Phase 1a: delete dead parallel app stack (~4,600 lines)

app.py was an abandoned skeleton (15 'pass # TODO' handlers, loads a
deleted .qss); everything else was reachable only from it:
ui_mainwindow.py (pyuic6 artifact), sc3-new.ui, motion_worker.py,
genesis_worker.py, coherent_hops_laser.py (stubs), scanning/ (dead C#
port + unused plan generator), config.json, plus helios_diagnostic.py
(sends wrong protocol commands) and helios_terminal.py (worse duplicate
of helios_test_app's Terminal tab).

hardware/__init__.py no longer wildcard-imports every driver, so the
stage driver imports without the uEye camera SDK installed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

hardware/__init__.py

@@ -1,7 +1,6 @@
-"""Hardware driver modules for ScanEngine-3"""
-from .pybbd202 import ThorlabsServoDriver, TriggerBitsServo, AXIS_X, AXIS_Y, CONTROLLER
-from .t3r_driver import T3RDriver
-from .uc480_camera import *
-from .tektronix_base import *
-from .coherent_hops_laser import *
-from .genesis_core import *
+"""Hardware driver modules for ScanEngine-3.
+
+Import drivers by module (e.g. ``from hardware.t3r_driver import T3RDriver``);
+nothing is re-exported here so that importing one driver never drags in
+another driver's SDK (the uEye camera stack in particular).
+"""

hardware/coherent_hops_laser.py

@@ -1,45 +0,0 @@
-"""
-Coherent HOPS Laser Driver - Stub Module
-This is a temporary stub to allow testing camera integration.
-"""
-
-
-class CoherentHOPSLaser:
-    """Stub class for Coherent HOPS Laser"""
-    pass
-
-
-class DummyLaser:
-    """Dummy laser for testing without hardware"""
-
-    def connect(self):
-        """Simulate connection"""
-        pass
-
-    def disconnect(self):
-        """Simulate disconnection"""
-        pass
-
-    def get_hardware_id(self):
-        """Return simulated hardware ID"""
-        return "SIM-12345"
-
-    def get_laser_model(self):
-        """Return simulated model"""
-        return "Genesis Simulator"
-
-    def get_interlock_status(self):
-        """Return simulated interlock status"""
-        return "OK"
-
-    def get_key_switch_status(self):
-        """Return simulated key switch status"""
-        return "ON"
-
-    def get_temperature_main(self):
-        """Return simulated main temperature"""
-        return 25.5
-
-    def get_temperature_eta(self):
-        """Return simulated ETA temperature"""
-        return 26.3