🧹 [cli] Implement fix flag for lint command

cli/src/commands/lint.rs

@@ -2,6 +2,7 @@
 //!
 //! Performs static analysis linting on TechScript sources.
 
+use crate::commands::migrate::migrate_source;
 use crate::exit_code::ExitCode;
 use std::path::{Path, PathBuf};
 
@@ -43,6 +44,7 @@ pub fn execute(path_str: Option<&str>, fix: bool) -> ExitCode {
 
     let linter = techscript_linter::Linter::new();
     let mut violation_count = 0;
+    let mut fixed_count = 0;
 
     for file in files_to_lint {
         if let Ok(content) = std::fs::read_to_string(&file) {
@@ -66,9 +68,26 @@ pub fn execute(path_str: Option<&str>, fix: bool) -> ExitCode {
                     }
                 }
             }
+
+            // Fix deprecation warnings
+            if fix {
+                let migrated = migrate_source(&content);
+                if migrated != content {
+                    if let Err(e) = std::fs::write(&file, migrated) {
+                        eprintln!("Error writing fixed file {:?}: {}", file, e);
+                    } else {
+                        println!("Fixed deprecated keywords in: {:?}", file);
+                        fixed_count += 1;
+                    }
+                }
+            }
         }
     }
 
+    if fix && fixed_count > 0 {
+        println!("Fixed deprecation warnings in {} file(s).", fixed_count);
+    }
+
     if violation_count > 0 {
         println!("Linting found {} violation(s).", violation_count);
         ExitCode::LintFailure

cli/src/commands/migrate.rs

@@ -66,7 +66,7 @@ pub fn execute(path_str: Option<&str>) -> ExitCode {
     ExitCode::Success
 }
 
-fn migrate_source(source: &str) -> String {
+pub fn migrate_source(source: &str) -> String {
     let mut reporter = techscript_errors::DiagnosticReporter::new();
     let tokens = techscript_lexer::lex_recovered(source, &mut reporter);
     let _program = techscript_parser::parse_recovered(&tokens, &mut reporter);