feat: visual notification inbox overlay UI (chrome + Jist rendering)

[mahmoud-elmorabea]

Visual Notification Inbox overlay UI stacked on the data-layer PR: floating bell + unread badge + slide-out panel, each message rendered via Jist (type→template, typed properties→data, templates+theme), auto-mark-opened with in-flight dedupe, read-only get-messages + unopened-count, touch-capturing overlay, and empty/loading states. Consumes the internal VisualInbox (headless NotificationInbox left intact).

Scope: items 6–11. Deferred to follow-up: items 12–18 (click/action mapping, performAction host API, marking-read web parity, no-template fallback, chrome theming + dark, date format) and the branding floatingIcon.svg bell (uses default bell for now).

Interim: Jist referenced locally (TODO: switch to published artifact). iOS only: package floor temporarily raised 13→15 for the Jist dependency (Jist render @available(iOS 15)-gated + 13/14 fallback; revert at Jist M0). Android: jist compiled in-tree + desugaring/minSdk override (TODO: published artifact).

🤖 Generated with Claude Code

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Sample app builds 📱

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[codecov]

Codecov Report

❌ Patch coverage is 25.00000% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.68%. Comparing base (a8abc78) to head (e703598).

Files with missing lines	Patch %	Lines
...va/io/customer/messaginginapp/inbox/VisualInbox.kt	0.00%	8 Missing ⚠️
...tomer/messaginginapp/inbox/data/InboxRepository.kt	66.66%	1 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                   @@
##             inbox-data-layer     #747      +/-   ##
======================================================
+ Coverage               69.51%   69.68%   +0.16%     
- Complexity               1001     1006       +5     
======================================================
  Files                     169      169              
  Lines                    5318     5330      +12     
  Branches                  736      736              
======================================================
+ Hits                     3697     3714      +17     
+ Misses                   1349     1340       -9     
- Partials                  272      276       +4     

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[github-actions]

• java_layout: Build failed. See CI job logs to determine the issue and try re-building.

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• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

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• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

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• java_layout: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• java_layout: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• java_layout: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• java_layout: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• java_layout: Build failed. See CI job logs to determine the issue and try re-building.

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• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• kotlin_compose: Build failed. See CI job logs to determine the issue and try re-building.

[github-actions]

• java_layout: Build failed. See CI job logs to determine the issue and try re-building.