Add mouse support and improve terminal resize handling

- Add mouse click support for hostname selection in title bar
- Fix right-aligned hostname position calculation
- Add mouse scroll support for both panels
- Add mouse click to select service rows
- Add right-click popup menu for service actions (Start/Stop/Logs)
- Add hover highlighting for popup menu items
- Improve terminal resize crash protection with 90x15 minimum size
- Add "Host:" prefix and separators to status bar
- Move NixOS metrics from system panel to status bar
- Change "... X more below" indicator to use border color
- Remove service name from popup menu title

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.258"
+version = "0.1.259"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.258"
+version = "0.1.259"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -325,7 +325,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.258"
+version = "0.1.259"
 dependencies = [
  "chrono",
  "serde",