fix: resolve CI/CD issues - remove unused dependencies and imports

- Remove unused thiserror dependency from Cargo.toml
- Remove unused imports (Text, Tabs, Widget, Event, KeyCode, KeyEventKind) from tui/mod.rs
- Remove unused imports (File, Write) from export/mod.rs
- Remove unused pub use ComplexityDistribution from core/analyzer.rs

techdebt-tracker-cli/tests/parser_tests.rs

@@ -0,0 +1,113 @@
+use std::path::PathBuf;
+
+use techdebt_tracker_cli::core::language::{Language, LanguageParser};
+use techdebt_tracker_cli::models::{Config, PatternConfig, Priority};
+
+#[test]
+fn test_language_from_path_js() {
+    let path = PathBuf::from("test.js");
+    assert_eq!(Language::from_path(&path), Some(Language::JavaScript));
+}
+
+#[test]
+fn test_language_from_path_ts() {
+    let path = PathBuf::from("test.ts");
+    assert_eq!(Language::from_path(&path), Some(Language::TypeScript));
+}
+
+#[test]
+fn test_language_from_path_py() {
+    let path = PathBuf::from("test.py");
+    assert_eq!(Language::from_path(&path), Some(Language::Python));
+}
+
+#[test]
+fn test_language_from_path_rs() {
+    let path = PathBuf::from("test.rs");
+    assert_eq!(Language::from_path(&path), Some(Language::Rust));
+}
+
+#[test]
+fn test_language_from_path_unknown() {
+    let path = PathBuf::from("test.xyz");
+    assert_eq!(Language::from_path(&path), None);
+}
+
+#[test]
+fn test_language_single_line_comment() {
+    assert_eq!(Language::JavaScript.single_line_comment(), Some("//"));
+    assert_eq!(Language::Python.single_line_comment(), Some("#"));
+    assert_eq!(Language::Rust.single_line_comment(), Some("//"));
+    assert_eq!(Language::Unknown.single_line_comment(), None);
+}
+
+#[test]
+fn test_language_as_str() {
+    assert_eq!(Language::JavaScript.as_str(), "JavaScript");
+    assert_eq!(Language::Python.as_str(), "Python");
+    assert_eq!(Language::Rust.as_str(), "Rust");
+}
+
+#[test]
+fn test_javascript_comment_parsing() {
+    let content = r#"
+function test() {
+    // TODO: Implement this
+    return true;
+}
+"#;
+
+    let parser = LanguageParser::new(Language::JavaScript);
+    let patterns = vec![PatternConfig {
+        keyword: "TODO".to_string(),
+        priority: Priority::Medium,
+        regex: false,
+    }];
+
+    let items = parser.parse(content, &PathBuf::from("test.js"), &patterns).unwrap();
+
+    assert!(!items.is_empty());
+    assert!(items.iter().any(|i| i.keyword == "TODO"));
+}
+
+#[test]
+fn test_python_comment_parsing() {
+    let content = r#"
+def test():
+    # FIXME: This is broken
+    return True
+"#;
+
+    let parser = LanguageParser::new(Language::Python);
+    let patterns = vec![PatternConfig {
+        keyword: "FIXME".to_string(),
+        priority: Priority::Critical,
+        regex: false,
+    }];
+
+    let items = parser.parse(content, &PathBuf::from("test.py"), &patterns).unwrap();
+
+    assert!(!items.is_empty());
+    assert!(items.iter().any(|i| i.keyword == "FIXME"));
+}
+
+#[test]
+fn test_multiline_comment_parsing() {
+    let content = r#"
+/*
+ * TODO: Multi-line comment
+ * Need to fix this later
+ */
+"#;
+
+    let parser = LanguageParser::new(Language::JavaScript);
+    let patterns = vec![PatternConfig {
+        keyword: "TODO".to_string(),
+        priority: Priority::Medium,
+        regex: false,
+    }];
+
+    let items = parser.parse(content, &PathBuf::from("test.js"), &patterns).unwrap();
+
+    assert!(!items.is_empty());
+}