feat(RevenueCatUI): add presentation-session state store (PWENG-57)

[AlvaroBrey]

Introduces PaywallStateStore, the runtime state container. Seeded from state_declarations defaults; applyUpdates writes to it and currentValueOrDefault reads with default fallback.

Scoping: standalone paywalls own one store for the duration of the presentation; workflow paywalls share one store across all screens. Re-registering a screen's declarations (on navigation) preserves any values already written by other screens.

Internally uses mutableStateMapOf<String, MutableState<JsonPrimitive>> so a write to one key only invalidates derivedStateOf blocks reading that key, not every component. declaredTypes is a plain ConcurrentHashMap (never snapshot-read).

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Note

Medium Risk
Touches core paywall/workflow state lifecycle and background prewarm concurrency; incorrect store scoping could leak or drop user-driven state across steps or sessions, though behavior is guarded and tested.

Overview
Adds PaywallStateStore, an in-memory, Compose-friendly container for dashboard state-driven paywall keys: it seeds from state_declarations, exposes currentValueOrDefault, and applies typed StateUpdate writes (including payload references) with per-key MutableState so updates don’t over-invalidate UI.

state_declarations now flows through components validation into PaywallState.Loaded.Components.stateStore. PaywallViewModel owns session scoping: one reused store per standalone presentation (survives color/full refresh, cleared on dismiss) and one shared store per workflow impression (each step registerDeclarations without resetting existing keys; navigation/rebuild keeps values). Workflow prewarm captures the store on the main thread and drops stale results if the session store changes.

Unit tests cover seeding, updates, type checks, and re-registration behavior.

^{Reviewed by Cursor Bugbot for commit f23a15e. Bugbot is set up for automated code reviews on this repo. Configure here.}

[AlvaroBrey]

• feat(RevenueCatUI): Tab selected-state (PWENG-65) #3664
• feat(RevenueCatUI): evaluate state conditions in the override resolver (PWENG-57) #3661
• feat(RevenueCatUI): add presentation-session state store (PWENG-57) #3660 👈 (View in Graphite)
• feat(paywalls): add state-driven paywalls data layer (PWENG-57) #3656
• main

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[AlvaroBrey]

@cursor review

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.49%. Comparing base (eefa145) to head (f23a15e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3660   +/-   ##
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  Coverage   80.49%   80.49%           
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  Files         404      404           
  Lines       16771    16771           
  Branches     2397     2397           
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  Hits        13500    13500           
  Misses       2327     2327           
  Partials      944      944           

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[emerge-tools]

📸 Snapshot Test

593 unchanged

Name	Added	Removed	Modified	Renamed	Unchanged	Errored	Approval
TestPurchasesUIAndroidCompatibility Paparazzi com.revenuecat.testpurchasesuiandroidcompatibility.paparazzi	0	0	0	0	258	0	N/A
TestPurchasesUIAndroidCompatibility com.revenuecat.testpurchasesuiandroidcompatibility	0	0	0	0	335	0	N/A

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[AlvaroBrey]

@cursor review

[AlvaroBrey]

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