refactor: lint cleanups and helpers

src/auto-reply/templating.ts

@@ -25,7 +25,7 @@ export type TemplateContext = MsgContext & {
 export function applyTemplate(str: string | undefined, ctx: TemplateContext) {
   if (!str) return "";
   return str.replace(/{{\s*(\w+)\s*}}/g, (_, key) => {
-    const value = (ctx as Record<string, unknown>)[key];
-    return value == null ? "" : String(value);
+    const value = ctx[key as keyof TemplateContext];
+    return value ?? "";
   });
 }