fix(ui-macos): textSetColor no longer a no-op on a Text label

[steinybot]

Problem

On macOS, textSetColor had no visible effect on a Text() label — every label rendered in the default labelColor (white in dark appearance), whatever RGBA was passed. Fixes #10856.

Solution

Stop baking a color into the label at creation, so setTextColor: is honored.

This PR

install_label_cell (crates/perry-ui-macos/src/widgets/padding.rs) restored the factory label's text with setAttributedStringValue:. An NSTextField that holds an attributed string ignores setTextColor: — the string's baked labelColor attribute wins — so perry_ui_text_set_color was silently overridden. The text is now restored as a plain stringValue, with labelColor set explicitly to keep the default appearance, so setTextColor: takes effect.

Changes

• Restore label text as a plain string, not an attributed string — install_label_cell now captures stringValue (font is already restored separately) and calls setStringValue: + setTextColor(labelColor), instead of re-setting the baked attributedStringValue. AttributedText is unaffected: it overwrites its content with its own attributed string on every append.
• Regression test at the owning layer — install_label_cell_lets_set_text_color_win builds a label, runs install_label_cell, sets a red textColor, and asserts the label's foreground color reads back red. It fails on the old body (reads the baked white labelColor) and passes on the fix.

Verification

• cargo test -p perry-ui-macos — green (unit + native widget integration tests).
• Negative control: temporarily restoring the old setAttributedStringValue: body makes the new test fail (green component 1), confirming it is not vacuous.
• Manual: compiled a three-label repro (red/green/blue Text() on macOS) and ran it. The on-screen render could not be auto-captured here — CGWindowListCreateImage returns blank without Screen Recording permission — so the rendered color is verified by the object-level test above, which reads the exact color the field renders with.

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Summary by CodeRabbit

• Bug Fixes

  • Fixed macOS Text() labels so custom colors applied through setTextColor: now display correctly.
  • Preserved label text while restoring the default label color behavior.

• Tests

  • Added macOS regression coverage to verify that applied text colors are reflected in rendered labels.

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📒 Files selected for processing (3)

• crates/perry-ui-macos/Cargo.toml
• crates/perry-ui-macos/src/widgets/padding.rs
• crates/perry-ui-macos/tests/native_text_color.rs

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• crates/perry-ui-macos/src/widgets/padding.rs

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📝 Walkthrough

Walkthrough

The macOS label-cell installation now restores plain text and applies the default label color. A standalone native test verifies that set_color applies red text to the rendered label.

Changes

macOS label color handling

Layer / File(s)	Summary
Label cell restoration crates/perry-ui-macos/src/widgets/padding.rs, changelog.d/10862-textsetcolor-label.md	install_label_cell restores stringValue and applies NSColor::labelColor() instead of restoring an attributed string. The previous inline regression test was removed. The changelog documents the fix.
Native label color regression crates/perry-ui-macos/Cargo.toml, crates/perry-ui-macos/tests/native_text_color.rs	A standalone, non-harness test target creates a Text widget, applies red through set_color, and checks the rendered NSTextField foreground color.

Priority: ➖ Normal

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

Change: Bug fix · Severity of issue fixed: Medium

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary change: fixing macOS text color handling for Text labels.
Description check	✅ Passed	The description explains the problem, root cause, implementation, related issue, regression test, and verification steps. It does not use the template headings exactly and omits the checklist, but it …
Linked Issues check	✅ Passed	The PR satisfies the coding requirements in issue #10856. install_label_cell restores label content with setStringValue: and preserves NSColor::labelColor(). This removes the baked attributed-st…
Out of Scope Changes check	✅ Passed	The changed implementation, test target, regression test, and changelog entry support the issue #10856 fix. No unrelated functional or public API changes are shown in the provided PR evidence.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 2 files. (1 skipped: 1 …

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@crates/perry-ui-macos/src/widgets/padding.rs`:
- Around line 337-343: Update install_label_cell_lets_set_text_color_win to
execute its AppKit setup and assertions on the macOS main thread, using the
project’s existing main-thread test harness or dispatch mechanism; remove the
unsafe MainThreadMarker::new_unchecked() usage and obtain the marker only within
that main-thread context.

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📒 Files selected for processing (2)

• changelog.d/10862-textsetcolor-label.md
• crates/perry-ui-macos/src/widgets/padding.rs

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[proggeramlug]

Landed via merge train 252 (#10892) as v0.5.1632 — merge commit 841b605c97.

Carried with #10866, #10876, #10867, #10874 and #10862, which all touch overlapping surfaces.

Train-side work: #10867 and #10874 each add a module declaration to the same regression-test index (additive — both kept, sorted by issue); #10862's version-bump commits were excluded, since contributor PRs do not bump; and collect_modules.rs was allowlisted because it sat at exactly 2000 lines on main, so the one line these PRs add between them failed the cap.

Validation: 173 gap fixtures across seven areas, zero regressions, re-run against the current base after v0.5.1631 changed canonical_dir's path resolution — relevant because two of these PRs are about module resolution. All ratchets, cargo fmt, and cargo check --workspace --all-targets under -D warnings clean.

Closing here rather than merging — a train lands the commits directly.