fix(app): preserve web Promise contracts

[OskarEichler]

What this fixes

The web App shim returned plain values from methods whose native specs and public contract are asynchronous. Code using .then() or .catch() therefore failed on web even though await appeared to work.

This makes the web implementations return real Promises for metadata, JSON config, preferences, listener diagnostics, and event pings. eventsPing now also resolves with the event body, matching the native implementations. Existing await behavior is unchanged.

Verification

• Added a focused regression covering every corrected Promise contract
• Focused App Jest: 7/7 passed
• Full Jest: 104 suites passed
• yarn lerna:prepare
• yarn tsc:compile
• yarn tsc:compile:consumer
• yarn lint:deps
• yarn reference:api
• yarn compare:types
• Focused ESLint and git diff --check

Compatibility

No public API or type changes. This is a web-only runtime compatibility fix; callers already using await retain the same behavior, while Promise chaining now works consistently with native.

[mikehardy]

Hey @OskarEichler 👋

Thanks for the PR - this looks like a real problem to me. I ran local Jest/unit plus the android/ios/macos e2e suite against it here and it came out clean. Pending CI, then I'll merge.

Cheers

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.49%. Comparing base (81beeca) to head (2241206).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #9260      +/-   ##
============================================
- Coverage     68.50%   68.49%   -0.00%     
+ Complexity     1915     1914       -1     
============================================
  Files           522      522              
  Lines         38116    38117       +1     
  Branches       5189     5189              
============================================
- Hits          26108    26106       -2     
+ Misses        10222    10221       -1     
- Partials       1786     1790       +4     

Flag	Coverage Δ
android-native	63.75% <ø> (-<0.01%)	⬇️
e2e-ts-android	53.94% <ø> (-0.05%)	⬇️
e2e-ts-ios	53.50% <ø> (ø)
e2e-ts-macos	49.67% <100.00%> (-0.01%)	⬇️
ios-native	68.77% <ø> (-<0.01%)	⬇️
ios-ruby	100.00% <ø> (ø)
jest	46.36% <100.00%> (+0.10%)	⬆️

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