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deleted file mode 100644
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diff --git a/assets/directory-structure.svg b/assets/directory-structure.svg
deleted file mode 100644
index 7de6208d..00000000
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-  <text x="220" y="261" fill="#334155" font-size="8">FastAPI entry, CORS, lifespan</text>
-  <text x="60" y="275" fill="#64748b" font-size="9">│   ├── celery_app.py</text>
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-  <text x="100" y="420" fill="#475569" font-size="8">│       │   ├── storage_services/</text>
-  <text x="310" y="420" fill="#334155" font-size="8">Extraction · Forgetting · Reflection · Search · Clustering</text>
-  <text x="100" y="433" fill="#475569" font-size="8">│       │   ├── agent/</text>
-  <text x="280" y="433" fill="#334155" font-size="8">LangGraph-based memory agent</text>
-  <text x="100" y="446" fill="#475569" font-size="8">│       │   ├── ontology_services/</text>
-  <text x="310" y="446" fill="#334155" font-size="8">OWL/TTL entity type system</text>
-  <text x="100" y="459" fill="#475569" font-size="8">│       │   ├── analytics/</text>
-  <text x="280" y="459" fill="#334155" font-size="8">Hot tags, activity stats</text>
-  <text x="100" y="472" fill="#475569" font-size="8">│       │   └── utils/</text>
-  <text x="280" y="472" fill="#334155" font-size="8">Jinja2 prompts, embedder, config</text>
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-  <text x="80" y="488" fill="#64748b" font-size="9">│       ├── rag/</text>
-  <text x="240" y="488" fill="#334155" font-size="8">RAG pipeline · GraphRAG · doc parsing</text>
-  <text x="80" y="501" fill="#64748b" font-size="9">│       ├── workflow/</text>
-  <text x="240" y="501" fill="#334155" font-size="8">Workflow engine (nodes, adapters)</text>
-  <text x="80" y="514" fill="#64748b" font-size="9">│       ├── tools/</text>
-  <text x="240" y="514" fill="#334155" font-size="8">Builtin · Custom · MCP tools</text>
-  <text x="80" y="527" fill="#64748b" font-size="9">│       ├── agent/</text>
-  <text x="240" y="527" fill="#334155" font-size="8">Agent framework</text>
-  <text x="80" y="540" fill="#64748b" font-size="9">│       ├── permissions/</text>
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-  <text x="80" y="553" fill="#64748b" font-size="9">│       └── storage/</text>
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-  <text x="60" y="572" fill="#64748b" font-size="9">├── migrations/</text>
-  <text x="200" y="572" fill="#334155" font-size="8">Alembic DB migrations</text>
-  <text x="60" y="586" fill="#64748b" font-size="9">├── docker-compose.yml</text>
-  <text x="240" y="586" fill="#334155" font-size="8">API + 3 Celery workers + Beat</text>
-  <text x="60" y="600" fill="#64748b" font-size="9">└── env.example</text>
-  <text x="200" y="600" fill="#334155" font-size="8">Environment variable template</text>
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-  <text x="760" y="246" fill="#94a3b8" font-size="9">└── src/</text>
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-  <text x="780" y="261" fill="#64748b" font-size="9">├── App.tsx</text>
-  <text x="920" y="261" fill="#334155" font-size="8">Root component with routing</text>
-  <text x="780" y="275" fill="#64748b" font-size="9">├── api/</text>
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-  <text x="780" y="294" fill="#34d399" font-size="9">├── views/</text>
-  <text x="920" y="294" fill="#334155" font-size="8">Page-level route components</text>
-  <text x="800" y="308" fill="#475569" font-size="8">│   ├── MemoryManagement/</text>
-  <text x="980" y="308" fill="#334155" font-size="8">Memory CRUD &amp; visualization</text>
-  <text x="800" y="321" fill="#475569" font-size="8">│   ├── MemoryExtractionEngine/</text>
-  <text x="980" y="321" fill="#334155" font-size="8">Extraction pipeline UI</text>
-  <text x="800" y="334" fill="#475569" font-size="8">│   ├── ForgettingEngine/</text>
-  <text x="980" y="334" fill="#334155" font-size="8">Memory decay management</text>
-  <text x="800" y="347" fill="#475569" font-size="8">│   ├── SelfReflectionEngine/</text>
-  <text x="980" y="347" fill="#334155" font-size="8">Reflection task dashboard</text>
-  <text x="800" y="360" fill="#475569" font-size="8">│   ├── EmotionEngine/</text>
-  <text x="980" y="360" fill="#334155" font-size="8">Emotion extraction view</text>
-  <text x="800" y="373" fill="#475569" font-size="8">│   ├── KnowledgeBase/</text>
-  <text x="980" y="373" fill="#334155" font-size="8">RAG knowledge base management</text>
-  <text x="800" y="386" fill="#475569" font-size="8">│   ├── Ontology/</text>
-  <text x="980" y="386" fill="#334155" font-size="8">Entity/relation type config</text>
-  <text x="800" y="399" fill="#475569" font-size="8">│   ├── Workflow/</text>
-  <text x="980" y="399" fill="#334155" font-size="8">Visual workflow editor</text>
-  <text x="800" y="412" fill="#475569" font-size="8">│   ├── Conversation/</text>
-  <text x="980" y="412" fill="#334155" font-size="8">Chat interface</text>
-  <text x="800" y="425" fill="#475569" font-size="8">│   ├── ApplicationManagement/</text>
-  <text x="980" y="425" fill="#334155" font-size="8">App &amp; API key management</text>
-  <text x="800" y="438" fill="#475569" font-size="8">│   ├── ModelManagement/</text>
-  <text x="980" y="438" fill="#334155" font-size="8">LLM model configuration</text>
-  <text x="800" y="451" fill="#475569" font-size="8">│   └── UserManagement/</text>
-  <text x="980" y="451" fill="#334155" font-size="8">Members, spaces, permissions</text>
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-  <text x="780" y="470" fill="#64748b" font-size="9">├── components/</text>
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-  <text x="780" y="484" fill="#64748b" font-size="9">├── hooks/</text>
-  <text x="920" y="484" fill="#334155" font-size="8">Custom React hooks</text>
-  <text x="780" y="498" fill="#64748b" font-size="9">├── store/</text>
-  <text x="920" y="498" fill="#334155" font-size="8">Zustand state management</text>
-  <text x="780" y="512" fill="#64748b" font-size="9">├── i18n/</text>
-  <text x="920" y="512" fill="#334155" font-size="8">i18next · zh / en translations</text>
-  <text x="780" y="526" fill="#64748b" font-size="9">├── routes/</text>
-  <text x="920" y="526" fill="#334155" font-size="8">Route definitions</text>
-  <text x="780" y="540" fill="#64748b" font-size="9">├── utils/</text>
-  <text x="920" y="540" fill="#334155" font-size="8">format · request · stream · validator</text>
-  <text x="780" y="554" fill="#64748b" font-size="9">└── assets/</text>
-  <text x="920" y="554" fill="#334155" font-size="8">Images, fonts</text>
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-  <!-- tech badges bottom -->
-  <text x="760" y="580" fill="#475569" font-size="8">Stack: React 18 · TypeScript · Vite · Ant Design 5 · Tailwind CSS 4</text>
-  <text x="760" y="594" fill="#475569" font-size="8">       Zustand · AntV X6 · ECharts · D3.js · i18next · Axios</text>
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