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>

packages/baoyu-md/src/images.ts

@@ -103,9 +103,10 @@ export async function resolveImagePath(
     return localPath;
   }
 
-  const resolved = path.isAbsolute(imagePath)
-    ? imagePath
-    : path.resolve(baseDir, imagePath);
+  const decoded = decodeURIComponent(imagePath);
+  const resolved = path.isAbsolute(decoded)
+    ? decoded
+    : path.resolve(baseDir, decoded);
   return resolveLocalWithFallback(resolved, logLabel);
 }