[camera_web] Upgrade package:web to ^1.0.0 and remove pkg_web_tweaks.dart

[mdebbar]

Upgrading package:web dependency constraint to ^1.0.0 in camera_web allows removing the temporary bridge file pkg_web_tweaks.dart and using native WebIDL bindings directly.

Part of flutter/flutter#190355.
Related to PR #12384.

[flutter-dashboard]

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[gemini-code-assist]

Code Review

This pull request bumps the minimum package:web dependency to 1.0.0 and removes the local pkg_web_tweaks.dart helper file, updating the codebase to use standard APIs directly. The review feedback highlights several potential runtime errors (such as TypeError and NoSuchMethodError) that could occur on browsers where properties like torch, zoom, or facingMode are undefined. To prevent these crashes, the reviewer recommends using jsUtil.hasProperty to safely verify the existence of these properties before accessing them.

[gemini-code-assist]

On browsers that do not support the torch constraint (such as Firefox or Safari), supportedConstraints.torch will be undefined at runtime. In Dart's JS interop, accessing an undefined property declared as a non-nullable bool will throw a TypeError because null is not a subtype of bool. Use _cameraService.jsUtil.hasProperty to safely check if the property exists before accessing it.

Suggested change

	final bool torchModeSupported = supportedConstraints.torch;
	final bool torchModeSupported = _cameraService.jsUtil.hasProperty(supportedConstraints, 'torch'.toJS) &&
	supportedConstraints.torch;

[gemini-code-assist]

If the camera or browser does not support torch capabilities, defaultVideoTrack.getCapabilities().torch will be undefined (which evaluates to null in Dart). Calling .toDart on it will throw a runtime error. Use _cameraService.jsUtil.hasProperty to safely check if the torch capability exists first.

      final web.MediaTrackCapabilities capabilities = defaultVideoTrack.getCapabilities();
      final bool canEnableTorchMode = _cameraService.jsUtil.hasProperty(capabilities, 'torch'.toJS) &&
          capabilities.torch.toDart.isNotEmpty &&
          capabilities.torch.toDart.first.toDart;

[gemini-code-assist]

If facingMode is not supported or returned in the video track settings (common on desktop browsers), defaultVideoTrackSettings.facingMode will be undefined (which evaluates to null in Dart). Calling .isNotEmpty on it will throw a NoSuchMethodError. Use _cameraService.jsUtil.hasProperty to safely check if the property exists and handle it as nullable.

Suggested change

	final String facingMode = defaultVideoTrackSettings.facingMode;
	if (facingMode != null && facingMode.isNotEmpty) {
	if (facingMode.isNotEmpty) {
	final String? facingMode = _cameraService.jsUtil.hasProperty(defaultVideoTrackSettings, 'facingMode'.toJS)
	? defaultVideoTrackSettings.facingMode
	: null;
	if (facingMode != null && facingMode.isNotEmpty) {

[gemini-code-assist]

On browsers that do not support the zoom constraint (such as Firefox or Safari), supportedConstraints.zoom will be undefined at runtime. Accessing it directly as a non-nullable bool will throw a TypeError. Use jsUtil.hasProperty to safely check if the property exists first.

Suggested change

	final bool zoomLevelSupported = supportedConstraints.zoom;
	final bool zoomLevelSupported = jsUtil.hasProperty(supportedConstraints, 'zoom'.toJS) &&
	supportedConstraints.zoom;

[gemini-code-assist]

If the camera or browser does not support zoom capabilities, defaultVideoTrack.getCapabilities().zoom will be undefined (which evaluates to null in Dart). Accessing its properties or returning it directly will cause a runtime crash. Use jsUtil.hasProperty to check if the capability exists, and throw the appropriate CameraWebException if it does not.

      final web.MediaTrackCapabilities capabilities = defaultVideoTrack.getCapabilities();
      if (!jsUtil.hasProperty(capabilities, 'zoom'.toJS)) {
        throw CameraWebException(
          camera.textureId,
          CameraErrorCode.zoomLevelNotSupported,
          'The zoom level is not supported by the current camera.',
        );
      }
      final web.MediaSettingsRange zoomLevelCapability = capabilities.zoom;

      return ZoomLevelCapability(
        minimum: zoomLevelCapability.min,
        maximum: zoomLevelCapability.max,
        videoTrack: defaultVideoTrack,
      );

[gemini-code-assist]

If facingMode is not supported or returned in the video track settings, videoTrackSettings.facingMode will be undefined (which evaluates to null in Dart). Calling .isEmpty on it will throw a NoSuchMethodError. Use jsUtil.hasProperty to safely check if the property exists and handle it as nullable.

Suggested change

	final String facingMode = videoTrackSettings.facingMode;
	if (facingMode == null || facingMode.isEmpty) {
	if (facingMode.isEmpty) {
	final String? facingMode = jsUtil.hasProperty(videoTrackSettings, 'facingMode'.toJS)
	? videoTrackSettings.facingMode
	: null;
	if (facingMode == null || facingMode.isEmpty) {