Enhance CLI Build Duration Output with Human-Readable Formatting (#4591)

* Use humantime for build duration formatting in CLI

Replaces manual millisecond formatting with humantime::format_duration for improved readability of build duration logs. Adds humantime as a dependency in Cargo.toml.

* Format build duration with millisecond precision

Changed build duration logging to use millisecond precision instead of default formatting to avoid microsecond/nanosecond noise.

* Refactor duration formatting to use helper function to reduce code duplication.

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

Cargo.lock

@@ -5521,6 +5521,7 @@ dependencies = [
  "headers",
  "home",
  "html_parser",
+ "humantime",
  "hyper 1.8.1",
  "hyper-rustls 0.27.7",
  "hyper-util",

packages/cli/Cargo.toml

@@ -108,6 +108,7 @@ tracing-subscriber = { version = "0.3.19", features = [
     "fmt",
 ] }
 console-subscriber = { version = "0.4.1", optional = true }
+humantime = "2.2.0"
 tracing = { workspace = true }
 ansi-to-tui = { workspace = true }
 ansi-to-html = { workspace = true }

packages/cli/src/serve/runner.rs

@@ -604,13 +604,13 @@ impl AppServer {
 
             if self.client.builds_opened == 0 {
                 tracing::info!(
-                    "Build completed successfully in {GLOW_STYLE}{:?}ms{GLOW_STYLE:#}, launching app! 💫",
-                    time_taken.as_millis()
+                    "Build completed successfully in {GLOW_STYLE}{}{GLOW_STYLE:#}, launching app! 💫",
+                    format_duration_ms(time_taken)
                 );
             } else {
                 tracing::info!(
-                    "Build completed in {GLOW_STYLE}{:?}ms{GLOW_STYLE:#}",
-                    time_taken.as_millis()
+                    "Build completed in {GLOW_STYLE}{}{GLOW_STYLE:#}",
+                    format_duration_ms(time_taken)
                 );
             }
 
@@ -1308,3 +1308,10 @@ fn is_wsl() -> bool {
 
     false
 }
+
+/// Format a Duration for human-readable output with millisecond precision.
+fn format_duration_ms(d: Duration) -> String {
+    // Format duration with millisecond precision to avoid microsecond/nanosecond noise.
+    // See: https://github.com/chronotope/humantime/issues/35
+    humantime::format_duration(Duration::from_millis(d.as_millis() as u64)).to_string()
+}