feat: Add screenshot picker to feedback

[denrase]

📜 Description

Add a privacy-preserving PHPicker flow to the user feedback form so users can attach one image without photo library authorization.

Preserve the selected image bytes and metadata, enforce the attachment size limit, and support loading, removal, accessibility, and configurable labels. Add enableScreenshot, enabled by default, to Swift and ObjC.

Known image formats are uploaded directly, others fall back to jpeg encoding.

Update the sample, tests, changelog, and generated API surfaces.

💡 Motivation and Context

Closes #7969

💚 How did you test it?

Ran the sample app, verified image reached sentry. Added tests.

• Link to Sentry: https://sentry-sdks.sentry.io/issues/feedback/?feedbackSlug=sentry-cocoa%3A7649460268&mailbox=ignored&referrer=feedback_list_page

📝 Checklist

You have to check all boxes before merging:

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.
• Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.
• If I added a new public API, I also added it to the SentryObjC wrapper.

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against d6148cc

[sentry]

📲 Install Builds

iOS

🔗 App Name	App ID	Version	Configuration
SDK-Size	io.sentry.sample.SDK-Size	9.24.0 (1)	Release

⚙️ sentry-cocoa Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1243.30 ms	1276.21 ms	32.91 ms
Size	24.14 KiB	1.28 MiB	1.26 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
66cfde1	1226.84 ms	1255.50 ms	28.66 ms
a505b7d	1226.52 ms	1260.67 ms	34.15 ms
9c19a06	1217.77 ms	1248.98 ms	31.21 ms
dd40710	1220.65 ms	1251.36 ms	30.71 ms
7b6ea60	1230.86 ms	1250.91 ms	20.05 ms
fd30f64	1226.24 ms	1251.23 ms	24.99 ms
cf226b0	1217.35 ms	1254.55 ms	37.20 ms
16c51a6	1215.72 ms	1256.65 ms	40.93 ms
c5a3e1c	1226.65 ms	1263.67 ms	37.02 ms
10c6b75	1207.09 ms	1241.16 ms	34.07 ms

App size

Revision	Plain	With Sentry	Diff
66cfde1	24.14 KiB	1.20 MiB	1.17 MiB
a505b7d	24.14 KiB	1.19 MiB	1.17 MiB
9c19a06	24.14 KiB	1.16 MiB	1.13 MiB
dd40710	24.14 KiB	1.17 MiB	1.14 MiB
7b6ea60	24.14 KiB	1.18 MiB	1.15 MiB
fd30f64	24.14 KiB	1.26 MiB	1.23 MiB
cf226b0	24.14 KiB	1.24 MiB	1.21 MiB
16c51a6	24.14 KiB	1.17 MiB	1.15 MiB
c5a3e1c	24.14 KiB	1.23 MiB	1.20 MiB
10c6b75	24.14 KiB	1.27 MiB	1.24 MiB

Previous results on branch: feat/user-feedback-attachments

Startup times

Revision	Plain	With Sentry	Diff
1d9c012	1226.90 ms	1268.91 ms	42.01 ms
d7e3fcf	1216.29 ms	1271.80 ms	55.51 ms
c62a0c9	1217.69 ms	1265.09 ms	47.40 ms
5e54c2a	1206.79 ms	1238.12 ms	31.34 ms

App size

Revision	Plain	With Sentry	Diff
1d9c012	24.14 KiB	1.28 MiB	1.25 MiB
d7e3fcf	24.14 KiB	1.27 MiB	1.24 MiB
c62a0c9	24.14 KiB	1.27 MiB	1.25 MiB
5e54c2a	24.14 KiB	1.27 MiB	1.25 MiB

[denrase]

@markushi We are introducing public API changes here, therefore i added you as a reviewer if you can find the time, thx! :bow

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 744aea1. Configure here.}

[sentry]

Bug: Conflicting Auto Layout constraints with priority 1000 are active when the screenshot view is hidden, causing warnings and unpredictable layout.
_{Severity: MEDIUM}

Suggested Fix

To resolve the conflict, either lower the priority of the removeScreenshotButtonHeightConstraint to 999, or dynamically manage the constraints' active state. For example, set isActive = false on the conflicting constraints when the stack view is hidden and isActive = true when it becomes visible.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location:
Sources/Swift/Integrations/UserFeedback/SentryUserFeedbackFormController.swift#L225-L226

Potential issue: When the `removeScreenshotStack` is hidden, `UIStackView` adds a hiding
constraint with priority 1000 to set its height to zero. However, the code adds a
`removeScreenshotButtonHeightConstraint` and a height-equality constraint between
`screenshotImageView` and `removeScreenshotButton`, both with the same required priority
of 1000. This conflict between the system's hiding constraint and the explicit height
constraints will generate Auto Layout warnings and can lead to unpredictable layout
behavior whenever the screenshot view is not visible.