fix: remove Internal engine section header in Engines tab (v2.03.14)

Device/Compute rows already only show for local engines; the titled section
break was redundant and visually separated fields that belong together.

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

linux/CHANGELOG.md

@@ -9,6 +9,13 @@ The version is defined in [`blitztext/__init__.py`](blitztext/__init__.py).
 
 ## [Unreleased]
 
+## [2.03.14] - 2026-06-10
+
+### Fixed
+- **Engines tab.** Removed the "Internal engine — device & precision" section
+  header. The Device and Compute type fields already only appear when a local
+  engine type is selected; the separate header was redundant.
+
 ## [2.03.13] - 2026-06-10
 
 ### Changed

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__ = "2.03.13"
+__version__ = "2.03.14"

linux/blitztext/gtksettings.py

@@ -1244,7 +1244,7 @@ notebook.bt-nb tab:checked label {
         self.stt_type.connect("changed", self._stt_type_changed)
 
         # ── Device & precision card (local engines only) ─────────────────────
-        self.stt_dev_card = _card_section(box, "Internal engine — device & precision", margin_top=4, icon="computer-symbolic")
+        self.stt_dev_card = _card_section(box, "", margin_top=4)
         self.stt_device  = _labeled(self.stt_dev_card, "Device", _type_combo(_DEVICE_OPTIONS, self.cfg.device),
                                     tooltip="Which processor runs the speech model. "
                                             "Auto tries your GPU first. GPU (CUDA) requires NVIDIA — much faster than CPU.")