chore: bump version to 0.19.0

One feat commit since v0.18.0 (78be6c8, sum over every integer width) → minor bump.
50 commits since the tag: 21 fix, 14 test, 8 docs, 2 style, 2 refactor, 2 chore, 1 feat;
no breaking changes. No extension-facing changes — the CHANGELOG entry says so.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G7JYB3Yguom773bhAACicS

Author: antonsynd

Directory.Build.props

@@ -3,7 +3,7 @@
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
     <!-- Sharpy toolchain version (single version for Compiler + Core + CLI + LSP) -->
-    <SharpyVersion>0.18.0</SharpyVersion>
+    <SharpyVersion>0.19.0</SharpyVersion>
     <Version>$(SharpyVersion)</Version>
     <AssemblyVersion>$(SharpyVersion).0</AssemblyVersion>
     <FileVersion>$(SharpyVersion).0</FileVersion>

editors/vscode/CHANGELOG.md

@@ -7,6 +7,10 @@ with `SharpyVersion`), so several releases below contain no extension-facing cha
 
 ## [Unreleased]
 
+## [0.19.0] - 2026-09-05
+
+No extension-facing changes; version bumped with the toolchain.
+
 ## [0.18.0] - 2026-09-04
 
 ### Changed

editors/vscode/package.json

@@ -2,7 +2,7 @@
   "name": "sharpy-lang",
   "displayName": "Sharpy",
   "description": "Sharpy language support — diagnostics, hover, go-to-definition, and syntax highlighting",
-  "version": "0.18.0",
+  "version": "0.19.0",
   "publisher": "antonsynd",
   "license": "MIT OR Apache-2.0",
   "engines": {