fix(web): correct skill detection to look for SKILL.md instead of prompt.md

The Skills page was only showing 4 skills instead of 38 because it was
looking for prompt.md files instead of SKILL.md files in the skills
directory. Updated the detection logic to check for SKILL.md for skills
and prompt.md for agents.

Author: kaitranntt

src/web-server/shared-routes.ts

@@ -75,8 +75,9 @@ function getSharedItems(type: 'commands' | 'skills' | 'agents'): SharedItem[] {
 
     for (const entry of entries) {
       if (entry.isDirectory()) {
-        // Skill/Agent: look for prompt.md
-        const promptPath = path.join(sharedDir, entry.name, 'prompt.md');
+        // Skill/Agent: look for SKILL.md for skills, prompt.md for agents
+        const markdownFile = type === 'skills' ? 'SKILL.md' : 'prompt.md';
+        const promptPath = path.join(sharedDir, entry.name, markdownFile);
         if (fs.existsSync(promptPath)) {
           const content = fs.readFileSync(promptPath, 'utf8');
           const description = extractDescription(content);