🚧 Add file time information in commit message

src/git_auto_tracker/commits/message_builder.py

@@ -19,21 +19,30 @@ _SUMMARY_LABELS = (
 
 
 def _format_ts(moment: dt.datetime | None) -> str:
+    """Render an aware datetime in local time with an explicit offset.
+
+    Local wall-clock time plus the UTC offset, e.g. 2026-09-12 08:00:00+02:00
+    (matching the log timestamp style in logging/setup.py, which also uses
+    local time rather than UTC).
+    """
     if moment is None:
         return ""
-    return moment.strftime("%Y-%m-%d %H:%M:%S%z")
+    return moment.astimezone().isoformat(sep=" ", timespec="seconds")
 
 
 def _author_lines(record) -> list[str]:  # noqa: ANN001 - ChangeRecord, avoid cycle
     lines: list[str] = []
     author = record.author
-    if author is not None:
-        lines.append(f"    Last modified by: {author.identifier}")
-        ts = _format_ts(author.timestamp)
-        if ts:
-            lines.append(f"    Modified at: {ts}")
-    else:
-        lines.append("    Last modified by: UNKNOWN")
+    identifier = author.identifier if author is not None else "UNKNOWN"
+    lines.append(f"    Last modified by: {identifier}")
+    # Filesystem last-modified time (Section 12: file_timestamp); rendered
+    # in local time like the log timestamps. Resolver-provided timestamps
+    # (author.timestamp) stay authoritative and are shown as well.
+    file_ts = _format_ts(record.file_timestamp)
+    if file_ts:
+        lines.append(f"    Modified at: {file_ts}")
+    if author is not None and author.timestamp is not None:
+        lines.append(f"    Changed at: {_format_ts(author.timestamp)}")
     return lines