fix(baoyu-md, baoyu-post-to-x): decode URL-encoded image paths

Obsidian creates markdown image links with URL-encoded filenames
(e.g. `Pasted%20image%2020260524.png`) but the actual file has spaces.
Add `decodeURIComponent()` before path resolution in both baoyu-md's
shared `resolveImagePath()` and baoyu-post-to-x's independent version.

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

skills/baoyu-post-to-x/scripts/md-to-html.ts

@@ -181,11 +181,12 @@ async function resolveImagePath(imagePath: string, baseDir: string, tempDir: str
     return localPath;
   }
 
-  if (path.isAbsolute(imagePath)) {
-    return imagePath;
+  const decoded = decodeURIComponent(imagePath);
+  if (path.isAbsolute(decoded)) {
+    return decoded;
   }
 
-  return path.resolve(baseDir, imagePath);
+  return path.resolve(baseDir, decoded);
 }
 
 function escapeHtml(text: string): string {