fix(idex): refine parking space sanity check to detect and allow configurations where T1 homes against T0

[tg73]

Summary by CodeRabbit

• Bug Fixes
  • Improved dual-extruder start-up checks so the printer uses the correct parking-space boundary more consistently.
  • Made print setup values available earlier in the start sequence, reducing the chance of incorrect toolhead positioning checks.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

Plan: Pro

Run ID: 17d93982-b7a0-4afb-83da-7bb708c9b380

📥 Commits

Reviewing files that changed from the base of the PR and between 1df0f23 and 7a0be86.

📒 Files selected for processing (1)

• configuration/macros.cfg

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📝 Walkthrough

Walkthrough

The START_PRINT macro in configuration/macros.cfg now caches printable_x_max earlier so it is available for the IDEX toolhead x-offset sanity check. The dc_parking_space calculation is changed to conditionally select a boundary based on comparison with printable_x_max / 2.0, and a redundant later assignment is removed.

Changes

IDEX Parking-Space Calculation Fix

Layer / File(s)	Summary
Reordered caching and conditional parking-space logic configuration/macros.cfg	printable_x_max is now cached earlier in START_PRINT; dc_parking_space is computed conditionally based on whether dual_carriage_position_endstop is less than printable_x_max / 2.0, replacing the prior unconditional min(...) logic; the later redundant printable_x_max assignment is removed.

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

Related Issues: Not specified in the provided information.

Related PRs: Not specified in the provided information.

Suggested labels: bug, macros

Suggested reviewers: Not specified in the provided information.

Poem
A rabbit hopped through gcode lines,
Where carriages park by careful signs,
No longer bound to min() alone,
Now half the bed's own width is known,
Hop, tweak, done — the print begins. 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the IDEX parking-space sanity check change and its goal of allowing T1-to-T0 homing configurations.
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.

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[tg73]

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