fix: bank display showing 1 instead of 0 + build fixes

- Removed 'e.bank||1' falsy trap (was converting bank 0 to 1)
- Fixed TypeScript errors: cp guard, unused vars, path aliases
- Added base: '/ui/' to vite config for correct asset paths
- Bank persistence already implemented (localStorage pedal-footswitch-bank)
- Rebuilt and deployed to src/web/ui-dist/

ui/src/App.tsx

@@ -575,6 +575,7 @@ function PedalContent() {
         if (names.length > 0) setBankNames(names);
 
         const cp = state.current_preset;
+        if (!cp) return;
         const bank = data.banks?.[cp.bank];
         const preset = bank?.presets?.[cp.program];
         if (preset?.chain) {