AG X v2.0.3 - Antigravity fork with multi-provider support

Features:
- Welcome screen on first run (provider choice before LS starts)
- 15+ AI providers (Google Gemini, OpenAI, Anthropic, DeepSeek, Ollama, etc.)
- Provider config syncs to endpoints.json for translation proxy
- Built-in Node.js translation proxy for non-native backends
- Auto-update support, tray integration, URI scheme handler

README.md

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+# AG X (Antigravity fork) v2.0.3
+
+AI-Powered Code Intelligence — agentic desktop application with multi-provider AI support.
+
+## What's New in v2.0.3
+
+### 🐛 Critical Fix: Provider Selection Flow
+- **Welcome screen now shows BEFORE the Language Server starts** — on first run, the user picks a provider before the LS launches, preventing the Google OAuth prompt from appearing for non-Google providers.
+- **Provider config syncs to `~/.codex/endpoints.json`** — the provider choice from the welcome screen and settings panel is properly synced to the endpoints config that the translation proxy reads.
+- **"Another AI Provider" flow fixed** — when user picks a custom provider, the settings panel opens and the app waits for the user to configure and save their provider before starting the Language Server.
+
+### Changes
+| File | Change |
+|---|---|
+| `main.js` | Restructured startup: welcome screen before LS start |
+| `main.js` | Added `syncProviderToEndpoints()` function |
+| `main.js` | Google Gemini handler sets active endpoint in `endpoints.json` |
+| `main.js` | Custom provider handler waits for settings save before continuing |
+| `providerSettings.js` | Save handler syncs to `endpoints.json` and emits `provider:settings-saved` |
+| `providerSettings.js` | Added close-settings IPC listener |
+| `settings.html` | Save handler shows restart notification and auto-closes |
+
+## Features
+- 🔮 Google Gemini (OAuth) — zero config
+- 🔌 15+ AI Providers (OpenAI, Anthropic, DeepSeek, Ollama, etc.)
+- 🧠 Built-in translation proxy for non-native backends
+- 🔄 Auto-update support
+- 🖥️ System tray integration
+
+## Installation
+```bash
+sudo dpkg -i ag-x_2.0.3_amd64.deb
+```
+
+## First Run
+On first launch, AG X shows a welcome screen where you choose:
+1. **Google Gemini** — Sign in with Google (OAuth, no API key needed)
+2. **Another AI Provider** — Pick from 15+ providers and enter your API key
+
+## Configuration
+- Provider settings: `~/.ag-x/ag-x/provider_config.json`
+- Proxy endpoints: `~/.codex/endpoints.json`
+- Menu → AI Provider Settings to change provider anytime