feat: монорепо миграция, Discover/SearxNG улучшения

- Миграция на монорепозиторий (apps/frontend, apps/chat-service, etc.)
- Discover: проверка SearxNG, понятное empty state при ненастроенном поиске
- searxng.ts: валидация URL, проверка JSON-ответа, авто-добавление http://
- docker/searxng-config: настройки для JSON API SearxNG

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/shared-types/src/types.ts

@@ -0,0 +1,127 @@
+export type ToolCall = {
+  id: string;
+  name: string;
+  arguments: Record<string, unknown>;
+};
+
+export type SystemMessage = {
+  role: 'system';
+  content: string;
+};
+
+export type AssistantMessage = {
+  role: 'assistant';
+  content: string;
+  tool_calls?: ToolCall[];
+};
+
+export type UserMessage = {
+  role: 'user';
+  content: string;
+};
+
+export type ToolMessage = {
+  role: 'tool';
+  id: string;
+  name: string;
+  content: string;
+};
+
+export type ChatTurnMessage = UserMessage | AssistantMessage;
+
+export type Message =
+  | UserMessage
+  | AssistantMessage
+  | SystemMessage
+  | ToolMessage;
+
+export type Chunk = {
+  content: string;
+  metadata: Record<string, any>;
+};
+
+export type TextBlock = {
+  id: string;
+  type: 'text';
+  data: string;
+};
+
+export type SourceBlock = {
+  id: string;
+  type: 'source';
+  data: Chunk[];
+};
+
+export type SuggestionBlock = {
+  id: string;
+  type: 'suggestion';
+  data: string[];
+};
+
+export type WidgetBlock = {
+  id: string;
+  type: 'widget';
+  data: {
+    widgetType: string;
+    params: Record<string, any>;
+  };
+};
+
+export type ReasoningResearchBlock = {
+  id: string;
+  type: 'reasoning';
+  reasoning: string;
+};
+
+export type SearchingResearchBlock = {
+  id: string;
+  type: 'searching';
+  searching: string[];
+};
+
+export type SearchResultsResearchBlock = {
+  id: string;
+  type: 'search_results';
+  reading: Chunk[];
+};
+
+export type ReadingResearchBlock = {
+  id: string;
+  type: 'reading';
+  reading: Chunk[];
+};
+
+export type UploadSearchingResearchBlock = {
+  id: string;
+  type: 'upload_searching';
+  queries: string[];
+};
+
+export type UploadSearchResultsResearchBlock = {
+  id: string;
+  type: 'upload_search_results';
+  results: Chunk[];
+};
+
+export type ResearchBlockSubStep =
+  | ReasoningResearchBlock
+  | SearchingResearchBlock
+  | SearchResultsResearchBlock
+  | ReadingResearchBlock
+  | UploadSearchingResearchBlock
+  | UploadSearchResultsResearchBlock;
+
+export type ResearchBlock = {
+  id: string;
+  type: 'research';
+  data: {
+    subSteps: ResearchBlockSubStep[];
+  };
+};
+
+export type Block =
+  | TextBlock
+  | SourceBlock
+  | SuggestionBlock
+  | WidgetBlock
+  | ResearchBlock;