Format application web resources with Spotless

[ruibaby]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Adds a Spotless webResources format in the application module for server-rendered web assets:

• src/main/resources/templates/**/*.html
• src/main/resources/static/styles/**/*.css
• src/main/resources/static/js/**/*.js

The formatter uses Prettier with shared tabWidth and printWidth settings, letting Prettier infer the parser from each file extension. This keeps template, CSS, and JavaScript formatting checks under the owning application module instead of the repository root.

This PR also applies the formatter to the existing application web resources.

Which issue(s) this PR fixes:

N/A

Special notes for your reviewer:

Validated with:

./gradlew :application:spotlessWebResourcesCheck spotlessCheck

AI-assisted contribution: OpenAI Codex was used to help inspect the existing Spotless configuration, update the Gradle setup, run validation, and prepare this PR.

Does this PR introduce a user-facing change?

NONE

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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• OWNERS

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.03%. Comparing base (42c374d) to head (9d8919e).
⚠️ Report is 588 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #10023      +/-   ##
============================================
+ Coverage     59.55%   61.03%   +1.48%     
- Complexity     3812     4091     +279     
============================================
  Files           677      706      +29     
  Lines         23248    23772     +524     
  Branches       1500     1564      +64     
============================================
+ Hits          13846    14510     +664     
+ Misses         8764     8515     -249     
- Partials        638      747     +109     

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[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