refactor(display): remove unavailable marker and use empty marker in /provider (#2097)

Author: amitksingh1490

crates/forge_main/src/display_constants.rs

@@ -56,9 +56,6 @@ pub mod markers {
 
     /// Indicates a built-in (non-user-defined) component
     pub const BUILT_IN: &str = "[built-in]";
-
-    /// Indicates a resource is unavailable (e.g., provider not configured)
-    pub const UNAVAILABLE: &str = "[unavailable]";
 }
 
 /// Type discriminator for commands, agents, and custom entries.
@@ -131,8 +128,8 @@ mod tests {
     fn test_markers_have_square_brackets() {
         assert!(markers::BUILT_IN.starts_with('['));
         assert!(markers::BUILT_IN.ends_with(']'));
-        assert!(markers::UNAVAILABLE.starts_with('['));
-        assert!(markers::UNAVAILABLE.ends_with(']'));
+        assert!(markers::EMPTY.starts_with('['));
+        assert!(markers::EMPTY.ends_with(']'));
     }
 
     #[test]

crates/forge_main/src/model.rs

@@ -77,11 +77,11 @@ impl Display for CliProvider {
                 if let Some(domain) = provider.url.domain() {
                     write!(f, " [{domain}]")?;
                 } else {
-                    write!(f, " {}", markers::UNAVAILABLE)?;
+                    write!(f, " {}", markers::EMPTY)?;
                 }
             }
             AnyProvider::Template(_) => {
-                write!(f, "  {name:<name_width$} {}", markers::UNAVAILABLE)?;
+                write!(f, "  {name:<name_width$} {}", markers::EMPTY)?;
             }
         }
         Ok(())
@@ -1099,7 +1099,7 @@ mod tests {
         });
         let formatted = format!("{}", CliProvider(fixture));
         let actual = strip_ansi_codes(&formatted);
-        let expected = format!("  Anthropic           {}", markers::UNAVAILABLE);
+        let expected = format!("  Anthropic           {}", markers::EMPTY);
         assert_eq!(actual, expected);
     }
 
@@ -1119,7 +1119,7 @@ mod tests {
         });
         let formatted = format!("{}", CliProvider(fixture));
         let actual = strip_ansi_codes(&formatted);
-        let expected = format!("✓ Forge               {}", markers::UNAVAILABLE);
+        let expected = format!("✓ Forge               {}", markers::EMPTY);
         assert_eq!(actual, expected);
     }