TRUNK-6644: Fix footer hiding continue button on displays shorter than 850px

[solomonfortune]

What was changed

Updated footer.vm to prevent the fixed footer from overlapping the Continue button during the initial setup wizard on displays with a viewport height smaller than 850px.

Why this PR exists

On displays shorter than 850px in height, the fixed-position footer was rendering on top of the Continue/submit button in the setup wizard, making it impossible for users to proceed through the initial setup.

How it was done

• Updated max-height on .content-container from calc(100vh - 180px) to calc(100vh - 200px) to create more clearance from the footer
• Added a new @media (max-height: 850px) query that increases padding-bottom on the body and further reduces the max-height of .content-container to calc(100vh - 220px), ensuring the content area always remains scrollable and fully above the fixed footer.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[dkayiwa]

@coderabbitai fullreview

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.33%. Comparing base (a711ef6) to head (cd61ae8).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6161      +/-   ##
============================================
- Coverage     59.38%   59.33%   -0.05%     
  Complexity     9337     9337              
============================================
  Files           695      695              
  Lines         37448    37448              
  Branches       5515     5515              
============================================
- Hits          22238    22220      -18     
- Misses        13204    13216      +12     
- Partials       2006     2012       +6     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.