release: cut 2.5.0 (arms the first automated release build on merge to main)

release.yml fires when pubspec.yaml's version changes on main and the v<version>
tag doesn't yet exist. Bump 2.4.1 -> 2.5.0 and move the Unreleased entries under
a dated 2.5.0 heading (per the changelog discipline: version + cut in one
commit), so merging windows-support to main triggers the first versioned
Linux + Windows release build and publishes the 2.5.0 notes.

Minor bump: the release is all additive — Windows desktop support, vim window /
workspace-tab commands, the Claude sidebar + TUI command work, tmux dropped as a
required tool, and the ClaudeConfig teardown-race fix.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -16,6 +16,8 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ## [Unreleased]
 
+## [2.5.0] — 2026-06-14
+
 ### Added
 
 - **Windows desktop support.** clide builds and runs on Windows: ConPTY-backed

pubspec.yaml

@@ -13,7 +13,7 @@ description: >-
   subsystem handlers (pane, files, editor, git, pql), and the
   extension framework.
 publish_to: none
-version: 2.4.1
+version: 2.5.0
 repository: https://github.com/postmeridiem/clide
 # Short user-facing tagline (the welcome subtitle, web meta
 # description, etc.). Baked into lib/src/build_info.g.dart by