feat: AI 서비스 및 AI 어시스턴트 전용 페이지 추가

- ai-service: Ollama 기반 AI 서비스 (분류, 시맨틱 검색, RAG Q&A, 패턴 분석)
- AI 어시스턴트 페이지: 채팅형 Q&A, 시맨틱 검색, 패턴 분석, 분류 테스트
- 권한 시스템에 ai_assistant 페이지 등록 (기본 비활성)
- 기존 페이지에 AI 기능 통합 (대시보드, 수신함, 관리함)
- docker-compose, gateway, nginx 설정 업데이트

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

system3-nonconformance/web/static/js/api.js

@@ -308,6 +308,161 @@ function checkPageAccess(pageName) {
     return user;
 }
 
+// AI API
+const AiAPI = {
+    getSimilarIssues: async (issueId, limit = 5) => {
+        try {
+            const res = await fetch(`/ai-api/similar/${issueId}?n_results=${limit}`, {
+                headers: { 'Authorization': `Bearer ${TokenManager.getToken()}` }
+            });
+            if (!res.ok) return { available: false, results: [] };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 유사 검색 실패:', e);
+            return { available: false, results: [] };
+        }
+    },
+    searchSimilar: async (query, limit = 5, filters = {}) => {
+        try {
+            const res = await fetch('/ai-api/similar/search', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Authorization': `Bearer ${TokenManager.getToken()}`
+                },
+                body: JSON.stringify({ query, n_results: limit, ...filters })
+            });
+            if (!res.ok) return { available: false, results: [] };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 검색 실패:', e);
+            return { available: false, results: [] };
+        }
+    },
+    classifyIssue: async (description, detailNotes = '') => {
+        try {
+            const res = await fetch('/ai-api/classify', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Authorization': `Bearer ${TokenManager.getToken()}`
+                },
+                body: JSON.stringify({ description, detail_notes: detailNotes })
+            });
+            if (!res.ok) return { available: false };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 분류 실패:', e);
+            return { available: false };
+        }
+    },
+    generateDailyReport: async (date, projectId) => {
+        try {
+            const res = await fetch('/ai-api/report/daily', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Authorization': `Bearer ${TokenManager.getToken()}`
+                },
+                body: JSON.stringify({ date, project_id: projectId })
+            });
+            if (!res.ok) return { available: false };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 보고서 생성 실패:', e);
+            return { available: false };
+        }
+    },
+    syncEmbeddings: async () => {
+        try {
+            const res = await fetch('/ai-api/embeddings/sync', {
+                method: 'POST',
+                headers: { 'Authorization': `Bearer ${TokenManager.getToken()}` }
+            });
+            if (!res.ok) return { status: 'error' };
+            return await res.json();
+        } catch (e) {
+            return { status: 'error' };
+        }
+    },
+    checkHealth: async () => {
+        try {
+            const res = await fetch('/ai-api/health');
+            return await res.json();
+        } catch (e) {
+            return { status: 'disconnected' };
+        }
+    },
+    // RAG: 해결방안 제안
+    suggestSolution: async (issueId) => {
+        try {
+            const res = await fetch(`/ai-api/rag/suggest-solution/${issueId}`, {
+                method: 'POST',
+                headers: { 'Authorization': `Bearer ${TokenManager.getToken()}` }
+            });
+            if (!res.ok) return { available: false };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 해결방안 제안 실패:', e);
+            return { available: false };
+        }
+    },
+    // RAG: 자연어 질의
+    askQuestion: async (question, projectId = null) => {
+        try {
+            const res = await fetch('/ai-api/rag/ask', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Authorization': `Bearer ${TokenManager.getToken()}`
+                },
+                body: JSON.stringify({ question, project_id: projectId })
+            });
+            if (!res.ok) return { available: false };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 질의 실패:', e);
+            return { available: false };
+        }
+    },
+    // RAG: 패턴 분석
+    analyzePattern: async (description) => {
+        try {
+            const res = await fetch('/ai-api/rag/pattern', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Authorization': `Bearer ${TokenManager.getToken()}`
+                },
+                body: JSON.stringify({ description })
+            });
+            if (!res.ok) return { available: false };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI 패턴 분석 실패:', e);
+            return { available: false };
+        }
+    },
+    // RAG: 강화 분류 (과거 사례 참고)
+    classifyWithRAG: async (description, detailNotes = '') => {
+        try {
+            const res = await fetch('/ai-api/rag/classify', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Authorization': `Bearer ${TokenManager.getToken()}`
+                },
+                body: JSON.stringify({ description, detail_notes: detailNotes })
+            });
+            if (!res.ok) return { available: false };
+            return await res.json();
+        } catch (e) {
+            console.warn('AI RAG 분류 실패:', e);
+            return { available: false };
+        }
+    }
+};
+
 // 프로젝트 API
 const ProjectsAPI = {
     getAll: (activeOnly = false) => {