- Add thread-safe SessionStore backed by SQLite (check_same_thread=False,
  threading.Lock protection, finally: conn.close())
- Replace deprecated datetime.utcnow() with datetime.now(timezone.utc)
- Add SessionTabBar Textual widget with per-session state indicators
  (⌛ working, > awaiting_input, none for idle) and active-session bracketing
- Export SessionTabBar in widgets __init__.py
- Update CHANGELOG.md under [Unreleased] / Added
- Update CONTRIBUTORS.md with contribution entry + fix stale <<* typo
- Add 8 BDD scenarios (features/tui_session_persistence_tabs.feature)

ISSUES CLOSED: #10593

@@ -0,0 +186,4 @@
+@then('the tab bar should show "\u231b" for the working session')
+def step_tab_bar_working_indicator(context: Any) -> None:
+    """Verify the hourglass indicator appears on a working session."""
+    content = str(getattr(context.tab_bar, "renderable", context.tab_bar._text))  # type: ignore[attr-defined]

@@ -0,0 +233,4 @@
+            )
+            try:
+                conn.execute(
+                    "UPDATE sessions SET state = ?, updated_at = ? WHERE session_id = ?",

@@ -0,0 +21,4 @@
+
+            def __init__(self, *args: Any, **kwargs: Any) -> None:
+                """Initialize the fallback widget."""
+                self._text = ""  # type: ignore[attr-defined]

@@ -0,0 +131,4 @@
+        if state == "working":
+            return "\u231b"  # ⌛ hourglass
+        elif state == "awaiting_input":
+            return ">"

@@ -0,0 +186,4 @@
+@then('the tab bar should show "\u231b" for the working session')
+def step_tab_bar_working_indicator(context: Any) -> None:
+    """Verify the hourglass indicator appears on a working session."""
+    content = str(getattr(context.tab_bar, "renderable", context.tab_bar._text))  # type: ignore[attr-defined]

@@ -0,0 +21,4 @@
+
+            def __init__(self, *args: Any, **kwargs: Any) -> None:
+                """Initialize the fallback widget."""
+                self._text = ""  # type: ignore[attr-defined]

@@ -0,0 +131,4 @@
+        if state == "working":
+            return "\u231b"  # ⌛ hourglass
+        elif state == "awaiting_input":
+            return ">"

@@ -0,0 +30,4 @@
+
+# ---------------------------------------------------------------------------
+# Session CRUD steps
+# ---------------------------------------------------------------------------

@@ -0,0 +186,4 @@
+@then('the tab bar should show "\u231b" for the working session')
+def step_tab_bar_working_indicator(context: Any) -> None:
+    """Verify the hourglass indicator appears on a working session."""
+    content = str(getattr(context.tab_bar, "renderable", context.tab_bar._text))  # type: ignore[attr-defined]

@@ -0,0 +195,4 @@
+@then('the tab bar should show ">" for the awaiting_input session')
+def step_tab_bar_awaiting_indicator(context: Any) -> None:
+    """Verify the prompt-arrow indicator appears on an awaiting-input session."""
+    content = str(getattr(context.tab_bar, "renderable", context.tab_bar._text))  # type: ignore[attr-defined]

@@ -0,0 +212,4 @@
+@then('the tab bar should mark "{name}" as active with brackets')
+def step_tab_bar_active_marked(context: Any, name: str) -> None:
+    """Verify the designated session is wrapped in square brackets."""
+    content = str(getattr(context.tab_bar, "renderable", context.tab_bar._text))  # type: ignore[attr-defined]

@@ -0,0 +21,4 @@
+
+            def __init__(self, *args: Any, **kwargs: Any) -> None:
+                """Initialize the fallback widget."""
+                self._text = ""  # type: ignore[attr-defined]

@@ -0,0 +131,4 @@
+        if state == "working":
+            return "\u231b"  # ⌛ hourglass
+        elif state == "awaiting_input":
+            return ">"

@@ -0,0 +4,4 @@
+
+import tempfile
+from pathlib import Path
+from typing import Any, Optional

@@ -0,0 +35,4 @@
+    return _FallbackStatic
+
+
+class SessionTabBar(_load_static_base()):  # type: ignore[misc]

@@ -0,0 +74,4 @@
+            classes: CSS classes applied to this widget.
+        """
+        base_cls = _load_static_base()
+        base_cls.__init__(self, id=id or "", classes=classes or "")

@@ -0,0 +35,4 @@
+    return _FallbackStatic
+
+
+class SessionTabBar(_load_static_base()):  # type: ignore[misc]

@@ -0,0 +62,4 @@
+    }
+    """
+
+    _CallbackDict = dict[str, Callable[..., Any]]

@@ -0,0 +5,4 @@
+import tempfile
+from pathlib import Path
+from typing import Any, Optional
+

@@ -0,0 +36,4 @@
+
+
+class SessionTabBar(_load_static_base()):  # type: ignore[misc]
+    """Widget displaying session tabs with state indicators.

@@ -0,0 +82,4 @@
+
+    def set_on_navigation(self, callbacks: _CallbackDict) -> None:
+        """Register navigation action callbacks.
+

@@ -0,0 +4,4 @@
+
+import tempfile
+from pathlib import Path
+from typing import Any, Optional

@@ -0,0 +35,4 @@
+    return _FallbackStatic
+
+
+class SessionTabBar(_load_static_base()):  # type: ignore[misc]

@@ -0,0 +76,4 @@
+        base_cls = _load_static_base()
+        safe_id = id if id is not None else ""
+        safe_classes = classes if classes is not None else ""
+        base_cls.__init__(self, id=safe_id, classes=safe_classes)