Add missing views and new entity view

[bburda]

Summary

Add missing UI views for new entity types (Apps, Functions, Faults) and improve overall user experience.

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Proposed solution

1. New Views

Apps View

• List all ROS 2 nodes as "Apps" in tree
• Show app details: node name, namespace, FQN
• Display app dependencies (depends-on)
• Navigate between app and its parent component

Functions View

• List logical functions (capability groupings)
• Show function hosts (which apps implement it)
• Aggregated data view from all hosts
• Aggregated operations from all hosts

Faults Dashboard

• Real-time fault stream using SSE
• Fault list with severity filtering
• Fault details with snapshots
• Clear fault actions
• Badge count on sidebar when faults active

2. Entity Tree Improvements

Areas/
├── powertrain/
│   ├── Components/
│   │   └── engine_component/
│   │       ├── data/
│   │       ├── operations/
│   │       └── configurations/
│   ├── Apps/                    # NEW
│   │   └── engine_node/
│   │       ├── data/
│   │       ├── operations/
│   │       ├── configurations/
│   │       └── faults/          # NEW
│   └── Functions/               # NEW
│       └── engine_monitoring/
└── ...

3. Operations Panel Improvements

• Update to use Executions model
• Show execution history list
• Real-time execution status updates
• Execution result/error display
• Cancel running executions
• Execution timeline visualization

4. Connection Dialog Improvements

• Server capabilities display after connect
• SOVD version info
• Optional authentication form
• Remember multiple servers (history)
• Connection health indicator in header