Fix crashes in ensemble fracture statistics and camera zoom all

[magnesj]

Fix crash when width data is missing in ensemble fracture statistics

Problem: conductivity and width grids were built as separate lists; a missing width grid shortened one list and widthGrids[i] went out of range.
Fix: build grids per definition so they stay paired, and skip definitions missing either grid.

Crash stack (signature 642357244e71, 3 reports)

[3] cvf::cref<RigFractureGrid>::cref(cvf::cref<RigFractureGrid> const&) at cvfObject.inl:410
[4] RigEnsembleFractureStatisticsCalculator::calculateProperty(...) at RigEnsembleFractureStatisticsCalculator.cpp:156
[5] RimStimPlanFractureTemplate::generatePropertiesTable() const at RimStimPlanFractureTemplate.cpp:791
[6] RimStimPlanFractureTemplate::loadDataAndUpdate() at RimStimPlanFractureTemplate.cpp:221
[7] RicMeshFractureTemplateHelper<RimStimPlanFractureTemplate>::createNewTemplatesFromFiles(...) at RicMeshFractureTemplateHelper.inl:149
[8] RicMeshFractureTemplateHelper<RimStimPlanFractureTemplate>::createNewTemplates(...) at RicMeshFractureTemplateHelper.inl:89
[9] RicNewStimPlanFractureTemplateFeature::createNewTemplates() at RicNewStimPlanFractureTemplateFeature.cpp:58
[10] RicNewStimPlanFractureTemplateFeature::onActionTriggered(bool) at RicNewStimPlanFractureTemplateFeature.cpp:78

Fix crash in Camera::computeFitViewEyePosition with zero view direction

Problem: zoomAll() can pass a zero view direction; the up vector becomes zero and Plane::distanceToOrigin asserts. Regression of the parallel dir/up fix in #14849 (4 reports on 2026.09.2-dev.03).
Fix: fall back to the Y axis when the direction is zero or undefined.

Crash stack (signature c5301dc57661, 7 reports)

[5] cvf::AssertHandlerConsole::handleAssert(char const*, int, char const*, char const*) at cvfAssert.cpp:125
[6] cvf::Plane::distanceToOrigin() const at cvfPlane.cpp:313
[7] cvf::Camera::computeFitViewEyePosition(cvf::BoundingBox const&, cvf::Vector3<double> const&, cvf::Vector3<double> const&, double, double, double) at cvfCamera.cpp:361
[8] caf::Viewer::zoomAll() at cafViewer.cpp:992
[9] caf::CmdFeature::actionTriggered(bool) at cafCmdFeature.cpp:176

[kriben]

Reviewed all 4 changed files using open-code-review-delegate for file selection and rule resolution (100% coverage, no skipped files). Found two medium-severity gaps in the camera fix, detailed inline. All 4 camera tests passed against the PR's camera source linked with existing framework libraries; both additional cases below were reproduced separately. No actionable issue found in the fracture-grid pairing change. Full application build and fracture tests were not run.

[kriben]

[Medium][bug] Undefined directions bypass the fallback and still assert.

dirIn.length() > 0.0 does not reject cvf::Vec3d::UNDEFINED: its components use the maximum-double sentinel, so its length overflows to infinity and this condition evaluates true. Subsequent normalization produces degenerate vectors.

I reproduced an assertion in Plane::distanceToOrigin() by calling computeFitViewEyePosition() with Vec3d::UNDEFINED, a valid bounding box, and Vec3d::Z_AXIS as up. Please explicitly reject undefined/non-finite directions before selecting the fallback and add this input to the regression test.

[magnesj]

Fixed: undefined and non-finite directions now fall back to the Y axis. Test covers Vec3d::UNDEFINED.

[kriben]

[Medium][bug] Apply the direction fallback consistently in fitView().

This fallback is local to computeFitViewEyePosition(), but fitView() computes correctedUp beforehand using the original direction. For a zero direction, that up vector is zero. This helper now returns a valid eye position, but fitView() subsequently passes the zero up vector to setFromLookAt(), producing a singular camera matrix.

I reproduced this with fitView(bb, Vec3d::ZERO, Vec3d::Z_AXIS, 0.9) and a valid bounding box/viewport: the resulting direction, up, and right vectors all have length zero. Please sanitize the direction before deriving the up vector in fitView(), so eye calculation and final orientation use the same valid basis, and test the resulting camera basis rather than only the returned eye position.

[magnesj]

Fixed: fitView() sanitizes the direction before deriving the up vector. New test checks the resulting direction/up/right basis for zero and undefined directions.