Implement real-time terminal popup for system rebuild operations

- Add terminal popup UI component with 80% screen coverage and terminal styling
- Extend ZMQ protocol with CommandOutputMessage for streaming output
- Implement real-time output streaming in agent system rebuild handler
- Add keyboard controls (ESC/Q to close, ↑↓ to scroll) for popup interaction
- Fix system panel Build display to show actual NixOS build instead of config hash
- Update service filters in README with wildcard patterns for better matching
- Add periodic progress updates during nixos-rebuild execution
- Integrate command output handling in dashboard main loop

CLAUDE.md

@@ -28,18 +28,21 @@ All keyboard navigation and service selection features successfully implemented:
 - ✅ **Smart Panel Switching**: Only cycles through panels with data (backup panel conditional)
 - ✅ **Scroll Support**: All panels support content scrolling with proper overflow indicators
 
-**Current Status - October 25, 2025:**
+**Current Status - October 26, 2025:**
 - All keyboard navigation features working correctly ✅
 - Service selection cursor implemented with focus-aware highlighting ✅
 - Panel scrolling fixed for System, Services, and Backup panels ✅
 - Build display working: "Build: 25.05.20251004.3bcc93c" ✅
-- Configuration hash display: Currently shows git hash, needs to be fixed ❌
+- Agent version display working: "Agent: 3kvc03nd" ✅
+- Cross-host version comparison implemented ✅
+- Automated binary release system working ✅
+- SMART data consolidated into disk collector ✅
 
-**Target Layout:**
+**Current Layout:**
 ```
 NixOS:
 Build: 25.05.20251004.3bcc93c
-Config: d8ivwiar  # Should show nix store hash (8 chars) from deployed system
+Agent: 3kvc03nd  # Shows agent version (nix store hash)
 Active users: cm, simon
 CPU:
 ● Load: 0.02 0.31 0.86 • 3000MHz
@@ -55,7 +58,8 @@ Storage:
 **System panel layout fully implemented with blue tree symbols ✅**
 **Tree symbols now use consistent blue theming across all panels ✅**
 **Overflow handling restored for all widgets ("... and X more") ✅**
-**Agent hash display working correctly ✅**
+**Agent version display working correctly ✅**
+**Cross-host version comparison logging warnings ✅**
 
 ### Current Keyboard Navigation Implementation