feat(surveys): auto-submit rating and single-choice selections

[lucasheriques]

💡 Motivation and Context

Honor skipSubmitButton in iOS surveys, moving toward survey feature parity across all PostHog SDKs, with posthog-js as the reference. Eligible selections submit through the existing response/navigation callback without an extra tap.

Question	skipSubmitButton: true	False or absent
Numeric/emoji rating	Submit on selection	Explicit submit
Single choice without an open option	Submit on selection	Explicit submit
Single choice with an open option	Explicit submit	Explicit submit
Multiple choice	Explicit submit	Explicit submit

The raw flag is exposed to custom renderers and defaults to false. Each selection forwards its answer once; the next question starts without the previous selection.

Closes #448. Partial-response collection and persistent resume are covered separately in #807.

Review path

1. Interaction tests: real taps, button visibility, answer values and next-question state.
2. Display mapping and question models: flag propagation and eligibility.
3. Question views and SurveySheet: submission and selection reset.

💚 How did you test it?

Passed: make testSurveyUI (7 XCUITests), make test, formatting/lint, API checks and CodeScene. Tests cover eligible/manual paths, open-choice text, multiple choice, optional manual skip, returned branching destinations and exact answer sequences. Removing the question identity reset made the stale-selection regression fail.

The test host mounts the real sheet/controller with a response recorder. Before combining with #807, reconcile the Xcode project conflict and test auto-submit through persistent resume and partial-event capture together.

Sample app screenshots

Captured from this PR's SDK (786fee5) running in the sample app on iPhone 17 Pro simulator, iOS 26.5. A local HTTP fixture supplies the survey; SDK fetching, event targeting and native presentation run through the normal app integration.

Rating: no submit button	After tapping 4: next question	Other: explicit submit

Tapping 4, then Easy to use, advanced without a submit tap. Entering Better search under Other required Submit; the local receiver recorded one survey sent event with all three answers.

📝 Checklist

• Interaction tests and independent review completed.
• API compatibility and changesets covered.

🤖 Agent context

Autonomy: Human-driven (agent-assisted). Codex implemented the changes with independent QA agents; human review is required.

[greptile-apps]

Prompt To Fix All With AI

### Issue 1
PostHog/Surveys/QuestionTypes.swift:155-159
**Auto-submit wiring lacks coverage**

The new tests verify decoding and eligibility, but they do not exercise the SwiftUI behavior added here. There is no interaction test confirming that selecting a rating or single choice calls `onNextQuestion` exactly once with the correct answer, hides the submit button, and resets selection state when the question changes. A regression in this core behavior could therefore pass the test suite. Please add an interaction test that hosts the affected question views or `SurveySheet` and verifies these behaviors.

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

_{Reviews (1): Last reviewed commit: "feat(surveys): auto-submit rating and si..." | Re-trigger Greptile}

[github-actions]

posthog-ios Compliance Report

Date: 2026-09-09 15:47:36 UTC
Duration: 215128ms

✅ All Tests Passed!

45/45 tests passed

---

Capture Tests

✅ 29/29 tests passed

View Details

Test	Status	Duration
Format Validation.Event Has Required Fields	✅	2907ms
Format Validation.Event Has Uuid	✅	2776ms
Format Validation.Event Has Lib Properties	✅	2811ms
Format Validation.Distinct Id Is String	✅	2922ms
Format Validation.Token Is Present	✅	2846ms
Format Validation.Custom Properties Preserved	✅	2918ms
Format Validation.Event Has Timestamp	✅	2994ms
Retry Behavior.Retries On 503	✅	5414ms
Retry Behavior.Does Not Retry On 400	✅	4829ms
Retry Behavior.Does Not Retry On 401	✅	2594ms
Retry Behavior.Respects Retry After Header	✅	7762ms
Retry Behavior.Implements Backoff	✅	15498ms
Retry Behavior.Retries On 500	✅	9350ms
Retry Behavior.Retries On 502	✅	9290ms
Retry Behavior.Retries On 504	✅	9342ms
Retry Behavior.Max Retries Respected	✅	15374ms
Deduplication.Generates Unique Uuids	✅	3376ms
Deduplication.Preserves Uuid On Retry	✅	9282ms
Deduplication.Preserves Uuid And Timestamp On Retry	✅	16895ms
Deduplication.Preserves Uuid And Timestamp On Batch Retry	✅	8015ms
Deduplication.No Duplicate Events In Batch	✅	3182ms
Deduplication.Different Events Have Different Uuids	✅	2876ms
Compression.Sends Gzip When Enabled	✅	2837ms
Batch Format.Uses Proper Batch Structure	✅	2720ms
Batch Format.Flush With No Events Sends Nothing	✅	245ms
Batch Format.Multiple Events Batched Together	✅	2900ms
Error Handling.Does Not Retry On 403	✅	4778ms
Error Handling.Does Not Retry On 413	✅	4788ms
Error Handling.Retries On 408	✅	9210ms

Feature_Flags Tests

✅ 16/16 tests passed

View Details

Test	Status	Duration
Request Payload.Request With Person Properties Device Id	✅	2785ms
Request Payload.Flags Request Uses V2 Query Param	✅	2774ms
Request Payload.Flags Request Hits Flags Path Not Decide	✅	2960ms
Request Payload.Flags Request Omits Authorization Header	✅	2875ms
Request Payload.Token In Flags Body Matches Init	✅	2744ms
Request Payload.Groups Round Trip	✅	2881ms
Request Payload.Groups Default To Empty Object	✅	2815ms
Request Payload.Person Properties Distinct Id Auto Populated When Caller Omits It	✅	2918ms
Request Payload.Disable Geoip False Propagates As Geoip Disable False	✅	2891ms
Request Payload.Disable Geoip Omitted Defaults To False	✅	2851ms
Request Payload.Flag Keys To Evaluate Contains Only Requested Key	✅	2694ms
Request Lifecycle.No Flags Request On Init Alone	✅	129ms
Request Lifecycle.No Flags Request On Normal Capture	✅	430ms
Request Lifecycle.Two Flag Calls Produce Two Remote Requests	✅	5616ms
Request Lifecycle.Mock Response Value Is Returned To Caller	✅	2980ms
Side Effect Events.Get Feature Flag Captures Feature Flag Called Event	✅	2995ms