10px] text-faint">
+            적용: {[
+              activeFacetCompany && `회사:${activeFacetCompany}`,
+              activeFacetTopic && `주제:${activeFacetTopic}`,
+              activeFacetYear && `연도:${activeFacetYear}`,
+              activeFacetDoctype && `유형:${activeFacetDoctype}`,
+            ].filter(Boolean).join(' / ')}
+          </span>
+        {/if}
+
         <!-- 정렬 -->
         <select
           value={activeSort}