Fix architecture diagram and test coverage on site

Architecture diagram was missing the second row of plugins (session,
context, file-io, tools). Test description only listed 2 of 8 actual
test files. Corrected both pages to match the real repo layout.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

index.html

@@ -310,17 +310,14 @@ build/dstalk-cli/dstalk-cli.exe config.toml</code></pre>
 └───────────────────────┬─────────────────────────────┘
                         │ C ABI
 ┌───────────────────────▼─────────────────────────────┐
-│ dstalk-core.dll  —  Plugin Host                     │
-│  Plugin Loader · Service Registry · Event Bus ·     │
-│  Config Manager                                      │
-└──┬───────┬───────┬───────┬───────┬───────┬──────────┘
-   ▼       ▼       ▼       ▼       ▼       ▼
- deepseek  anthropic  network  lsp     session  context
- (ai)      (ai)       (http)   client
-   ▼       ▼       ▼
- config  file-io  tools
-   │       │       │
-   └── Boost.JSON / Boost.Asio / Beast / OpenSSL TLS ──┘</code></pre>
+│ dstalk-core.dll  —  插件宿主                        │
+│  插件加载 · 服务注册 · 事件总线 · 配置管理           │
+├───────────────┬───────────────┬─────────────────────┤
+│ deepseek (ai) │ anthropic (ai)│ network (http)       │
+│ lsp (client)  │ session       │ context              │
+│ config        │ file-io       │ tools                │
+└───────────────┴───────────────┴─────────────────────┘
+   Boost.JSON · Boost.Asio / Beast · OpenSSL TLS</code></pre>
     </div>
   </section>
 
@@ -336,7 +333,7 @@ build/dstalk-cli/dstalk-cli.exe config.toml</code></pre>
         <tr><td>CLI 前端</td><td>ANSI 终端 UI，调用 dstalk/dstalk_api.h</td><td><span class="ok">已启用</span></td></tr>
         <tr><td>GUI 前端</td><td>SDL3 图形化前端，CMake 选项 DSTALK_BUILD_GUI 启用</td><td><span class="ok">已就位</span></td></tr>
         <tr><td>插件</td><td>9 个功能插件 (deepseek · anthropic · network · lsp · session · context · config · file-io · tools)，独立 DLL</td><td><span class="ok">已启用</span></td></tr>
-        <tr><td>测试</td><td>tests/ 提供 host_api_test 与 smoke_test，CTest 集成</td><td><span class="ok">已启用</span></td></tr>
+        <tr><td>测试</td><td>8 个测试文件覆盖插件宿主、事件总线、服务注册、插件加载及各 AI 插件，CTest 集成</td><td><span class="ok">已启用</span></td></tr>
         <tr><td>文档</td><td>docs/tutorial、docs/reference (commands、plugin-abi)</td><td><span class="ok">已发布</span></td></tr>
         <tr><td>示例</td><td>examples/example_plugin 展示插件开发模板</td><td><span class="ok">已提供</span></td></tr>
         <tr><td>依赖管理</td><td>Conan2，boost/1.86.0，openssl/3.4.1</td><td><span class="ok">已配置</span></td></tr>