Add remaining source changes: resource data, refactored pages, updated styles

- Add example resources (agent, output-style, rule, skill)
   - Refactor legacy skill pages to use generic resource system
   - Update favicon, global styles, models, skills lib, and stats
   - Update PLAN.md

src/pages/[slug]/i.ts

@@ -2,6 +2,7 @@ import type { APIRoute } from 'astro';
 import { getSkill } from '../../lib/skills';
 import { isPowerShell } from '../../lib/sync';
 
+/** Backward compat: /<slug>/i — installs skill to .claude/skills/ */
 export const GET: APIRoute = async ({ params, url, request }) => {
   const { slug } = params;
   const skill = await getSkill(slug!);
@@ -17,7 +18,7 @@ export const GET: APIRoute = async ({ params, url, request }) => {
         '$ErrorActionPreference = "Stop"',
         '$Dir = ".claude\\skills"',
         'New-Item -ItemType Directory -Force -Path $Dir | Out-Null',
-        `Invoke-WebRequest -Uri "${origin}/${slug}" -OutFile (Join-Path $Dir "${slug}.md")`,
+        `Invoke-WebRequest -Uri "${origin}/skills/${slug}" -OutFile (Join-Path $Dir "${slug}.md")`,
         `Write-Host "✓ Installed ${skill.name} to $Dir\\${slug}.md"`,
         '',
       ].join('\n')
@@ -25,7 +26,7 @@ export const GET: APIRoute = async ({ params, url, request }) => {
         '#!/usr/bin/env bash',
         'set -euo pipefail',
         'mkdir -p .claude/skills',
-        `curl -fsSL "${origin}/${slug}" -o ".claude/skills/${slug}.md"`,
+        `curl -fsSL "${origin}/skills/${slug}" -o ".claude/skills/${slug}.md"`,
         `echo "✓ Installed ${skill.name} to .claude/skills/${slug}.md"`,
         '',
       ].join('\n');