fix: LaserAFConfig defaults from _def.py & status bar height stability

[Alpaca233]

Summary

• LaserAFConfig defaults now reference _def.py constants instead of hardcoded values. Several defaults had diverged (e.g. spot_detection_mode was DUAL_RIGHT instead of DUAL_LEFT, correlation_threshold was 0.9 vs 0.7, focus_camera_exposure_time_ms was 0.2 vs 2.0).
• Status bar no longer grows taller when error messages contain newlines. Newlines are collapsed to spaces in the display text, and the message label has a fixed height.

Test plan

• All 182 config-related tests pass
• All 32 WarningErrorWidget tests pass
• Verify status bar stays single-line with multi-line error messages in the running app

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR aligns LaserAFConfig model defaults with the canonical laser autofocus constants in control/_def.py, and hardens the status bar warning/error widget so multi-line messages don’t increase the status bar height.

Changes:

• Update LaserAFConfig defaults to reference _def.py constants and extend tests to assert the defaults match _def.py.
• Prevent status bar height growth by collapsing newlines in displayed messages and constraining the message label height.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
software/control/models/laser_af_config.py	Swaps hardcoded Laser AF defaults for _def.py-driven defaults via default_factory.
software/tests/control/test_acquisition_config_models.py	Updates the LaserAFConfig default test to validate against _def.py constants.
software/control/widgets.py	Makes status bar message display single-line and height-stable when incoming log messages contain newlines.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

The field description says "Gaussian filter sigma (-1 to disable)", but _def.LASER_AF_FILTER_SIGMA is None and utils.find_spot_location() only applies filtering when filter_sigma is not None and filter_sigma > 0. Update the description (or the sentinel) so the docs match the actual disable behavior (e.g., "None or <= 0 to disable").

Suggested change

	default_factory=lambda: _def.LASER_AF_FILTER_SIGMA, description="Gaussian filter sigma (-1 to disable)"
	default_factory=lambda: _def.LASER_AF_FILTER_SIGMA,
	description="Gaussian filter sigma (None or <= 0 to disable)",

[Copilot]

Hard-coding setFixedHeight(20) can clip the message text when users run with larger fonts / DPI scaling (accessibility), since the widget height is now fixed regardless of font metrics. Consider computing the fixed height from QFontMetrics(self.label_text.font()).height() (plus margins) or tying it to self.label_icon.height() so the status bar stays single-line without truncating glyphs.

Suggested change

	self.label_text.setFixedHeight(20)
	# Compute height from font metrics and icon size to avoid clipping with larger fonts/DPI
	text_height = self.label_text.fontMetrics().height()
	icon_height = self.label_icon.sizeHint().height()
	self.label_text.setFixedHeight(max(text_height, icon_height))