PM-39349: feat: Update Plan Screen

[david-livefront]

🎟️ Tracking

PM-39349

📔 Objective

This PR updates the Plan Screen for Free Users.

📸 Screenshots

Before	After

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

Reviewed the Plan Screen redesign for free users (PM-39349). The change restructures PremiumDetailsCard into an illustration + benefits list, adds a gradient card background for non-dynamic themes, introduces an isDynamicTheme flag on BitwardenColorScheme, and updates the price/CTA copy. Unit tests were updated to match the new strings and scroll behavior, and drawable assets are provided across all density buckets (light and night).

Code Review Details

No blocking findings.

Notes verified during review:

• The new isDynamicTheme field has no default value, so the compiler forces all three BitwardenColorScheme construction sites (dark, light, dynamic) to be updated — all are correctly set.
• The removed strings (per_month, upgrade_now, youll_go_to_stripes_secure_checkout...) are no longer referenced in Kotlin; remaining occurrences live only in Crowdin-managed values-* translation files, which is expected.
• img_premium and bg_card_gradient are supplied for both light and night variants across all densities.
• PlanScreenTest assertions align with the new copy and the added performScrollTo() calls.

[codecov]

Codecov Report

❌ Patch coverage is 93.90244% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.85%. Comparing base (36c892e) to head (4b259fa).

Files with missing lines	Patch %	Lines
...den/ui/platform/feature/premium/plan/PlanScreen.kt	95.06%	2 Missing and 2 partials ⚠️
.../ui/platform/feature/premium/plan/PlanViewModel.kt	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7155      +/-   ##
==========================================
- Coverage   85.89%   85.85%   -0.04%     
==========================================
  Files         927      885      -42     
  Lines       66232    64731    -1501     
  Branches     9640     9599      -41     
==========================================
- Hits        56892    55578    -1314     
+ Misses       5887     5708     -179     
+ Partials     3453     3445       -8     

Flag	Coverage Δ
app-data	17.63% <0.00%> (+0.32%)	⬆️
app-ui-auth-tools	18.79% <0.00%> (+0.12%)	⬆️
app-ui-platform	16.51% <93.90%> (-0.33%)	⬇️
app-ui-vault	27.47% <0.00%> (-0.60%)	⬇️
authenticator	6.12% <0.00%> (-0.02%)	⬇️
lib-core-network-bridge	4.03% <0.00%> (-0.02%)	⬇️
lib-data-ui	1.14% <0.00%> (+0.01%)	⬆️

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