Fix create_prompt is_public bug, conditional version bump, and add Jotai prompts atoms

- Pass is_public from request body in create_prompt route
- Only bump version on content field changes (name, prompt, mode),
  not on is_public toggle
- Add prompts query and mutation atoms (atomWithQuery/atomWithMutation)
  with TanStack Query caching, replacing manual useEffect fetches
- Update PromptPicker, PromptsContent, and CommunityPromptsContent
  to consume shared atoms instead of local state

surfsense_web/atoms/prompts/prompts-query.atoms.ts

@@ -0,0 +1,23 @@
+import { atomWithQuery } from "jotai-tanstack-query";
+import { promptsApiService } from "@/lib/apis/prompts-api.service";
+import { cacheKeys } from "@/lib/query-client/cache-keys";
+
+export const promptsAtom = atomWithQuery(() => {
+	return {
+		queryKey: cacheKeys.prompts.all(),
+		staleTime: 5 * 60 * 1000,
+		queryFn: async () => {
+			return promptsApiService.list();
+		},
+	};
+});
+
+export const publicPromptsAtom = atomWithQuery(() => {
+	return {
+		queryKey: cacheKeys.prompts.public(),
+		staleTime: 2 * 60 * 1000,
+		queryFn: async () => {
+			return promptsApiService.listPublic();
+		},
+	};
+});