refactor(cli_display): replace boxed panels with a minimal log

- Introduce ok()/warn()/err()/info() as the four output primitives,
  replacing all rich.Panel/rich.Table usage.
- Merge the old 'Scanned N files' + 'Packed N files' steps into one
  print_scan_and_pack() line.
- Drop the contextzip vX.X.X / project-path banner from every command.
- Full file listings and exclusion breakdowns move to the report file
  (report.py) and behind -v/--verbose; the terminal shows one line
  per step.
- Add print_auto_cleanup() and print_redaction_summary() for the two
  newer background steps (workspace cleanup, secret redaction).

contextzip/cli_display.py

@@ -370,11 +370,36 @@ def print_apply_result(result, *, con: Console = console) -> None:
     ok("Archived zip to", str(result.applied_zip_path), con=con)
 
 
+# ---------------------------------------------------------------------------
+# Cleanup
+# ---------------------------------------------------------------------------
+
+
+def print_auto_cleanup(result, *, con: Console = console) -> None:
+    """
+    One quiet, dim line after an automatic cleanup pass — only shown when
+    something was actually removed, so a workspace with nothing stale
+    produces zero extra output. Failures (rare — a locked file, etc.) get
+    a short warning; they never interrupt or roll back the command that
+    was actually run.
+    """
+    if result.removed:
+        console_line = f"[dim]🧹 Auto-cleaned {len(result.removed)} old file(s) from .contextzip/ · freed {human_size(result.freed_bytes)}[/]"
+        con.print(console_line)
+
+    if result.failed:
+        n = len(result.failed)
+        warn(f"{n} old file{'s' if n != 1 else ''} in .contextzip/ couldn't be auto-cleaned", con=con)
+        for path, reason in result.failed[:5]:
+            con.print(f"  [yellow]![/] {path}  [dim]{reason}[/]")
+
+
 # ---------------------------------------------------------------------------
 # Utility
 # ---------------------------------------------------------------------------
 
 
+
 def human_size(n: int) -> str:
     """Format *n* bytes as a human-readable string (B / KB / MB / GB / TB)."""
     for unit in ("B", "KB", "MB", "GB"):