feat: migrate to react-markdown for robust markdown rendering

- Replace custom markdown parser with react-markdown + remark-gfm
- Fix document link navigation (./ and ../ references)
- Simplify doc viewing flow (direct markdown content instead of parsed structure)
- Update electron main process to only use api folder for docs
- Add blueprint loading from docs/blueprint.md dynamically
- Fix sidebar file selection path matching
- Update preload scripts for new API structure

src/components/blueprint/BlueprintPage.tsx

@@ -1,7 +1,31 @@
 import Scene3D from './Scene3D';
 import DetailPanel from './DetailPanel';
+import { useBlueprintStore } from '../../store/blueprintStore';
+import { useEffect, useCallback } from 'react';
+import { parseBlueprintFromMd } from '../../data/blueprintParser';
 
-export default function BlueprintPage() {
+interface BlueprintPageProps {
+  docsPath: string;
+}
+
+export default function BlueprintPage({ docsPath }: BlueprintPageProps) {
+  const setBlueprintData = useBlueprintStore(state => state.setBlueprintData);
+  
+  const loadBlueprint = useCallback(async () => {
+    if (!docsPath || !window.electronAPI) return;
+    
+    const blueprintPath = docsPath.replace(/\\/g, '/') + '/blueprint.md';
+    const content = await window.electronAPI.readDocFile(blueprintPath);
+    if (content) {
+      const data = parseBlueprintFromMd(content);
+      setBlueprintData(data);
+    }
+  }, [docsPath, setBlueprintData]);
+  
+  useEffect(() => {
+    loadBlueprint();
+  }, [loadBlueprint]);
+  
   return (
     <div className="flex h-full">
       <div className="flex-1">