docs: update CHANGELOG.md and README.md for v0.19.0 [skip ci] (#261)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -1,5 +1,61 @@
 # Changelog
 
+
+## v0.19.0 (2026-04-04)
+
+### Features
+
+- captcha on email input
+- dns block lists
+- portable build
+
+### Bug Fixes
+
+- follow latest MCP spec
+- wayfern initial connection on macos doesn't timeout
+
+### Refactoring
+
+- linux auto updates
+- more robust vpn handling
+- don't allow portable build to be set as the default browser
+- show app version in settings
+
+### Documentation
+
+- remove codacy badge
+- agents
+- contrib-readme-action has updated readme
+- update CHANGELOG.md and README.md for v0.18.1 [skip ci]
+- cleanup
+
+### Maintenance
+
+- test: simplify
+- chore: preserve cargo
+- chore: version bump
+- chore: linting
+- chore: update dependencies
+- chore: repo publish workflow
+- chore: copy and backlink
+- test: serialize
+- chore: copy correct file
+- chore: linting
+- chore: do not provide possible cause
+- chore: linting
+- chore: linting
+- chore: linting
+- chore: linting
+- ci(deps): bump the github-actions group with 8 updates
+- chore: commit doc changes directly and pretty discord notifications
+- chore: update flake.nix for v0.18.1 [skip ci]
+- chore: fix linting and formatting
+
+### Other
+
+- deps(deps): bump the frontend-dependencies group with 35 updates
+- deps(rust)(deps): bump the rust-dependencies group
+
 ## v0.18.1 (2026-03-24)
 
 ### Refactoring