Delay expands duration of track

[nixonyh]

Stacks on top of #122

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: dd637dc4-0849-47ed-849c-4abef8514ac1

📥 Commits

Reviewing files that changed from the base of the PR and between 5a54af6 and 1a7e05a.

📒 Files selected for processing (1)

• crates/motiongfx/src/track.rs

🚧 Files skipped from review as they are similar to previous changes (1)

• crates/motiongfx/src/track.rs

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Updated delayed track behavior so fragment delays also widen the track’s duration to stay consistent with per-sequence shifting.
  • Prevented overlapping clips when chaining delayed fragments.
  • Kept final sequence end times aligned with the widened duration.
• Tests
  • Adjusted existing delay assertions and added a regression test to verify delayed fragments chain correctly without overlaps.

Walkthrough

TrackFragment::delay now widens fragment duration using saturating arithmetic. Tests verify the updated duration and ensure delayed fragments chain without overlapping sequences.

Changes

Track fragment timing

Layer / File(s)	Summary
Delay duration and chaining regression crates/motiongfx/src/track.rs	delay updates duration alongside sequence offsets, with tests covering the widened duration and non-overlapping chained output.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• voxell-tech/motiongfx#122: Updates delay-related track timing and duration behavior.

Poem

I nudged each clip along the track,
And widened time so none slip back.
The chains now flow with room to spare,
No overlapping clips hide there.
Squeak! The ending lands just right.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: delaying a track fragment now expands duration.
Description check	✅ Passed	The description is brief but still related to the change by noting it stacks on a dependent PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

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