feat: FormBlock 컨트롤러 정리 및 15.1 SEO/head 메타 관리 추가

src/app/editor/panels/ProjectPropertiesPanel.tsx

@@ -104,6 +104,65 @@ export function ProjectPropertiesPanel() {
         />
       </div>
 
+      <div className="space-y-2 border-t border-slate-800 pt-3">
+        <h4 className="text-[11px] font-semibold text-slate-200">SEO / 메타</h4>
+
+        <label className="flex flex-col gap-1">
+          <span className="text-slate-400">SEO 타이틀</span>
+          <input
+            className="w-full rounded border border-slate-700 bg-slate-900 px-2 py-1 text-xs outline-none focus:border-sky-500"
+            aria-label="SEO 타이틀"
+            placeholder={projectConfig.title || "페이지 제목"}
+            value={projectConfig.seoTitle ?? ""}
+            onChange={(e) => updateProjectConfig({ seoTitle: e.target.value })}
+          />
+        </label>
+
+        <label className="flex flex-col gap-1">
+          <span className="text-slate-400">메타 디스크립션</span>
+          <textarea
+            className="w-full rounded border border-slate-700 bg-slate-900 px-2 py-1 text-[11px] outline-none focus:border-sky-500 min-h-[56px]"
+            aria-label="메타 디스크립션"
+            placeholder="검색엔진 및 SNS 공유에 노출될 페이지 설명을 입력하세요."
+            value={projectConfig.seoDescription ?? ""}
+            onChange={(e) => updateProjectConfig({ seoDescription: e.target.value })}
+          />
+        </label>
+
+        <label className="flex flex-col gap-1">
+          <span className="text-slate-400">OG/Twitter 이미지 URL</span>
+          <input
+            className="w-full rounded border border-slate-700 bg-slate-900 px-2 py-1 text-xs outline-none focus:border-sky-500"
+            aria-label="OG/Twitter 이미지 URL"
+            placeholder="예: https://example.com/og-image.png"
+            value={projectConfig.seoOgImageUrl ?? ""}
+            onChange={(e) => updateProjectConfig({ seoOgImageUrl: e.target.value })}
+          />
+        </label>
+
+        <label className="flex flex-col gap-1">
+          <span className="text-slate-400">Canonical URL</span>
+          <input
+            className="w-full rounded border border-slate-700 bg-slate-900 px-2 py-1 text-xs outline-none focus:border-sky-500"
+            aria-label="Canonical URL"
+            placeholder="예: https://example.com/landing"
+            value={projectConfig.seoCanonicalUrl ?? ""}
+            onChange={(e) => updateProjectConfig({ seoCanonicalUrl: e.target.value })}
+          />
+        </label>
+
+        <label className="flex items-center gap-2 text-[11px] text-slate-300">
+          <input
+            type="checkbox"
+            className="h-3 w-3 rounded border-slate-600 bg-slate-900"
+            aria-label="검색 엔진에 노출하지 않기 (noindex)"
+            checked={Boolean(projectConfig.seoNoIndex)}
+            onChange={(e) => updateProjectConfig({ seoNoIndex: e.target.checked })}
+          />
+          <span>검색 엔진에 노출하지 않기 (noindex)</span>
+        </label>
+      </div>
+
       <div className="space-y-1">
         <label className="flex flex-col gap-1">
           <span className="text-slate-400">페이지 head HTML</span>