feat: major enhancement — OS gallery, server rename, traffic chart, backups, VNC toggle, password reset, Redis caching, UX improvements

- Remove client IP removal capability (keep backend methods removed too)
- Add copy-to-clipboard buttons for IP addresses with tooltip feedback
- Replace OS dropdown with tile gallery (grouped, searchable, brand colors, EOL badges) in rebuild panel and checkout page
- Add inline server rename with friendly name generator and RFC 1123 validation
- Add traffic statistics canvas chart with responsive resize in resources panel
- Add backup listing timeline in manage panel with show-all expansion
- Add VNC enable/disable toggle with connection details and password copy
- Add server root password reset with auto-clipboard copy (never displayed)
- Add skeleton loading placeholders, action cooldowns (power 3s, rebuild 30s), progress indicator with elapsed timer
- Sanitize all client-facing error messages (no raw API errors exposed)
- Convert all state-mutating AJAX calls from GET to POST
- Add explicit break after all output() calls in client.php
- Add Redis-backed API response caching (Cache.php): OS templates 10min, traffic/backups 2min, currencies 30min, packages 10min
- Add GitHub Actions workflow for weekly VirtFusion API change detection
- Move cache busting step after semantic-release in publish workflow
- Add endpoint doc generator script and OpenAPI baseline placeholder
- Improve hostname generation entropy (bin2hex random_bytes)
- Add .superpowers/ to .gitignore

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

scripts/generate-endpoint-doc.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Generate API endpoint documentation from PHP source files
+# Usage: bash scripts/generate-endpoint-doc.sh > docs/API-ENDPOINTS.md
+
+MODULE_DIR="modules/servers/VirtFusionDirect"
+
+echo "# VirtFusion WHMCS Module — API Endpoints"
+echo ""
+echo "Auto-generated from source code. Do not edit manually."
+echo ""
+echo "| Endpoint Pattern | HTTP Method | PHP File | Function |"
+echo "|---|---|---|---|"
+
+# Extract API URL patterns from PHP files
+grep -rn "->get\|->post\|->put\|->patch\|->delete" "$MODULE_DIR/lib/" 2>/dev/null | \
+  grep -oP "(?<=>)(get|post|put|patch|delete)\(.*?'[^']*'" | \
+  while IFS= read -r line; do
+    method=$(echo "$line" | grep -oP "^(get|post|put|patch|delete)" | tr '[:lower:]' '[:upper:]')
+    url=$(echo "$line" | grep -oP "'[^']*'" | tr -d "'")
+    echo "| \`$url\` | $method | - | - |"
+  done
+
+echo ""
+echo "## Client Endpoints (client.php)"
+echo ""
+echo "| Action | Description |"
+echo "|---|---|"
+
+grep -n "case '" "$MODULE_DIR/client.php" 2>/dev/null | \
+  while IFS= read -r line; do
+    action=$(echo "$line" | grep -oP "case '\K[^']+")
+    echo "| \`$action\` | - |"
+  done