fix: Prisma 7.x schema fix, feed API safe casts, daily report Session 6

Author: uet-santx

uet_web/Docs_software_design/daily_reports/2026-03-20.md

@@ -358,3 +358,56 @@ Result 3: Pioneer Anomaly Data (Ω-dist: 0.0000, scale match: ✅)
 8. ✅ OmegaSearch verified working
 9. ✅ 4 Rust modules added to workspace and compiling
 10. ✅ Dependency paths fixed for all modules
+
+---
+
+## Session 6: Platform Specs + Phase 0+1 Implementation (same day)
+
+### Platform Specification Documents (7 new specs)
+
+Researched open-source projects and wrote 7 comprehensive spec documents into `platform_specs/`:
+
+| # | Document | Content |
+|---|----------|---------|
+| 28 | OPEN_SOURCE_STACK_SELECTION | Evaluation matrix: Rocket.Chat, LiveKit, Tiptap+Yjs, LibreChat, Stripe |
+| 29 | SOCIAL_FEED_AND_PROFILES | Feed, posts, follows, media upload, Prisma models, API routes |
+| 30 | REALTIME_CHAT_AND_MESSAGING | Rocket.Chat deploy, OAuth SSO, AI bot, embedded chat |
+| 31 | WORKSPACE_AND_COLLABORATION | Discord-like workspaces, channels, roles, Tiptap collab docs |
+| 32 | VIDEO_AND_VOICE | LiveKit WebRTC SFU, voice channels, screen share |
+| 33 | CREDIT_AND_SUBSCRIPTION | Credit model, Stripe billing, AI usage metering, UET→Credit exchange |
+| 34 | INTEGRATION_ARCHITECTURE | Full system diagram, Docker Compose, SSO, data ownership |
+
+### Phase 0: Foundation Fixes (Implemented)
+
+1. **Auth env vars** — Replaced all 8 hardcoded `localhost:3001` in auth pages with `NEXT_PUBLIC_API_URL` env var
+2. **Prisma schema extended** — 180 → 368 lines, added 10 new models:
+   - `Follow` (social graph), `Vote` (upvote/downvote), `Media` (file uploads)
+   - `Workspace`, `WorkspaceMember`, `Document` (collaboration)
+   - `CreditBalance`, `CreditTransaction`, `Subscription` (billing)
+   - User profile fields: `displayName`, `bio`, `avatarUrl`, `institution`, `website`
+   - Post: added `isVerified`, `votes`, `media` relations
+   - Project: added `workspaceId` for workspace linkage
+3. **Workchat redirect** — `/workchat` now redirects to `/chat`
+4. **Docker env** — Added `NEXT_PUBLIC_API_URL` to docker-compose.yml
+5. **Prisma 7.x fix** — Removed `url` from datasource block (moved to prisma.config.ts)
+
+### Phase 1: Academic Social Feed (Implemented)
+
+**New Pages:**
+- `/feed` — Infinite scroll feed with Latest/Trending/Following modes, tag filtering
+- `/feed/new` — Post composer with title, Markdown content, tag system
+- `/profile/[userId]` — User profile with bio, stats, recent posts, follow button
+
+**New API Routes:**
+- `GET /api/feed` — Paginated feed with cursor, mode, tag filters
+- `POST /api/posts/[id]/upvote` — Toggle upvote/downvote with atomic counter
+- `POST /api/follow/[userId]` — Follow user
+- `DELETE /api/follow/[userId]` — Unfollow user
+- `GET /api/profile/[userId]` — Profile data with follower counts + recent posts
+
+**New Components:**
+- `FeedCard` — Post card with author info, content preview, tags, vote buttons, comment count
+
+**Navigation:**
+- Added Feed link to landing page navbar
+- Fixed Topics link to use locale prefix

uet_web/prisma/schema.prisma

@@ -9,7 +9,6 @@ generator client {
 
 datasource db {
   provider = "postgresql"
-  url      = env("DATABASE_URL")
 }
 
 // ==========================================

uet_web/src/app/api/feed/route.ts

@@ -40,14 +40,15 @@ export async function GET(request: Request) {
           select: {
             id: true,
             email: true,
-            name: true,
-            image: true,
+            displayName: true,
+            avatarUrl: true,
+            institution: true,
             reputation: true,
           } as any,
         },
         tags: true,
         _count: {
-          select: { comments: true } as any,
+          select: { comments: true, votes: true } as any,
         },
       },
     })