feat(settings): add editable font search and refresh (#251)

The font pickers (editor, fallback, UI, terminal) become editable comboboxes: type to search installed families or enter any family name, and Refresh re-reads the system fonts. ide-fonts' cached family list is now refreshable (DirectWrite re-queries the system collection with checkForUpdates; CoreText and fontconfig are read anew), exposed through system_font_families(refresh). Before the first native result the pickers fall back to Canvas detection of common families; saved names and the last catalog are kept when a refresh fails. Fonts are enumerated on the local desktop in remote-development windows too.

Co-authored-by: bghtyu <[email protected]>

src-tauri/src/commands/fonts.rs

@@ -1,14 +1,15 @@
 //! Font families installed on this machine, for the font pickers in Settings.
+//! Enumerates fonts on the local desktop, including in remote-development windows.
 
 use ide_core::{IdeError, IdeResult};
 use ide_fonts::FontFamily;
 
-/// Every installed family, sorted, each flagged monospaced or not. Read once
-/// per run (off the command threads) and cached.
+/// Every installed family, sorted, each flagged monospaced or not. Read on
+/// first use (off the command threads), cached, and re-queried on `refresh`.
 #[tauri::command]
 #[specta::specta]
-pub async fn system_font_families() -> IdeResult<Vec<FontFamily>> {
-    tauri::async_runtime::spawn_blocking(|| ide_fonts::families().to_vec())
+pub async fn system_font_families(refresh: bool) -> IdeResult<Vec<FontFamily>> {
+    tauri::async_runtime::spawn_blocking(move || ide_fonts::families(refresh).to_vec())
         .await
         .map_err(|e| IdeError::internal(e.to_string()))
 }