fix: v0.10.2 drag-select stays highlighted and copies

A left drag in the pane is turned into xterm's own selection (as Shift+drag
does) instead of tmux copy-mode, which dropped the highlight on release.
Copy on release with a toast; Ctrl+C copies when something is selected.
Wheel scroll and status-line clicks still reach tmux. Closes #51

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WHRLCCdXYm41Qx5kNhehaP

debian/changelog

@@ -1,3 +1,13 @@
+devdesk (0.10.2) bookworm; urgency=medium
+
+  * Selecting text in the terminal works like a normal terminal (#51). A
+    drag is a browser selection that stays highlighted and is copied when
+    you let go, with a short toast. Ctrl+C copies the selection and
+    interrupts only when nothing is selected. The wheel still scrolls tmux
+    history, and the tmux status line still takes clicks.
+
+ -- Jared Vititoe <jjvititoe1@gmail.com>  Mon, 12 Oct 2026 16:36:00 -0400
+
 devdesk (0.10.1) bookworm; urgency=medium
 
   * Everything in 0.10.0, which was never published: its CI test for the