style: auto-fix ESLint issues (curly braces and formatting)

- Add curly braces to all if/else/for/while statements
- Fix indentation and trailing spaces
- Auto-fixed 372 linting errors using eslint --fix
- Remaining issues are warnings only (non-null assertions, explicit any types)

src/cli/setup/channels.ts

@@ -87,10 +87,10 @@ export async function setupChannels(p: Prompter, builder: ConfigBuilder): Promis
     if (choice === 'more') {
       const moreChoice = await p.choose('Channel:', MORE_CHANNEL_OPTIONS);
       const setup = CHANNEL_SETUP[moreChoice];
-      if (setup) await setup(p, builder);
+      if (setup) {await setup(p, builder);}
     } else {
       const setup = CHANNEL_SETUP[choice];
-      if (setup) await setup(p, builder);
+      if (setup) {await setup(p, builder);}
     }
 
     p.println();