feat(menu): show current version on the Check-for-Updates entry

Appends ' · v{CARGO_PKG_VERSION}' to every state of the version-action
menu item so users can see what they are running without opening an
About dialog. Reads as 'Check for updates · v0.1.7', 'Up to date ·
v0.1.7', etc. Winget channel decoration is preserved as a trailing
parenthetical.

Bumps version to 0.1.7.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "claude-code-usage-bubble"
-version = "0.1.6"
+version = "0.1.7"
 edition = "2021"
 license = "Apache-2.0"
 description = "Floating bubble showing Claude Code and Codex usage on Windows"