Optimize dashboard performance for responsive Tab key navigation

- Replace 6 separate filter operations with single-pass metric categorization in update_metrics
- Reduce CPU overhead from 6x to 1x work per metric update cycle
- Fix Tab key sluggishness caused by competing expensive filtering operations
- Maintain exact same functionality with significantly better performance
- Improve UI responsiveness for host switching and navigation
- Bump version to 0.1.58

Cargo.lock

@@ -270,7 +270,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.56"
+version = "0.1.57"
 dependencies = [
  "anyhow",
  "chrono",
@@ -292,7 +292,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.56"
+version = "0.1.57"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -315,7 +315,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.56"
+version = "0.1.57"
 dependencies = [
  "chrono",
  "serde",