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/

src/web/ui-dist/img/fx_error.svg

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 width="48px" height="48px" viewBox="0 0 48 48" enable-background="new 0 0 48 48" xml:space="preserve">
-<g id="x">
-</g>
-<path fill="#800000" d="M41,1H7C3.687,1,1,3.687,1,7v34c0,3.313,2.687,6,6,6h34c3.313,0,6-2.688,6-6V7C47,3.687,44.313,1,41,1z
-	 M39.436,34.23l-5.205,5.205L24,29.205l-10.23,10.23L8.564,34.23L18.795,24L8.564,13.769l5.205-5.204L24,18.795l10.23-10.23
-	l5.205,5.204L29.205,24L39.436,34.23z"/>
-</svg>