feat: support to adjust writing style (#290)

* feat: implment backend for adjust report style

* feat: add web part

* fix test cases

* fix: fix typing

---------

Co-authored-by: Henry Li <henry1943@163.com>

web/src/app/settings/tabs/general-tab.tsx

@@ -25,7 +25,6 @@ import type { Tab } from "./types";
 
 const generalFormSchema = z.object({
   autoAcceptedPlan: z.boolean(),
-  enableBackgroundInvestigation: z.boolean(),
   maxPlanIterations: z.number().min(1, {
     message: "Max plan iterations must be at least 1.",
   }),
@@ -35,6 +34,9 @@ const generalFormSchema = z.object({
   maxSearchResults: z.number().min(1, {
     message: "Max search results must be at least 1.",
   }),
+  // Others
+  enableBackgroundInvestigation: z.boolean(),
+  reportStyle: z.enum(["academic", "popular_science", "news", "social_media"]),
 });
 
 export const GeneralTab: Tab = ({