[feat] enhance progress logging, introduce TTY-aware banners, and implement hardened SHA-256 verification for model downloads

src/main.rs

@@ -313,6 +313,11 @@ fn run() -> Result<()> {
     // Route subsequent INFO/WARN/DEBUG logs through the cliclack/indicatif area
     polyscribe::progress::set_global_progress_manager(&pm);
 
+    // Show a friendly intro banner (TTY-aware via cliclack). Ignore errors.
+    if !polyscribe::is_quiet() {
+        let _ = cliclack::intro("PolyScribe");
+    }
+
     // Determine formats
     let out_formats = if args.out_format.is_empty() {
         OutputFormats::all()
@@ -487,6 +492,15 @@ fn run() -> Result<()> {
         if had_error { polyscribe::elog!("One or more inputs failed"); }
     }
 
+    // Outro banner summarizing result; ignore errors.
+    if !polyscribe::is_quiet() {
+        if had_error {
+            let _ = cliclack::outro("Completed with errors. Some inputs failed.");
+        } else {
+            let _ = cliclack::outro("All done. Outputs written.");
+        }
+    }
+
     if had_error { std::process::exit(2); }
     let _elapsed = start_overall.elapsed();
     Ok(())