Add visual TUI test coverage

Cargo.toml

@@ -8,6 +8,7 @@ license = "MIT"
 repository = "https://github.com/your-username/tele-tui"
 keywords = ["telegram", "tui", "terminal", "cli"]
 categories = ["command-line-utilities"]
+default-run = "tele-tui"
 
 [features]
 default = ["clipboard", "url-open", "notifications", "images"]
@@ -15,6 +16,7 @@ clipboard = ["dep:arboard"]
 url-open = ["dep:open"]
 notifications = ["dep:notify-rust"]
 images = ["dep:ratatui-image", "dep:image"]
+test-support = []
 
 [dependencies]
 ratatui = "0.29"
@@ -43,6 +45,12 @@ fs2 = "0.4"
 insta = "1.34"
 tokio-test = "0.4"
 criterion = "0.5"
+termwright = "0.2"
+
+[[bin]]
+name = "tele-tui-test-fixture"
+path = "src/bin/tele-tui-test-fixture.rs"
+required-features = ["test-support"]
 
 [[bench]]
 name = "group_messages"