fix(feedback): user feedback widget in SwiftUI

[armcknight]

In an attempt to fix #5113, use the correct API to display a floating UIWindow in the SwiftUI app.

Requires consumers to start the sentry api from a configured scene delegate, as demonstrated in the sample swiftui apps in #5222. This would need to be added to the docs for auto injection, and may warrant a separate API to display the feedback widget (this was originally planned, but i removed it as i'd only implemented auto injection. seems we just identified a need for it) if we want to give consumers the option of starting the SDK as early as possible (in a swiftui app's init method) and be able to display the feedback widget as well.

Update: The API to manually display a widget was done in #5236. This PR will fix that functionality in SwiftUI apps. A subsequent PR may attempt to fix the auto-injection situation for SwiftUI apps.

Current status: a build issue detailed in the linked issue this is resolved as of #5524

[armcknight]

New UI test passing: https://github.com/getsentry/sentry-cocoa/actions/runs/16009048791/job/45162392977?pr=5223#step:12:799

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 35 lines in your changes missing coverage. Please review.

Project coverage is 86.228%. Comparing base (ac5e886) to head (1f177f5).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ations/UserFeedback/SentryUserFeedbackWidget.swift	0.000%	23 Missing ⚠️
...Feedback/SentryUserFeedbackIntegrationDriver.swift	0.000%	12 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #5223       +/-   ##
=============================================
+ Coverage   86.194%   86.228%   +0.034%     
=============================================
  Files          407       407               
  Lines        35043     35065       +22     
  Branches     15025     15204      +179     
=============================================
+ Hits         30205     30236       +31     
+ Misses        4795      4788        -7     
+ Partials        43        41        -2     

Files with missing lines	Coverage Δ
...Feedback/SentryUserFeedbackIntegrationDriver.swift	0.000% <0.000%> (ø)
...ations/UserFeedback/SentryUserFeedbackWidget.swift	0.000% <0.000%> (ø)

... and 16 files with indirect coverage changes

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[armcknight]

rebased on top of #5544 to get code coverage working

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1230.64 ms	1251.42 ms	20.78 ms
Size	23.74 KiB	874.07 KiB	850.32 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
b13e93a	1236.24 ms	1247.33 ms	11.08 ms
8047b99	1226.37 ms	1246.63 ms	20.26 ms
db9572a	1223.13 ms	1241.60 ms	18.47 ms
ac4739e	1236.55 ms	1258.89 ms	22.34 ms
9be5373	1215.92 ms	1239.44 ms	23.52 ms
e18d392	1228.69 ms	1244.43 ms	15.73 ms
2481950	1221.04 ms	1248.98 ms	27.94 ms
db9572a	1200.27 ms	1234.80 ms	34.53 ms
d38165b	1211.41 ms	1242.49 ms	31.08 ms
018037b	1209.31 ms	1228.33 ms	19.03 ms

App size

Revision	Plain	With Sentry	Diff
b13e93a	23.75 KiB	855.37 KiB	831.62 KiB
8047b99	23.75 KiB	855.37 KiB	831.62 KiB
db9572a	23.75 KiB	858.64 KiB	834.89 KiB
ac4739e	23.75 KiB	872.67 KiB	848.92 KiB
9be5373	23.75 KiB	866.50 KiB	842.75 KiB
e18d392	23.75 KiB	866.68 KiB	842.93 KiB
2481950	23.74 KiB	872.74 KiB	849.00 KiB
db9572a	23.75 KiB	858.69 KiB	834.93 KiB
d38165b	23.75 KiB	855.37 KiB	831.62 KiB
018037b	23.75 KiB	867.16 KiB	843.41 KiB

Previous results on branch: armcknight/fix/5113-user-feedback-widget-in-swiftui

Startup times

Revision	Plain	With Sentry	Diff
e5f0d42	1215.29 ms	1242.73 ms	27.44 ms

App size

Revision	Plain	With Sentry	Diff
e5f0d42	23.74 KiB	874.08 KiB	850.33 KiB