feat(ui): full‑width ShadTable across app; fix rent dialog width; correct equipment pagination

- ShadTable: ensure full-width via LayoutBuilder+ConstrainedBox minWidth
- BaseListScreen: default data area padding = 0 for table edge-to-edge
- Vendor/Model/User/Company/Inventory/Zipcode: set columnSpanExtent per column
  and add final filler column to absorb remaining width; pin date/status/actions
  widths; ensure date text is single-line
- Equipment: unify card/border style; define fixed column widths + filler;
  increase checkbox column to 56px to avoid overflow
- Rent list: migrate to ShadTable.list with fixed widths + filler column
- Rent form dialog: prevent infinite width by bounding ShadProgress with
  SizedBox and remove Expanded from option rows; add safe selectedOptionBuilder
- Admin list: fix const with non-const argument in table column extents
- Services/Controller: remove hardcoded perPage=10; use BaseListController
  perPage; trust server meta (total/totalPages) in equipment pagination
- widgets/shad_table: ConstrainedBox(minWidth=viewport) so table stretches

Run: flutter analyze → 0 errors (warnings remain).

lib/screens/common/templates/form_layout_template.dart

@@ -32,7 +32,7 @@ class FormLayoutTemplate extends StatelessWidget {
       appBar: AppBar(
         title: Text(
           title,
-          style: ShadcnTheme.headingH3.copyWith( // Phase 10: 표준 헤딩 스타일
+          style: ShadcnTheme.headingH3.copyWith(
             fontWeight: FontWeight.w600,
             color: ShadcnTheme.foreground,
           ),
@@ -76,7 +76,7 @@ class FormLayoutTemplate extends StatelessWidget {
           ),
         ],
       ),
-      padding: EdgeInsets.fromLTRB(24, 16, 24, 24),
+      padding: const EdgeInsets.fromLTRB(24, 16, 24, 24),
       child: Row(
         children: [
           Expanded(
@@ -122,30 +122,30 @@ class FormSection extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ShadcnCard(
-      padding: padding ?? EdgeInsets.all(24),
+      padding: padding ?? const EdgeInsets.all(24),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           if (title != null) ...[
             Text(
               title!,
-              style: ShadcnTheme.bodyLarge.copyWith( // Phase 10: 표준 바디 라지
+              style: ShadcnTheme.bodyLarge.copyWith(
                 fontWeight: FontWeight.w600,
-                color: ShadcnTheme.foreground, // Phase 10: 전경색
+                color: ShadcnTheme.foreground,
               ),
             ),
             if (subtitle != null) ...[
-              SizedBox(height: 4),
+              const SizedBox(height: 4),
               Text(
                 subtitle!,
-                style: ShadcnTheme.bodyMedium.copyWith( // Phase 10: 표준 바디 미디엄
-                  color: ShadcnTheme.mutedForeground, // Phase 10: 뮤트된 전경색
+                style: ShadcnTheme.bodyMedium.copyWith(
+                  color: ShadcnTheme.mutedForeground,
                 ),
               ),
             ],
-            SizedBox(height: 20),
-            Divider(color: ShadcnTheme.border, height: 1), // Phase 10: 테두리 색상
-            SizedBox(height: 20),
+            const SizedBox(height: 20),
+            Divider(color: ShadcnTheme.border, height: 1),
+            const SizedBox(height: 20),
           ],
           if (children.isNotEmpty)
             ...children.asMap().entries.map((entry) {
@@ -153,7 +153,7 @@ class FormSection extends StatelessWidget {
               final child = entry.value;
               if (index < children.length - 1) {
                 return Padding(
-                  padding: EdgeInsets.only(bottom: 16),
+                  padding: const EdgeInsets.only(bottom: 16),
                   child: child,
                 );
               } else {
@@ -190,33 +190,23 @@ class FormFieldWrapper extends StatelessWidget {
           children: [
             Text(
               label,
-              style: TextStyle(
-                fontSize: 14,
-                fontWeight: FontWeight.w500,
-                color: Color(0xFF374151),
-              ),
+              style: ShadcnTheme.labelMedium,
             ),
             if (required)
               Text(
                 ' *',
-                style: TextStyle(
-                  fontSize: 14,
-                  color: Color(0xFFEF4444),
-                ),
+                style: ShadcnTheme.labelMedium.copyWith(color: ShadcnTheme.destructive),
               ),
           ],
         ),
         if (hint != null) ...[
-          SizedBox(height: 4),
+          const SizedBox(height: 4),
           Text(
             hint!,
-            style: TextStyle(
-              fontSize: 12,
-              color: Color(0xFF6B7280),
-            ),
+            style: ShadcnTheme.bodyXs,
           ),
         ],
-        SizedBox(height: 8),
+        const SizedBox(height: 8),
         child,
       ],
     );
@@ -236,10 +226,10 @@ class UIConstants {
   static const double columnWidthLarge = 200.0;  // 긴 텍스트
   
   // 색상
-  static const Color backgroundColor = Color(0xFFF5F7FA);
-  static const Color cardBackground = Colors.white;
-  static const Color borderColor = Color(0xFFE5E7EB);
-  static const Color textPrimary = Color(0xFF1A1F36);
-  static const Color textSecondary = Color(0xFF6B7280);
-  static const Color textMuted = Color(0xFF9CA3AF);
-}
+  static const Color backgroundColor = ShadcnTheme.backgroundSecondary;
+  static const Color cardBackground = ShadcnTheme.card;
+  static const Color borderColor = ShadcnTheme.border;
+  static const Color textPrimary = ShadcnTheme.foreground;
+  static const Color textSecondary = ShadcnTheme.foregroundSecondary;
+  static const Color textMuted = ShadcnTheme.foregroundMuted;
+}