Link support codes to agent sessions

- Server: Accept support_code param in WebSocket connection
- Server: Link code to session when agent connects, mark as connected
- Server: Mark code as completed when agent disconnects
- Agent: Accept support code from command line argument
- Agent: Send hostname and support_code in WebSocket params
- Portal: Trigger agent download with code in filename
- Portal: Show code reminder in download instructions
- Dashboard: Add machines list fetching (Access tab)
- Add TODO.md for feature tracking

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

TODO.md

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+# GuruConnect Feature Tracking
+
+## Status Legend
+- [ ] Not started
+- [~] In progress
+- [x] Complete
+
+---
+
+## Phase 1: Core MVP
+
+### Infrastructure
+- [x] WebSocket relay server (Axum)
+- [x] Agent WebSocket client
+- [x] Protobuf message protocol
+- [x] Agent authentication (agent_id, api_key)
+- [x] Session management (create, join, leave)
+- [x] Systemd service deployment
+- [x] NPM proxy (connect.azcomputerguru.com)
+
+### Support Codes
+- [x] Generate 6-digit codes
+- [x] Code validation API
+- [x] Code status tracking (pending, connected, completed, cancelled)
+- [~] Link support codes to agent sessions
+- [ ] Code expiration (auto-expire after X minutes)
+- [ ] Support code in agent download URL
+
+### Dashboard
+- [x] Technician login page
+- [x] Support tab with code generation
+- [x] Access tab with connected agents
+- [ ] Session detail panel with tabs
+- [ ] Screenshot thumbnails
+- [ ] Join/Connect button
+
+### Agent (Windows)
+- [x] DXGI screen capture
+- [x] GDI fallback capture
+- [x] WebSocket connection
+- [x] Config persistence (agent_id)
+- [ ] Support code parameter
+- [ ] Hostname/machine info reporting
+- [ ] Screenshot-only mode (for thumbnails)
+
+---
+
+## Phase 2: Remote Control
+
+### Screen Viewing
+- [ ] Web-based viewer (canvas)
+- [ ] Raw frame decoding
+- [ ] Dirty rectangle optimization
+- [ ] Frame rate adaptation
+
+### Input Control
+- [x] Mouse event handling (agent)
+- [x] Keyboard event handling (agent)
+- [ ] Input relay through server
+- [ ] Multi-monitor support
+
+### Encoding
+- [ ] VP9 software encoding
+- [ ] H.264 hardware encoding (NVENC/QSV)
+- [ ] Adaptive quality based on bandwidth
+
+---
+
+## Phase 3: Backstage Tools (like ScreenConnect)
+
+### Device Information
+- [ ] OS version, hostname, domain
+- [ ] Logged-in user
+- [ ] Public/private IP addresses
+- [ ] MAC address
+- [ ] CPU, RAM, disk info
+- [ ] Uptime
+
+### Toolbox APIs
+- [ ] Process list (name, PID, memory)
+- [ ] Installed software list
+- [ ] Windows services list
+- [ ] Event log viewer
+- [ ] Registry browser
+
+### Remote Commands
+- [ ] Run shell commands
+- [ ] PowerShell execution
+- [ ] Command output streaming
+- [ ] Command history per session
+
+### Chat/Messaging
+- [ ] Technician → Client messages
+- [ ] Client → Technician messages
+- [ ] Message history
+
+### File Transfer
+- [ ] Upload files to remote
+- [ ] Download files from remote
+- [ ] Progress tracking
+- [ ] Folder browsing
+
+---
+
+## Phase 4: Session Management
+
+### Timeline/History
+- [ ] Connection events
+- [ ] Session duration tracking
+- [ ] Guest connection history
+- [ ] Activity log
+
+### Session Recording
+- [ ] Record session video
+- [ ] Playback interface
+- [ ] Storage management
+
+### Notes
+- [ ] Per-session notes
+- [ ] Session tagging
+
+---
+
+## Phase 5: Access Mode (Unattended)
+
+### Persistent Agent
+- [ ] Windows service installation
+- [ ] Auto-start on boot
+- [ ] Silent/background mode
+- [ ] Automatic reconnection
+
+### Machine Groups
+- [ ] Company/client organization
+- [ ] Site/location grouping
+- [ ] Custom tags
+- [ ] Filtering/search
+
+### Installer Builder
+- [ ] Customized agent builds
+- [ ] Pre-configured company/site
+- [ ] Silent install options
+- [ ] MSI packaging
+
+---
+
+## Phase 6: Security & Authentication
+
+### Technician Auth
+- [ ] User accounts
+- [ ] Password hashing
+- [ ] JWT tokens
+- [ ] Session management
+
+### MFA
+- [ ] TOTP (Google Authenticator)
+- [ ] Email verification
+
+### Audit Logging
+- [ ] Login attempts
+- [ ] Session access
+- [ ] Command execution
+- [ ] File transfers
+
+### Permissions
+- [ ] Role-based access
+- [ ] Per-client permissions
+- [ ] Feature restrictions
+
+---
+
+## Phase 7: Integrations
+
+### PSA Integration
+- [ ] HaloPSA
+- [ ] Autotask
+- [ ] ConnectWise
+
+### GuruRMM Integration
+- [ ] Dashboard embedding
+- [ ] Single sign-on
+- [ ] Asset linking
+
+---
+
+## Phase 8: Polish
+
+### Branding
+- [ ] White-label support
+- [ ] Custom logos
+- [ ] Custom colors
+
+### Mobile Support
+- [ ] Responsive viewer
+- [ ] Touch input handling
+
+### Annotations
+- [ ] Draw on screen
+- [ ] Pointer highlighting
+- [ ] Screenshot annotations
+
+---
+
+## Current Sprint
+
+### In Progress
+1. Link support codes to agent sessions
+2. Show connected status in dashboard
+
+### Next Up
+1. Support code in agent download/config
+2. Device info reporting from agent
+3. Screenshot thumbnails
+
+---
+
+## Notes
+
+### ScreenConnect Feature Reference (from screenshots)
+- Support session list with idle times and connection bars
+- Detail panel with tabbed interface:
+  - Join/Screen (thumbnail, Join button)
+  - Info (device details)
+  - Timeline (connection history)
+  - Chat (messaging)
+  - Commands (shell execution)
+  - Notes
+  - Toolbox (processes, software, events, services)
+  - File transfer
+  - Logs
+  - Settings