Add printer lookup page and fiscal week theme styling

- Add printerlookup.asp for Zabbix integration (lookup by IP/FQDN)
- Add fiscal week sidebar styling for all 16 themes
- Update CLAUDE.md with External Integrations section
- Fix fiscal week box centering with inline styles

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

includes/leftsidebar.asp

@@ -37,9 +37,9 @@ End If
        <h5 class="logo-text">West Jefferson</h5>
      </a>
    </div>
-   <div style="padding: 10px 0; background: #2a2a2a; border-top: 1px solid #3a3a3a; border-bottom: 1px solid #3a3a3a; text-align: center;">
-     <span style="font-size: 10px; color: #888; text-transform: uppercase; letter-spacing: 1px;">Fiscal Week</span>
-     <div style="font-size: 22px; font-weight: 600; color: #fff;"><%=fiscalWeek%></div>
+   <div class="fiscal-week-box" style="width:100%; text-align:center; padding:15px 0;">
+     <span class="fiscal-label" style="display:block; text-align:center;">Fiscal Week</span>
+     <div class="fiscal-number" style="display:block; text-align:center;"><%=fiscalWeek%></div>
    </div>
    <ul class="sidebar-menu do-nicescrol">
       <li class="sidebar-header">MAIN NAVIGATION</li>