Initial commit: clean project structure

PLAN.md

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+# smsPrat Archive Player - Development Plan
+
+## Project Overview
+A web-based archive player for SMS Teletext messages. The application plays back historical messages in real-time (or relative to a playback clock) into a fixed-size chat window.
+
+## Core Requirements
+- **Fixed-Size Chat Window**: A scrollable box with a specific height/width.
+- **Playback Logic**: A frontend clock that triggers message display when the timestamp matches.
+- **Read-Only**: No input field; strictly for viewing archived content.
+- **Message Format**: 
+    - User ID
+    - User Name
+    - Message Text
+- **Visuals**: Plain/functional initially, with future plans for "Teletext" styling.
+
+## Technical Stack
+- **Frontend**: React (TypeScript) + Vite
+- **Backend**: Node.js (Express) + TypeScript
+- **Styling**: Bootstrap (for basic layout)
+
+## Progress Tracker
+- [x] Backend scaffolding
+- [x] Basic Express server with mock data
+- [ ] Frontend scaffolding (Vite/React/TS)
+- [ ] Implement Playback Clock logic
+- [ ] Create Fixed-Size Chat Component
+- [ ] Connect Frontend to Backend API
+- [ ] Apply Teletext styling
+
+## Current Status
+The backend server is set up in `/server` and is ready to serve mock message data. Frontend scaffolding was initiated.