refactor: compact component spacing throughout app

PHASE 3 - COMPONENT SPACING OPTIMIZATION:

components/IdentityCheckOverlay.tsx:
- Modal padding: p-8 sm:p-10 → p-4 md:p-6
- Spacing: space-y-8 → space-y-3 md:space-y-4

components/CameraView.tsx:
- Container gaps: gap-6 → gap-3 md:gap-4

components/AIOnboarding.tsx (4 fixes):
- Main sections: gap-6 → gap-3 md:gap-4
- Live mode: gap-6 → gap-3 md:gap-4
- Results form: gap-6 → gap-3 md:gap-4
- Step view: gap-6 → gap-3 md:gap-4

components/ScannerSection.tsx:
- Container spacing: space-y-6 → space-y-3 md:space-y-4
- Scanner section: space-y-4 → space-y-2 md:space-y-3

components/LogsTable.tsx (2 fixes):
- Empty state: gap-6 → gap-3 md:gap-4
- Modal: p-6 sm:p-10 space-y-8 → p-4 md:p-6 space-y-3 md:space-y-4

Results:
- All 291 tests passing
- Zero TypeScript errors
- Mobile-first spacing applied throughout
- Consistent responsive pattern across all components

frontend/components/LogsTable.tsx

@@ -34,7 +34,7 @@ export default function LogsTable({ logs, loading }: LogsTableProps) {
 
   if (logs.length === 0) {
     return (
-      <div className="bg-surface/20 border border-slate-800/50 border-dashed rounded-[2.5rem] py-20 flex flex-col items-center justify-center text-center gap-6">
+      <div className="bg-surface/20 border border-slate-800/50 border-dashed rounded-[2.5rem] py-20 flex flex-col items-center justify-center text-center gap-3 md:gap-4">
         <div className="w-16 h-16 bg-surface rounded-2xl flex items-center justify-center text-slate-700 border border-slate-800">
           <ArrowDownCircle size={32} />
         </div>
@@ -97,7 +97,7 @@ export default function LogsTable({ logs, loading }: LogsTableProps) {
       {/* Selected Log Modal */}
       {selectedLog && (
         <div className="fixed inset-0 z-[100] flex items-end sm:items-center justify-center p-0 sm:p-4 bg-background/90 animate-in fade-in duration-300">
-          <div className="bg-surface border-t sm:border border-slate-800 rounded-t-[2.5rem] sm:rounded-[3rem] p-6 sm:p-10 max-w-lg w-full shadow-2xl space-y-8 animate-in slide-in-from-bottom-10 duration-300 overflow-hidden">
+          <div className="bg-surface border-t sm:border border-slate-800 rounded-t-[2.5rem] sm:rounded-[3rem] p-4 md:p-6 max-w-lg w-full shadow-2xl space-y-3 md:space-y-4 animate-in slide-in-from-bottom-10 duration-300 overflow-hidden">
             <div className="flex justify-between items-start">
               <div className="space-y-1 pr-4">
                 <div className={cn(