style: unify keyboard shortcut hints across tools using Pastel style

- Add shortcut hints below tool descriptions in Figlet and Units pages
- Revert experimental button-based shortcut layout in Units
- Remove redundant shortcut hints from Units footer
- Ensure consistent kbd tag styling across the application

app/(app)/figlet/page.tsx

@@ -9,6 +9,12 @@ export default function FigletPage() {
           <p className="text-muted-foreground">
             ASCII Art Text Generator with 373 Fonts
           </p>
+          <div className="mt-3 flex flex-wrap gap-2 text-xs text-muted-foreground">
+            <kbd className="px-2 py-1 bg-muted rounded border">/</kbd>
+            <span>Focus Search</span>
+            <kbd className="px-2 py-1 bg-muted rounded border ml-3">ESC</kbd>
+            <span>Clear Search</span>
+          </div>
         </div>
         <FigletConverter />
       </div>

app/(app)/units/page.tsx

@@ -9,6 +9,14 @@ export default function UnitsPage() {
           <p className="text-muted-foreground">
             Smart unit converter with 187 units across 23 categories
           </p>
+          <div className="mt-3 flex flex-wrap gap-2 text-xs text-muted-foreground">
+            <kbd className="px-2 py-1 bg-muted rounded border">/</kbd>
+            <span>Focus Search</span>
+            <kbd className="px-2 py-1 bg-muted rounded border ml-3">Ctrl+K</kbd>
+            <span>Command Palette</span>
+            <kbd className="px-2 py-1 bg-muted rounded border ml-3">ESC</kbd>
+            <span>Close Dialogs</span>
+          </div>
         </div>
         <MainConverter />
       </div>

components/units/ui/Footer.tsx

@@ -65,24 +65,6 @@ export default function Footer() {
                 </a>
               </li>
             </ul>
-
-            {/* Keyboard Shortcuts */}
-            <div className="mt-4">
-              <h4 className="font-semibold text-sm mb-2">Keyboard Shortcuts</h4>
-              <ul className="space-y-1 text-xs text-muted-foreground">
-                <li>
-                  <kbd className="px-1.5 py-0.5 bg-muted rounded">/</kbd> Focus search
-                </li>
-                <li>
-                  <kbd className="px-1.5 py-0.5 bg-muted rounded">Ctrl</kbd>
-                  {' + '}
-                  <kbd className="px-1.5 py-0.5 bg-muted rounded">K</kbd> Command palette
-                </li>
-                <li>
-                  <kbd className="px-1.5 py-0.5 bg-muted rounded">ESC</kbd> Close dialogs
-                </li>
-              </ul>
-            </div>
           </div>
         </div>