chore: 立项 graphify-analysis

Graphify v0.4.8 源码全面解析 + GitNexus 替换评估报告,单页深色主题。

- public/index.html: ~600 行报告(架构/流程/逐模块/GraphRAG 验证/GitNexus 对比/建议)
- Dockerfile + nginx.conf: Coolify 静态部署
- .memory/analysis.md: 完整调研笔记
- graphify/ 源码快照不入库(作为只读参考)

结论: 不要替换 GitNexus, 可选抄 Graphify 7 个细节。

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

nginx.conf

@@ -0,0 +1,43 @@
+server {
+    listen 80 default_server;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    charset utf-8;
+
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_comp_level 6;
+    gzip_types
+        text/plain
+        text/css
+        text/javascript
+        text/xml
+        application/javascript
+        application/json
+        application/xml
+        image/svg+xml;
+
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+
+    location = /healthz {
+        access_log off;
+        add_header Content-Type text/plain;
+        return 200 "ok\n";
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+        add_header Cache-Control "public, max-age=300";
+    }
+
+    location ~* \.(css|js|svg|woff2?|ttf|otf|eot|png|jpe?g|gif|webp|ico)$ {
+        expires 7d;
+        add_header Cache-Control "public, max-age=604800, immutable";
+    }
+}