Refresh the public catalog to match the live BOS desktop

Desktop / BOS lists ISO and core apps including breadhelp; bos-settings
is Tauri 2 + Svelte, not GTK4. breadcast is a bakery-only extra in Misc.
Tokens follow the fixed #0c0c0c / #1a1a1a base instead of Catppuccin mocha.

The site is curated; bakery SoT remains bread-ecosystem/registry/bread-ecosystem.toml.

data/projects.toml

@@ -1,5 +1,5 @@
 [[category]]
-name = "Bread Desktop Ecosystem"
+name = "Desktop / BOS"
 
 [[category.project]]
 name = "bos"
@@ -14,10 +14,18 @@ flagship = true
 name = "bos-settings"
 role = "settings app"
 lang = "rust"
-description = "GTK4 system settings app for BOS — configures every bread app plus core system settings."
-tags = ["GTK4"]
+description = "System settings for BOS — Tauri 2 + Svelte app that configures every bread app plus core system settings."
+tags = ["Tauri 2", "Svelte"]
 source = "https://git.breadway.dev/Breadway/bos-settings"
 
+[[category.project]]
+name = "breadhelp"
+role = "onboarding"
+lang = "rust"
+description = "Onboarding and help center for BOS — searchable guides, keybind viewer, troubleshooting wizard, and a live tour of the desktop apps. Bakery-distributed and shipped on the ISO."
+tags = ["GTK4"]
+source = "https://git.breadway.dev/Breadway/breadhelp"
+
 [[category.project]]
 name = "bread"
 role = "daemon"
@@ -146,6 +154,14 @@ source = "https://github.com/Breadway/vial-qmk"
 [[category]]
 name = "Misc & Utilities"
 
+[[category.project]]
+name = "breadcast"
+role = "screen cast"
+lang = "rust"
+description = "Screen cast to Chromecast/Google TV or DLNA — bakery product, not shipped on BOS."
+tags = ["GTK4"]
+source = "https://git.breadway.dev/Breadway/breadcast"
+
 [[category.project]]
 name = "mathspace-dark-mode"
 role = "extension"