fix: right-button double click no longer wipes rotation mid-drag (v1.7.2)

Two rotate drags started quickly at nearly the same spot were treated as a
double click: the reset was detected on button down against the previous down
time/position, so it wiped all effects and ignored the second drag, leaving
Ctrl+S to save an unrotated crop.

- Double click is now only counted for actual clicks (movement <= 4px) and is
  decided on button up; a drag breaks the chain.
- Pointer up is matched by pointer id, so a left-drag pan never counts as a click.
- dist: 1.7.2 .deb replaces the tracked 1.7.1 package.

CHANGELOG.md

@@ -4,6 +4,17 @@ All notable changes to imajViewer are documented in this file.
 
 ## [Unreleased]
 
+## [1.7.2] - 2026-10-25
+
+### Fixed
+- Rotating sometimes vanished before saving: the right-button double-click reset was
+  detected on button *down* against the previous down time and position, so two rotate
+  drags started quickly at nearly the same spot were treated as a double click — all
+  effects (rotation included) were wiped and the second drag was ignored, so `Ctrl+S`
+  saved an unrotated crop. A double click is now only counted for actual clicks
+  (movement ≤ 4 px, decided on button up), a drag breaks the chain, and
+  `pointer up` is matched by pointer id so a left-drag pan never counts as a click.
+
 ## [1.7.1] - 2026-10-25
 
 ### Added