chore(desktop): release the window chrome and update fixes as a minor

All three changes are desktop-only — the Windows title bar, the update
prompt, and the internal-testing tag are gated on the desktop shell — so the
entries name the desktop package, not the CLI, whose users cannot perceive
any of them.

Author: elkaix

.changeset/drop-internal-build-tag.md

@@ -1,5 +1,5 @@
 ---
-"@pymodel/pythinker-code": patch
+"@pymodel/pythinker-desktop": patch
 ---
 
-Remove the "Internal testing only" tag from the desktop app.
+Remove the "Internal testing only" tag.

.changeset/update-prompt-states.md

@@ -1,5 +1,5 @@
 ---
-"@pymodel/pythinker-code": patch
+"@pymodel/pythinker-desktop": minor
 ---
 
-Tell the desktop app when a new version is found, while it downloads, and when the download fails, instead of only once it is ready to install.
+Say when a new version is found, while it downloads, and when a download fails, instead of only once it is ready to install.

.changeset/windows-title-bar.md

@@ -1,5 +1,5 @@
 ---
-"@pymodel/pythinker-code": patch
+"@pymodel/pythinker-desktop": minor
 ---
 
-Give the Windows desktop window its own title bar, so the window controls no longer sit on top of the conversation header and the window can be dragged again.
+Give the Windows window its own title bar, so the window controls no longer sit on top of the conversation header and the window can be dragged again.