sar3d: GPU port of the notebook with four views

The sar3d processor is rewritten as a checked port of Multi_antenna_3D_clean_v1.ipynb:
NVRTC kernels, timing from the trace stamps, notebook parameter names and one cubic
SAR_VOXEL_M. It adds front, side, top and 3D views, drops gpr_cpp and the parity tools,
and the GUI speed now applies only while the socket speed is ignored.

python_app/models/gui_profile_schema.py

@@ -127,45 +127,25 @@ class GuiLegacyGprStateModel:
 class GuiSar3dStateModel:
     """UI-only defaults for the 3D SAR (sar3d) live settings.
 
-    The band, depth gate, antenna selection and motion knobs mirror the shared
-    gpr_* live-config fields; the sar3d_* knobs mirror the reference notebook
-    (Multi_antenna_3D_clean_v1.ipynb) defaults used by the C++ sar3d processor.
+    Values are the reference notebook's (Multi_antenna_3D_clean_v1.ipynb), whose
+    names the GUI shows: INPUT_IDX, F_START, MIN_DEPTH, LOOK_ANGLE_DEG, ...
     """
 
     input_positions: str = ""
     output_positions: str = ""
-    min_depth_m: float = 2.5
+    min_depth_m: float = 2.0
     max_depth_m: float = 8.0
-    start_freq_mhz: float = 2000.0
+    start_freq_mhz: float = 1500.0
     stop_freq_mhz: float = 6000.0
     speed_m_s: float = 0.0
     ignore_socket_speed_enabled: bool = False
-    look_angle_deg: float = 17.5
-    direction_sign: float = 1.0
-    apply_freq_phase_correction: bool = True
+    look_angle_deg: float = 19.5
     frame_radius: int = 0
-    edge_frame_weight: float = 0.8
-    pitch_override_enabled: bool = False
-    pitch_deg: float = 17.5
-    ground_depth_m: float = 1.25
-    x_min_m: float = -2.0
-    x_max_m: float = 2.0
-    y_min_m: float = -0.5
-    y_max_m: float = 2.0
-    z_min_m: float = 0.0
-    z_max_m: float = 8.0
-    voxel_x_m: float = 0.025
-    voxel_y_m: float = 0.02
-    voxel_z_m: float = 0.02
-    norm_edge_margin_m: float = 0.3
-    smooth_sigma: float = 1.5
+    voxel_m: float = 0.02
+    bp_ground_depth_m: float = 1.25
     comp_range_power: float = 0.3
-    tx_per_segment: int = 2
     use_compensation: bool = True
-    normalize_pairs: bool = True
-    # Bottom-view projection angle around the vertical Y axis, degrees:
-    # 0 = front view (X-Y), 90 = side view (Z-Y).
-    bottom_view_deg: float = 0.0
+    normalize_each_frame: bool = True
 
 
 @dataclass(slots=True)