feat: resize grip indicator on settings window (v2.03.11)

Draws a classic dotted SE-corner grip overlaid on the bottom-right of the
notebook so users know the settings dialog is resizable.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

linux/CHANGELOG.md

@@ -9,6 +9,12 @@ The version is defined in [`blitztext/__init__.py`](blitztext/__init__.py).
 
 ## [Unreleased]
 
+## [2.03.11] - 2026-06-09
+
+### Added
+- **Resize grip indicator.** A dotted SE-corner grip is drawn over the
+  bottom-right of the settings window so users discover it is resizable.
+
 ## [2.03.10] - 2026-06-09
 
 ### Fixed

linux/blitztext/__init__.py

@@ -6,4 +6,4 @@ counterpart to the macOS Blitztext menu bar app: it runs natively on the host
 (not in a container) so it can type into any application via xdotool.
 """
 
-__version__ = "2.03.10"
+__version__ = "2.03.11"

linux/blitztext/gtksettings.py

@@ -787,7 +787,20 @@ notebook.bt-nb tab:checked label {
 
         nb = Gtk.Notebook()
         nb.get_style_context().add_class("bt-nb")
-        self.dlg.get_content_area().pack_start(nb, True, True, 0)
+
+        # Resize-grip overlay — draws the classic dotted SE grip so users know
+        # the window is resizable.
+        _overlay = Gtk.Overlay()
+        _overlay.add(nb)
+        _grip = Gtk.DrawingArea()
+        _grip.set_size_request(18, 18)
+        _grip.set_halign(Gtk.Align.END)
+        _grip.set_valign(Gtk.Align.END)
+        _grip.set_can_focus(False)
+        _grip.connect("draw", self._draw_resize_grip)
+        _overlay.add_overlay(_grip)
+        _overlay.set_overlay_pass_through(_grip, True)
+        self.dlg.get_content_area().pack_start(_overlay, True, True, 0)
         # Build each tab lazily on first view so the dialog opens instantly. The
         # heavy bits are the Gtk.FileChooserButton pickers in Input/Benchmark
         # (~0.2s each to construct); deferring them until you visit that tab keeps
@@ -2531,6 +2544,21 @@ notebook.bt-nb tab:checked label {
         cb = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
         cb.set_text("\n".join(logbuffer.lines(self._log_min_level())), -1)
 
+    def _draw_resize_grip(self, _da, cr) -> None:
+        """Draw a 3×3 dotted SE resize-grip in the DrawingArea."""
+        import math
+        w = _da.get_allocated_width()
+        h = _da.get_allocated_height()
+        cr.set_source_rgba(0.55, 0.55, 0.55, 0.65)
+        spacing, radius = 5, 1.5
+        for row in range(3):
+            for col in range(3):
+                if row + col >= 2:   # lower-right triangle only
+                    cx = w - 3 + (col - 2) * spacing
+                    cy = h - 3 + (row - 2) * spacing
+                    cr.arc(cx, cy, radius, 0, 2 * math.pi)
+                    cr.fill()
+
     def _cleanup(self) -> None:
         self._stop_meter()
         t = getattr(self, "_log_timer", 0)