Fix transitional icons and selection highlighting visibility

Resolved issues with transitional service icons not being properly visible:

- Removed 3-second timeout that was clearing pending transitions prematurely
- Fixed selection highlighting disappearing when transitional icons appeared
- Implemented conditional coloring for transitional icons:
  - Blue when service is not selected
  - Dark background color when service is selected (for visibility against blue selection)
- Transitions now persist until actual service status changes occur

Both selection highlighting and transitional icons are now visible simultaneously.

Cargo.lock

@@ -270,7 +270,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.27"
+version = "0.1.28"
 dependencies = [
  "anyhow",
  "chrono",
@@ -291,7 +291,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.27"
+version = "0.1.28"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -314,7 +314,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.27"
+version = "0.1.28"
 dependencies = [
  "chrono",
  "serde",