Encapsulate ir.cpp's own runtime state as static, not global

[netmindz]

Summary

Part of an ongoing pass identifying WLED_GLOBAL declarations that are actually only referenced in one file (see #5777-#5784 for earlier ones). whiteLast turned out to be private to ir.cpp.

Converted it to file-local static, same type and initial value as before.

No behavior change — purely a storage-class change.

Test plan

• esp32dev: builds and links cleanly via pio run -e esp32dev, no warnings.
• Confirmed via repo-wide grep (wled00/, usermods/) that whiteLast is not referenced outside ir.cpp.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Refactor
  • Clarified ownership of an internal brightness state.
  • No user-visible behavior or functionality changed.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 64112dcc-371c-4d18-b880-ae98be990a45

📥 Commits

Reviewing files that changed from the base of the PR and between 0869ef4 and 6b734bc.

📒 Files selected for processing (2)

• wled00/ir.cpp
• wled00/wled.h

---

Walkthrough

The change documents whiteLast as private to ir.cpp and removes its global declaration from wled.h. No executable behavior changes.

Changes

Runtime state encapsulation

Layer / File(s)	Summary
Make whiteLast file-private wled00/ir.cpp, wled00/wled.h	ir.cpp documents ownership of whiteLast. wled.h no longer declares it as a global variable.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• wled/WLED#5777: Applies the same file-private runtime-state encapsulation pattern to Hue state.
• wled/WLED#5778: Removes another WLED_GLOBAL declaration from wled.h.
• wled/WLED#5779: Applies the same pattern to transition and nightlight state.

Suggested reviewers: dedehai, softhack007

🚥 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 clearly summarizes the change by stating that ir.cpp runtime state is encapsulated as file-local static rather than global.
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.

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}