PM-38610: Bug: Update BitwardenBasicDialog to allow scrolling content

[david-livefront]

🎟️ Tracking

🍒 Cherry pick
PM-38610

📔 Objective

This PR updates the BitwardenBasicDialog to be more like the BitwardenTwoButtonDialog in order to support scrolling content.

📸 Screenshots

Before	After
	Screen_recording_20260605_155645.mp4

[github-actions]

🤖 Bitwarden Claude Code Review

Overall Assessment: APPROVE

Cherry-pick that rewrites BitwardenBasicDialog to wrap Dialog + Column with a verticalScroll on the message text, allowing long content to scroll instead of being clipped. The implementation mirrors the proven BitwardenTwoButtonDialog pattern (same maxDialogHeight/maxDialogWidth clamps, same scroll-driven dividers, same FlowRow button layout). Public API, parameter names, and all test tags are preserved, so the 60+ call sites across :app and :authenticator are unaffected. Before/after screenshots in the PR demonstrate the intended scrolling behavior.

Code Review Details

No findings.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.26%. Comparing base (3e92848) to head (899b4f8).

Additional details and impacted files

@@                   Coverage Diff                   @@
##           release/2026.5-rc55    #7029      +/-   ##
=======================================================
+ Coverage                86.08%   86.26%   +0.17%     
=======================================================
  Files                     1026     1008      -18     
  Lines                    66702    66464     -238     
  Branches                  9356     9323      -33     
=======================================================
- Hits                     57419    57333      -86     
+ Misses                    6063     5917     -146     
+ Partials                  3220     3214       -6     

Flag	Coverage Δ
app-data	17.62% <ø> (ø)
app-ui-auth-tools	19.31% <ø> (ø)
app-ui-platform	16.99% <ø> (-0.01%)	⬇️
app-ui-vault	28.26% <ø> (-0.02%)	⬇️
authenticator	6.21% <ø> (+0.01%)	⬆️
lib-core-network-bridge	4.07% <ø> (-0.01%)	⬇️
lib-data-ui	1.14% <ø> (+<0.01%)	⬆️

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