fix(Lifecycle): detach native listeners on scene unload

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Summary

Fixes #321.

GameLifecycle.Reset() cleared only its _initialized flag on scene unload. The native LoadManager and SaveManager can persist across the trip to Menu, so the next Initialize() added another set of listeners to the same events. The change stores those delegate instances and removes them from the managers during reset before a later load registers them again. IL2CPP delegate conversion remains lazy so host tests can load the API without a game runtime.

Reproduction and validation

• Baseline beta/3.2.1-beta.5 (39be958) on IL2CPP 0.4.7f6 build 25439817: one OnLoadComplete subscription ran once on first load and twice after Menu → same save. The probe sent one text per callback, confirming duplicate work.
• With this change, the callback ran once on each load in separate live IL2CPP and Mono 0.4.7f6 build 25439857 runs. The disposable probe waited for a controllable player in Main, returned through LoadManager.ExitToMenu, and loaded the same completed save. The test installs were restored afterward.
• MonoMelon: restore/build and 724/724 host tests passed. Il2CppMelon: restore/build and 710/710 host tests passed. Both configuration graphs were run sequentially.

Compatibility

No public or protected signatures, persistent IDs, save format, or network payloads change. Event subscription remains available across loads; this removes duplicate native registrations while retaining mod subscriptions to the managed events.

Summary by CodeRabbit

• Bug Fixes
  • Game lifecycle resets now remove registered event listeners and clear cached manager references. This helps ensure that reinitializing the lifecycle does not leave stale listeners or cause repeated event handling.

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📝 Walkthrough

Walkthrough

GameLifecycle now caches its load and save managers and six event listener delegates. Reset removes the cached listeners from the managers and clears the manager references.

Changes

Lifecycle listener management

Layer / File(s)	Summary
Cache, subscribe, and remove lifecycle listeners S1API/Lifecycle/GameLifecycle.cs	Initialize stores the load and save managers and caches delegates for the six lifecycle events before subscribing them. Reset removes those listeners and clears the cached manager references.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: 🟡 Moderate · up to d5199

Mods may miss the documented pre-scene callback when loading from the menu again. Preserve that subscription before merging.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely identifies the main change: detaching native lifecycle listeners during scene unload.
Description check	✅ Passed	The description explains the bug, implementation, compatibility impact, and validation results for Mono and IL2CPP, including runtime evidence. It omits the template's Documentation section and uses a…
Linked Issues check	✅ Passed	Issue #321 requires one GameLifecycle.OnLoadComplete callback per load after a menu return. The reviewed GameLifecycle caches the six listener delegates and the LoadManager and SaveManager ins…
Out of Scope Changes check	✅ Passed	The changes are limited to S1API/Lifecycle/GameLifecycle.cs. Delegate caching and listener removal cover the duplicate-callback defect in issue #321. Cleanup for the other lifecycle and save listene…
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 1 files.

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Actionable comments posted: 1

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Inline comments:
In `@S1API/Lifecycle/GameLifecycle.cs`:
- Line 199: Remove the `_preSceneChangeListener` removal from
`GameLifecycle.Reset` so `OnPreSceneChange` remains subscribed during the menu
phase and receives the Menu-to-Main transition.

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📥 Commits

Reviewing files that changed from the base of the PR and between 39be958 and d519981.

📒 Files selected for processing (1)

• S1API/Lifecycle/GameLifecycle.cs

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