CSE Machine: Fix some UI & animations issues, and add tests

[CZX123]

Description

This PR fixes some UI & animations issues, and add some tests for the CSE machine's layout and animations.
Fixes #2921 fully by correctly calculating the width of the frame with a rune.
Also see: #2959.
Fixes #2716. The new result is shown below:

Changes

UI

• Improved environment frame positioning, spacing is now more consistent.
• Global frame default text of :::pre-declared names::: now should appear first, above all bindings
• Arrows from arrays now always exit the array first before pointing to their targets.
  • If the arrow comes from the first unit of the array to itself, it will now form a circular loop
    
• Changed height and width behavior for array and function values
  • _height and _width now only refer to the height and widths of the array boxes or closure circles only
  • ArrayValue now has a totalHeight and totalWidth property that stores the total height and width of nested values inside the array
  • FnValue and GlobalFnValue has a totalWidth property that also includes the tooltip width
• Double quotes are used for strings in the stash now.

Animations

• Fixed frame arrows not animating alongside the frame creation in FrameCreationAnimation
• Fixed the animation function inside BaseAnimationComponent, so that the example below has the correct expected behavior:

  a.animateTo({ x: 100 });
  a.animateTo({ x: 200 }, { delay: 1 });

Testing

• Add test cases for the CSE machine's layout for values
• Add test cases for the CSE machine's AnimationComponent

[coveralls]

Pull Request Test Coverage Report for Build 16860915421

Details

• 151 of 197 (76.65%) changed or added relevant lines in 17 files are covered.
• 12 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.2%) to 43.458%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/features/cseMachine/components/ControlItemComponent.tsx	1	2	50.0%
src/features/cseMachine/components/StashItemComponent.tsx	1	2	50.0%
src/features/cseMachine/components/Frame.tsx	39	43	90.7%
src/features/cseMachine/animationComponents/FrameCreationAnimation.tsx	1	8	12.5%
src/features/cseMachine/CseMachineLayout.tsx	12	28	42.86%
src/features/cseMachine/CseMachineAnimation.tsx	2	19	10.53%

Files with Coverage Reduction	New Missed Lines	%
src/features/cseMachine/animationComponents/FrameCreationAnimation.tsx	1	18.68%
src/features/cseMachine/CseMachineUtils.ts	1	71.65%
src/features/cseMachine/animationComponents/base/AnimationComponents.tsx	4	75.65%
src/features/cseMachine/components/arrows/ArrowFromText.tsx	6	81.82%

Totals
Change from base Build 16858234296:	0.2%
Covered Lines:	20627
Relevant Lines:	49670

---

💛 - Coveralls

[RichDom2185]

@sayomaki do you have time to review this? It's a pure FE change and the PR seems ready, I don't see a reason not to merge it if it's all good

[martin-henz]

Update: to be merged by 29/9/2025, to be ready for Unit 3 of CS1101S.

[RichDom2185]

Fixes #2959.

Still getting the issue with the sample program provided in the issue (+ other programs)

I'll remove this from the issues closed by this PR. But feel free to close if I'm mistaken.

Fixes #2716.

Can't test right now due to issues with immer but I'll take your word for it.

[RichDom2185]

LGTM, thanks! Just the above comment