IMAGEADJUST: Image Adjust dialog for raster images

IMAGEADJUST (alias IAD) takes the selected raster images or asks
"Select image(s):", then opens a dialog with a before/after preview of
the first image and brightness, contrast and fade rows (bar plus
stepper, whole numbers 0-100). Apply writes the values to every chosen
image as one undo step; restore defaults sets 50/50/0. Adds the
image_adjust automation action and the image-adjust locale group.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/alias.rs

@@ -80,7 +80,7 @@ const WEB_ALIAS_KEY: &str = "opencadstudio.aliases";
 /// migrated forward (see `introduced_at` / `migrate_aliases`). Version 1 shipped
 /// the pre-REDRAW table; version 2 introduced the REDRAW-family aliases; version 3
 /// introduced HB (HATCHTOBACK); version 4 introduced ER (EXTERNALREFERENCES).
-const DEFAULT_ALIASES_VERSION: u32 = 8;
+const DEFAULT_ALIASES_VERSION: u32 = 9;
 
 #[cfg(target_arch = "wasm32")]
 const WEB_ALIAS_VERSION_KEY: &str = "opencadstudio.aliases.version";
@@ -103,6 +103,7 @@ fn introduced_at(version: u32) -> &'static [(&'static str, &'static str)] {
         6 => &[("VV", "QLAYER")],
         7 => &[("DV", "DVIEW")],
         8 => &[("-XR", "-XREF"), ("XC", "XCLIP"), ("ICL", "IMAGECLIP")],
+        9 => &[("IAD", "IMAGEADJUST")],
         _ => &[],
     }
 }