fix(web): 修復 webpack build 錯誤 — 重複 flexShrink + firing_count undefined

header.tsx: 移除重複的 flexShrink: 0 屬性 (TS1117)
classic/page.tsx: firing_count ?? 0 處理 undefined (TS2322)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/app/[locale]/classic/page.tsx

@@ -193,7 +193,7 @@ function MonitoringTools() {
                     fontSize: 10, padding: '1px 7px', borderRadius: 8, fontWeight: 600,
                     background: 'rgba(245,158,11,0.12)', color: '#F59E0B',
                   }}>
-                    {tDash('alertBadge', { count: tool.firing_count })}
+                    {tDash('alertBadge', { count: tool.firing_count ?? 0 })}
                   </span>
                 ) : (
                   <span style={{

apps/web/src/components/layout/header.tsx

@@ -75,7 +75,6 @@ export function Header({
         background: '#faf9f3',
         overflow: 'hidden',
         transition: 'width 0.3s ease',
-        flexShrink: 0,
       }}>
         {/* NemoClaw mini SVG */}
         <div style={{ width: 36, height: 36, flexShrink: 0 }}>