feat: Go backend, enhanced search, new widgets, Docker deploy

Major changes:
- Add Go backend (backend/) with microservices architecture
- Enhanced master-agents-svc: reranker, content-classifier, stealth-crawler,
  proxy-manager, media-search, fastClassifier, language detection
- New web-svc widgets: KnowledgeCard, ProductCard, ProfileCard, VideoCard,
  UnifiedCard, CardGallery, InlineImageGallery, SourcesPanel, RelatedQuestions
- Improved discover-svc with discover-db integration
- Docker deployment improvements (Caddyfile, vendor.sh, BUILD.md)
- Library-svc: project_id schema migration
- Remove deprecated finance-svc and travel-svc
- Localization improvements across services

Made-with: Cursor

services/library-svc/Dockerfile

@@ -1,7 +1,9 @@
+# syntax=docker/dockerfile:1
 FROM node:22-alpine AS builder
 WORKDIR /app
 COPY package*.json ./
-RUN npm ci
+COPY --from=npm-cache / /tmp/npm-cache
+RUN npm install --cache /tmp/npm-cache --prefer-offline --no-audit
 COPY tsconfig.json ./
 COPY src ./src
 RUN npm run build
@@ -9,7 +11,9 @@ RUN npm run build
 FROM node:22-alpine
 WORKDIR /app
 COPY package*.json ./
-RUN npm ci --omit=dev
+COPY --from=npm-cache / /tmp/npm-cache
+RUN npm install --omit=dev --cache /tmp/npm-cache --prefer-offline --no-audit
 COPY --from=builder /app/dist ./dist
+COPY drizzle ./drizzle
 EXPOSE 3009
 CMD ["node", "dist/index.js"]

services/library-svc/drizzle/0002_project_id.sql

@@ -0,0 +1,2 @@
+ALTER TABLE library_threads ADD COLUMN IF NOT EXISTS project_id TEXT;
+CREATE INDEX IF NOT EXISTS idx_library_threads_project_id ON library_threads(project_id);

services/library-svc/src/db/push.ts

@@ -10,6 +10,8 @@ async function main() {
   await client.unsafe(sql0);
   const sql1 = readFileSync(join(process.cwd(), 'drizzle/0001_thread_messages.sql'), 'utf8');
   await client.unsafe(sql1);
+  const sql2 = readFileSync(join(process.cwd(), 'drizzle/0002_project_id.sql'), 'utf8');
+  await client.unsafe(sql2);
   console.log('Schema applied');
   await client.end();
 }

services/library-svc/src/db/schema.ts

@@ -3,6 +3,7 @@ import { integer, jsonb, pgTable, text, timestamp } from 'drizzle-orm/pg-core';
 export const threads = pgTable('library_threads', {
   id: text('id').primaryKey(),
   userId: text('user_id').notNull(),
+  projectId: text('project_id'),
   title: text('title').notNull(),
   createdAt: timestamp('created_at').defaultNow().notNull(),
   sources: jsonb('sources').$type<string[]>().default([]),

services/library-svc/src/index.ts

@@ -46,20 +46,25 @@ app.get('/metrics', async (_req, reply) => {
 });
 app.get('/ready', async () => ({ status: 'ready' }));
 
-app.get('/api/v1/library/threads', async (req, reply) => {
+app.get<{ Querystring: { projectId?: string } }>('/api/v1/library/threads', async (req, reply) => {
   const userId = await getUserIdFromToken(req.headers.authorization);
   if (!userId) {
     return reply.status(401).send({ error: 'Authorization required' });
   }
+  const projectId = req.query.projectId;
   try {
+    const where = projectId
+      ? and(eq(threads.userId, userId), eq(threads.projectId, projectId))
+      : eq(threads.userId, userId);
     const list = await db
       .select()
       .from(threads)
-      .where(eq(threads.userId, userId))
+      .where(where)
       .orderBy(desc(threads.createdAt));
     const chats = list.map((r) => ({
       id: r.id,
       title: r.title,
+      projectId: r.projectId ?? undefined,
       createdAt: r.createdAt?.toISOString?.() ?? r.createdAt,
       sources: (r.sources as string[]) ?? [],
       files: (r.files as { fileId: string; name: string }[]) ?? [],
@@ -72,13 +77,13 @@ app.get('/api/v1/library/threads', async (req, reply) => {
 });
 
 app.post<{
-  Body: { id?: string; title: string; sources?: string[]; files?: { fileId: string; name: string }[] };
+  Body: { id?: string; title: string; projectId?: string; sources?: string[]; files?: { fileId: string; name: string }[] };
 }>('/api/v1/library/threads', async (req, reply) => {
   const userId = await getUserIdFromToken(req.headers.authorization);
   if (!userId) {
     return reply.status(401).send({ error: 'Authorization required' });
   }
-  const { id, title, sources = [], files = [] } = req.body ?? {};
+  const { id, title, projectId, sources = [], files = [] } = req.body ?? {};
   if (!title?.trim()) {
     return reply.status(400).send({ error: 'title is required' });
   }
@@ -89,6 +94,7 @@ app.post<{
       .values({
         id: threadId,
         userId,
+        projectId: projectId ?? null,
         title: title.trim(),
         sources,
         files,
@@ -97,6 +103,7 @@ app.post<{
     return {
       id: inserted.id,
       title: inserted.title,
+      projectId: inserted.projectId ?? undefined,
       createdAt: inserted.createdAt?.toISOString?.() ?? inserted.createdAt,
       sources: (inserted.sources as string[]) ?? [],
       files: (inserted.files as { fileId: string; name: string }[]) ?? [],
@@ -156,6 +163,7 @@ app.get<{ Params: { id: string } }>('/api/v1/library/threads/:id', async (req, r
       chat: {
         id: t.id,
         title: t.title,
+        projectId: t.projectId ?? undefined,
         createdAt: t.createdAt?.toISOString?.() ?? t.createdAt,
         sources: (t.sources as string[]) ?? [],
         files: (t.files as { fileId: string; name: string }[]) ?? [],
@@ -186,6 +194,7 @@ app.post<{
     return reply.status(401).send({ error: 'Authorization required' });
   }
   const { id } = req.params;
+  const body = req.body ?? {};
   const {
     messageId,
     query,
@@ -194,7 +203,17 @@ app.post<{
     status = 'answering',
     sources = [],
     files = [],
-  } = req.body ?? {};
+    projectId,
+  } = body as {
+    messageId?: string;
+    query?: string;
+    backendId?: string;
+    responseBlocks?: Block[];
+    status?: string;
+    sources?: string[];
+    files?: { fileId: string; name: string }[];
+    projectId?: string;
+  };
   if (!messageId?.trim() || !query?.trim()) {
     return reply.status(400).send({ error: 'messageId and query are required' });
   }
@@ -204,6 +223,7 @@ app.post<{
       await db.insert(threads).values({
         id,
         userId,
+        projectId: projectId ?? null,
         title: query.length > 100 ? query.slice(0, 100) + '...' : query,
         sources,
         files,
@@ -211,6 +231,9 @@ app.post<{
       t = { id };
     }
     const statusVal = (['answering', 'completed', 'error'] as const).includes(status as 'answering' | 'completed' | 'error') ? (status as 'answering' | 'completed' | 'error') : 'answering';
+    if (t.id) {
+      await db.update(threads).set({ sources, files }).where(eq(threads.id, t.id));
+    }
     const [existing] = await db.select().from(threadMessages).where(and(eq(threadMessages.threadId, t.id), eq(threadMessages.messageId, messageId)));
     if (existing) {
       await db