chore(release): 2.0.3 -- pop-out context menu, screenshot mode

Three fixes, all of them things that simply did not work: the context menu
in pop-out windows, the screenshot mode toggle, and text the game colours
without an alpha byte.

The 1.5.6 changelog block moves out of the plugin manifest to stay inside
the four-subblock limit; it remains in docs/CHANGELOG.md.

docs/CHANGELOG.md

@@ -11,6 +11,26 @@ releases as an overview and links to the release pages for details.
 
 ---
 
+## [2.0.3] — 2026-08-20
+
+### Fixed
+
+- The context menu never opened in a pop-out window. Right-clicking a name or an
+  item there did nothing at all. One payload handler is shared by the main
+  window, every pop-out and the input preview, and it carries a single popup
+  state. The main window draws first, found no open popup in its own scope, read
+  that as closed and cleared the state before the pop-out had drawn. A popup now
+  belongs to the surface that opened it and the others leave it alone.
+- Screenshot mode could not be turned off. The setting is persisted, but neither
+  of its two toggles saved the config, so turning it on only stuck when an
+  unrelated save happened to follow — and once stored, turning it off never
+  reached the file, so it returned at every plugin load. Both toggles save now;
+  an install currently stuck on it needs one click.
+- Text the game colours itself could render invisible. Some of those colours
+  arrive without an alpha byte, and the byte order swap left them fully
+  transparent. A colour that carries no value at all still resolves to the
+  colour already in effect rather than to opaque black.
+
 ## [2.0.2] — 2026-08-19
 
 ### Removed