fix(token-detail): rest the sheet on the top of the chart

[aminsato]

Closes #5959

Summary

• The token detail sheet rested on the balance and the action row only. The sheet's 48dp cut-edge fade covered the 40dp gap under the actions, so nothing showed below them and the sheet did not look scrollable.
• When the token has a chart, the resting height now reaches past the chart card's price header, so the fade falls across the top of the chart line.
• The extra height is added at composition, not in the onSizeChanged callback. The chart arrives after the block above it has been measured, and without a size change that callback never fires again.
• A coin with no chart keeps the old resting height. ExpandingBottomSheet is unchanged, so expand-on-scroll and pull-down-to-dismiss behave as before.

Note: the issue says iOS rests this sheet at half the screen. On iOS main, CoinDetailScreen uses .presentationDetents([.large]), so this follows the issue's own fix (peek the top of the chart) rather than a half-screen fraction.

Before / After

Before	After (chart)	After (no chart)

Test plan

• ./gradlew assembleDebug
• Emulator: a charted token opens with all five action labels visible, and the chart header plus the top of the line below them
• Emulator: a token with no chart opens at the previous height, with no empty gap
• Large font scale on a device

Summary by CodeRabbit

• Improvements
  • The token details sheet now rests at a height that reveals part of the chart when one is available, making it easier to preview the chart without fully expanding the sheet.
  • When no chart is available, the sheet rests at the actions section.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository: vultisig/vultisig-android/.coderabbit.yaml

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📥 Commits

Reviewing files that changed from the base of the PR and between dd59d28 and bce35fa.

📒 Files selected for processing (1)

• app/src/main/java/com/vultisig/wallet/ui/screens/TokenDetailScreen.kt

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📝 Walkthrough

Walkthrough

The token detail sheet now rests at the measured actions block height plus a chart preview when a chart exists. Without a chart, the preview adds no height. The chart gap and preview height use named constants.

Changes

Token sheet chart preview

Layer / File(s)	Summary
Actions measurement and resting height app/src/main/java/com/vultisig/wallet/ui/screens/TokenDetailScreen.kt	The content reports the measured actions bottom. The sheet adds the 72 dp chart preview when a chart exists. The chart spacer uses the 40 dp ChartGap constant.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Bug fix · Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to bce35

No actionable merge-blocking risk was established; normal validation should still include large-font-scale coverage.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adjusting the token detail sheet to rest at the top of the chart.
Linked Issues check	✅ Passed	The changes meet the coding requirements in [#5959]. TokenDetailScreen measures the action block and adds ChartGap + ChartPeek only when uiModel.chart exists. This exposes the chart preview whil…
Out of Scope Changes check	✅ Passed	The reviewed change is limited to the Android token detail screen's resting-height measurement and chart spacing. It does not change ExpandingBottomSheet, expanded content order, or iOS code. The co…

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[johnnyluo]

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