feat(09-02): add shortcuts config package with default bindings and Wails persistence

- Create backend/shortcuts/config.go with DefaultBindings(), ApplyDefaults(), Validate()
- Wire Shortcuts field into main Config struct with TOML persistence
- Add GetShortcuts, SetShortcuts, SetShortcut, ResetShortcuts Wails binding methods
- Regenerate Wails TypeScript bindings for new config methods
- Fix wsl lint in library.go (blank line before logger call)

frontend/wailsjs/go/config/Config.js

@@ -22,6 +22,10 @@ export function GetScanConcurrency() {
   return window['go']['config']['Config']['GetScanConcurrency']();
 }
 
+export function GetShortcuts() {
+  return window['go']['config']['Config']['GetShortcuts']();
+}
+
 export function GetThemeAccentColor() {
   return window['go']['config']['Config']['GetThemeAccentColor']();
 }
@@ -38,6 +42,10 @@ export function Load() {
   return window['go']['config']['Config']['Load']();
 }
 
+export function ResetShortcuts() {
+  return window['go']['config']['Config']['ResetShortcuts']();
+}
+
 export function Save() {
   return window['go']['config']['Config']['Save']();
 }
@@ -66,6 +74,14 @@ export function SetScanConcurrency(arg1) {
   return window['go']['config']['Config']['SetScanConcurrency'](arg1);
 }
 
+export function SetShortcut(arg1, arg2) {
+  return window['go']['config']['Config']['SetShortcut'](arg1, arg2);
+}
+
+export function SetShortcuts(arg1) {
+  return window['go']['config']['Config']['SetShortcuts'](arg1);
+}
+
 export function SetThemeAccentColor(arg1) {
   return window['go']['config']['Config']['SetThemeAccentColor'](arg1);
 }