fix(perry-ui-gtk4): upcast pango sub-attrs to Attribute (v0.5.889)

PR #716 added crates/perry-ui-gtk4/src/widgets/attributed_text.rs
with pango Attribute construction that doesn't compile against the
pango-rs sub-attribute type hierarchy. `AttrInt::new_weight()` etc.
return concrete subtype (AttrInt, AttrSize, AttrColor); the push
closure expects the parent `pango::Attribute`. Need explicit
.upcast() per the glib type system.

The error didn't surface on #716's CI because the gtk4 doc-tests
matrix entry is disabled (v0.5.874 timeouts), and the release build
matrix is the only path that builds perry-ui-gtk4 cross-arch.
Surfaced on v0.5.888's release run.

5 sites updated. Uses gtk4::glib::object::Cast trait import.

Author: proggeramlug

CLAUDE.md

@@ -8,7 +8,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 Perry is a native TypeScript compiler written in Rust that compiles TypeScript source code directly to native executables. It uses SWC for TypeScript parsing and LLVM for code generation.
 
-**Current Version:** 0.5.875
+**Current Version:** 0.5.889
 
 
 ## TypeScript Parity Status

Cargo.toml

@@ -188,7 +188,7 @@ opt-level = "s"       # Optimize for size in stdlib
 opt-level = 3
 
 [workspace.package]
-version = "0.5.875"
+version = "0.5.889"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"

crates/perry-ui-gtk4/src/widgets/attributed_text.rs

@@ -95,23 +95,28 @@ pub fn append(
             buf.attrs.insert(attr);
         };
 
+        // pango-rs sub-attribute types (`AttrInt`, `AttrSize`, `AttrColor`)
+        // are subclasses of `pango::Attribute` in the glib type system.
+        // `.upcast()` lifts them to the parent type the push closure
+        // expects. Without the upcast the build fails with E0308
+        // mismatched-types (introduced in PR #716, surfaced when the
+        // release-packages workflow built perry-ui-gtk4 cross-arch).
+        use gtk4::glib::object::Cast;
         if bold != 0 {
-            push(pango::AttrInt::new_weight(pango::Weight::Bold));
+            push(pango::AttrInt::new_weight(pango::Weight::Bold).upcast());
         }
         if italic != 0 {
-            push(pango::AttrInt::new_style(pango::Style::Italic));
+            push(pango::AttrInt::new_style(pango::Style::Italic).upcast());
         }
         if underline != 0 {
-            push(pango::AttrInt::new_underline(pango::Underline::Single));
+            push(pango::AttrInt::new_underline(pango::Underline::Single).upcast());
         }
         if font_size > 0.0 {
-            push(pango::AttrSize::new(
-                (font_size * pango::SCALE as f64) as i32,
-            ));
+            push(pango::AttrSize::new((font_size * pango::SCALE as f64) as i32).upcast());
         }
         if a > 0.0 {
             let to16 = |v: f64| (v.clamp(0.0, 1.0) * 65535.0) as u16;
-            push(pango::AttrColor::new_foreground(to16(r), to16(g), to16(b)));
+            push(pango::AttrColor::new_foreground(to16(r), to16(g), to16(b)).upcast());
         }
 
         label.set_text(&buf.text);