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fix(BottomSheet): fallback to background.default and adapt text color - #1823

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KhushamBansal:fix/bottom-sheet-header-theme
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fix(BottomSheet): fallback to background.default and adapt text color#1823
KhushamBansal wants to merge 6 commits into
layer5io:masterfrom
KhushamBansal:fix/bottom-sheet-header-theme

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@KhushamBansal

@KhushamBansal KhushamBansal commented Aug 28, 2026

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Notes for Reviewers

This PR fixes #

Screenshot 2026-08-28 at 8 57 58 PM

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  • Yes, I signed my commits.

Summary by CodeRabbit

  • New Features

    • Added customizable header background and text colors for dashboard layouts and mobile bottom sheets.
    • Bottom Sheet headers now use the theme’s surface tint when no custom background is provided.
  • Bug Fixes

    • Improved header text and close-button contrast across light and dark themes.
    • Corrected fallback behavior for empty or unavailable header backgrounds.
    • Updated default header colors to align with application theme settings.

Signed-off-by: KhushamBansal <kbkhushambansal@gmail.com>
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📒 Files selected for processing (1)
  • src/custom/BottomSheet/BottomSheet.tsx
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📝 Walkthrough

Walkthrough

DashboardLayout now accepts optional header color props and forwards them to the mobile BottomSheet. BottomSheet resolves header and close-button colors from explicit props and theme values.

Changes

BottomSheet theme color handling

Layer / File(s) Summary
DashboardLayout color prop wiring
src/custom/DashboardLayout/DashboardLayout.tsx
DashboardLayoutProps adds optional header background and text colors. DashboardLayout forwards them to the mobile BottomSheet.
Compute and apply header colors
src/custom/BottomSheet/BottomSheet.tsx, src/__testing__/BottomSheet.test.tsx
BottomSheet uses readableTextColor for explicit backgrounds, uses white text for tint-based headers, and falls back through theme values with `

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

Merge Risk: 🔵 Low · up to c30aa

The BottomSheet theme change still bypasses the required Sistent theme and semantic color contracts, which may cause inconsistent backgrounds or text colors across supported themes. The PR is mergeable with explicit owner follow-up to align that contract.

Suggested reviewers: rishiraj38

🚥 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 1 functions across 3 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 summarizes the main BottomSheet changes: fallback to background.default and adaptive header text color.
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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@PARTH-TUSSLE PARTH-TUSSLE left a comment

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Hey @KhushamBansal , the main thing I noticed is that the text/icon color fallback is checking whether surface.tint exists, rather than the background that actually ends up being rendered.
For example, if someone passes headerBackgroundColor="#fff", we'd still get common.white for the text because surface.tint exists, which gives us white-on-white.
I think we should resolve the final header background first, then derive the default text color from that, while still letting an explicit headerTextColor override it. Also, we could resolve that text color once and reuse it for both the title and close icon instead of duplicating the logic.

Signed-off-by: KhushamBansal <kbkhushambansal@gmail.com>
@KhushamBansal

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Hey @KhushamBansal , the main thing I noticed is that the text/icon color fallback is checking whether surface.tint exists, rather than the background that actually ends up being rendered. For example, if someone passes headerBackgroundColor="#fff", we'd still get common.white for the text because surface.tint exists, which gives us white-on-white. I think we should resolve the final header background first, then derive the default text color from that, while still letting an explicit headerTextColor override it. Also, we could resolve that text color once and reuse it for both the title and close icon instead of duplicating the logic.

@PARTH-TUSSLE Thanks for reviewing this PR. I have made the change.

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🧹 Nitpick comments (1)
src/custom/BottomSheet/BottomSheet.tsx (1)

2-2: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Use the Sistent theme boundary and semantic color tokens.

BottomSheet imports MUI's useTheme directly and uses common.white and text.primary. Import useTheme from ../../theme and use the semantic text and icon tokens.

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In `@src/custom/BottomSheet/BottomSheet.tsx` at line 2, Update BottomSheet’s theme
usage to import useTheme from ../../theme instead of `@mui/material/styles`, and
replace common.white and text.primary references with the established semantic
text and icon color tokens.

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Nitpick comments:
In `@src/custom/BottomSheet/BottomSheet.tsx`:
- Line 2: Update BottomSheet’s theme usage to import useTheme from ../../theme
instead of `@mui/material/styles`, and replace common.white and text.primary
references with the established semantic text and icon color tokens.

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…lor to BottomSheet

Signed-off-by: KhushamBansal <kbkhushambansal@gmail.com>
Comment thread src/custom/BottomSheet/BottomSheet.tsx Outdated
@@ -1,4 +1,5 @@
import Slide, { SlideProps } from '@mui/material/Slide';
import { useTheme } from '@mui/material/styles';

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use it from ../../theme

Comment thread src/custom/BottomSheet/BottomSheet.tsx Outdated
headerBackgroundColor || tint || theme.palette.background.default;
const usingTint = !headerBackgroundColor && Boolean(tint);
const finalHeaderTextColor =
headerTextColor || (usingTint ? theme.palette.common.white : theme.palette.text.primary);

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it should be theme.palette.text.inverse : theme.palette.text.default

Signed-off-by: KhushamBansal <kbkhushambansal@gmail.com>
@NSTKrishna
NSTKrishna requested a review from rishiraj38 August 29, 2026 17:26

@PARTH-TUSSLE PARTH-TUSSLE left a comment

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Thanks @KhushamBansal! The fallback to background.default, sharing the header foreground across the title/close icon, and prop forwarding in DashboardLayout look great.

One remaining contrast edge case: if someone passes a dark custom headerBackgroundColor (e.g. #121212), usingTint is false,
which defaults to text.default (dark text in light mode), resulting in low contrast.

We can use Sistent's readableTextColor helper from ../../theme so custom backgrounds adapt automatically while keeping explicit
headerTextColor as the priority override:

    import { useTheme, readableTextColor } from '../../theme';

    // ...
    const tint = theme.palette.surface?.tint;
    const finalHeaderBackgroundColor =
      headerBackgroundColor ?? tint ?? theme.palette.background.default;

    const defaultForeground = headerBackgroundColor
      ? readableTextColor(headerBackgroundColor, theme.palette.text.inverse, theme.palette.text.default)
      : tint ? theme.palette.text.inverse : theme.palette.text.default;

    const finalHeaderTextColor = headerTextColor ?? defaultForeground;

Could you also add a few quick unit tests for BottomSheet covering:
• Default surface.tint fallback
• Missing tint → background.default fallback
• Custom light / dark background contrast
• Explicit headerTextColor override

Other than that, this looks ready to go!

…lor contrast

When a caller passes a dark custom headerBackgroundColor (e.g. #121212),
the previous code fell back to text.default (dark ink in light mode),
producing low-contrast text.

Changes:
- Import and use readableTextColor to auto-select contrast-safe ink when
  a custom headerBackgroundColor is supplied
- Tint path now uses theme.palette.common.white (tint is always a dark
  gradient in both palettes, matching Modal/UniversalFilter behaviour)
- Swap || for ?? so an empty-string headerBackgroundColor is not silently
  ignored
- Explicit headerTextColor still takes priority via ?? override

Also adds BottomSheet.test.tsx with 7 unit tests covering:
- Default surface.tint fallback (light + dark mode)
- Missing tint -> background.default fallback
- Custom dark background (#121212) contrast
- Custom light background (#f5f5f5) contrast
- Explicit headerTextColor override
- Close-button icon inherits resolved fill colour

Signed-off-by: KhushamBansal <kbkhushambansal@gmail.com>

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Actionable comments posted: 1

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@src/custom/BottomSheet/BottomSheet.tsx`:
- Line 46: Update the header background fallback expression in BottomSheet so an
empty headerBackgroundColor is treated as absent and falls back to tint, then
theme.palette.background.default; keep its behavior consistent with the
text-color calculation at the nearby line.
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Comment thread src/custom/BottomSheet/BottomSheet.tsx Outdated
Use || instead of ?? for the finalHeaderBackgroundColor fallback chain
so that an empty string ("") is treated as falsy and falls through to
the tint or background.default, rather than being passed as an invalid
CSS color value to readableTextColor and the background style.

Signed-off-by: KhushamBansal <kbkhushambansal@gmail.com>

@Katotodan Katotodan left a comment

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Looking good overall, just one suggestion.

sidebarWidth = { xs: '100%', md: '350px' },
sidebarTopOffset = '0',
sidebarHeight = '100vh'
sidebarHeight = '100vh',

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Would it be better to set sidebarHeight to 100dvh instead of 100vh to account for dynamic viewport changes?

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4 participants