fix(mobile): prevent collapsed composer hint clipping

[Kapish14]

What Changed

• Limit the Android composer editor to one line while it is in the collapsed, vertically centered state.
• Ellipsize overflowing collapsed text at the end.
• Restore unlimited lines and remove ellipsizing when the composer expands.

Why

On narrow Android screens, the collapsed composer placeholder could wrap onto a second line inside its fixed-height pill. The second line was clipped by the container. Keeping the native editor to one line in its existing singleLineCentered state prevents the clipped text without changing expanded multiline editing.

UI Changes

Before

After

Validation

• Verified the collapsed placeholder is a single ellipsized line on a physical Android device (CPH2707).
• Verified a focused composer expands and wraps a long draft over multiple lines.
• :t3-composer-editor:compileDebugKotlin
• :app:assembleDebug
• Mobile typecheck
• Mobile tests: 580 passed
• Mobile native static check

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes (not applicable; no motion behavior changed)

Note

[!NOTE]

Fix hint text clipping in collapsed mobile composer by restricting to single line with ellipsis

In T3ComposerEditorView.kt, the setCentered method now sets maxLines = 1 and ellipsize = TextUtils.TruncateAt.END when the composer is in centered (collapsed) mode, truncating overflow text instead of clipping it. When not centered, maxLines reverts to Int.MAX_VALUE and ellipsize is cleared.

^{Macroscope summarized b57e616.}

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Note

Low Risk
Small, localized Android native UI change in collapsed composer layout only; no auth, data, or expanded-editor behavior changes.

Overview
Fixes clipped placeholder/hint text on narrow Android screens when the composer is collapsed in its fixed-height pill.

Android T3ComposerEditorView: setSingleLineCentered already toggles vertical gravity; it now also sets maxLines = 1 and TextUtils.TruncateAt.END when centered (collapsed), and restores Int.MAX_VALUE lines with no ellipsize when expanded. Collapsed text stays on one line with trailing ellipsis instead of wrapping into a second line that the container clips.

Expanded multiline editing behavior is unchanged.

^{Reviewed by Cursor Bugbot for commit b57e616. Bugbot is set up for automated code reviews on this repo. Configure here.}

Closes #10860

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[macroscopeapp]

Approvability

Verdict: Approved a344b1a

This is a simple, self-contained UI bug fix that adds standard Android text properties (maxLines, ellipsize) to properly handle text overflow in the collapsed composer hint view. The change has clear intent, limited scope, and no side effects beyond the intended visual improvement.

^{You can customize Macroscope's approvability policy. Learn more.}

[none23]

Would love to see it land
The issue is still present on main @ 85f2479