Deprecate IDP (Identity Provider) login flow

[sfdctaka]

Summary

Marks the IDP (Identity Provider) login flow public API as deprecated (deprecated in 14.0, targeted for removal in 15.0).

As Mobile SDK moves to advanced (browser-based) authentication as the default and only auth mechanism, the IDP flow — where one app acts as an identity provider so other "service provider" apps on the device log in without their own browser round-trip — is being retired. There is no drop-in replacement; apps should move to advanced (browser-based) authentication.

This PR only adds deprecation annotations. It does not remove the flow or change any runtime behavior — IDP keeps working in 14.0. App developers now get a compiler deprecation warning one major release ahead of removal.

What changed

• SFSDK_DEPRECATED(14.0, 15.0, …) (Obj-C) / @available(*, deprecated, …) (Swift) on the public IDP entry points:
  • SalesforceManager (SalesforceSDKManager): isIdentityProvider, identityProviderURLScheme, loginFlowSelectionViewProvider, idpUserSelectionViewProvider
  • UserAccountManager (SFUserAccountManager): the IDP members (isIdentityProvider, isIDPEnabled, idpAppURIScheme, idpLoginFlowSelectionAction, idpUserSelectionAction, IDP response/command handlers, kickOffIDPInitiatedLoginFlowForSP)
  • SPConfig, SFOAuthCoordinator IDP methods, the IDP UI classes, and SFManagedPreferences.idpAppURLScheme
• The SDK's own internal usages are routed around the annotations (non-deprecated sdk_-prefixed accessors over the same backing storage), and implementations of the deprecated methods/accessors are wrapped with -Wdeprecated-implementations pragmas — so the SDK still builds warning-clean.

Notes

• Mirrors the useWebServerAuthentication (OAuth user agent flow) deprecation landed the same release.
• Annotation-only, no behavior change. SalesforceSDKCore builds with zero -Wdeprecated-declarations / -Wdeprecated-implementations warnings.
• Public API surface change — flagging for human review per the repo's escalation policy.
• Companion Android PR marks the equivalent Android IDP surface deprecated.

Test

• xcodebuild build -scheme SalesforceSDKCore → BUILD SUCCEEDED, warning-clean for the touched files.

[github-actions]

	1 Warning
⚠️	Static Analysis found an issue with one or more files you modified. Please fix the issue(s).

Clang Static Analysis Issues

File	Type	Category	Description	Line	Col
SFManagedPreferences	Nullability	Memory error	nil returned from a method that is expected to return a non-null value	128	5
SFManagedPreferences	Nullability	Memory error	nil returned from a method that is expected to return a non-null value	139	5
SFSDKAuthPreferences	Nullability	Memory error	nil passed to a callee that requires a non-null 1st parameter	79	36
SFUserAccountManager	Nullability	Memory error	Null passed to a callee that requires a non-null 2nd parameter	1778	15
SFUserAccountManager	Nullability	Memory error	Null passed to a callee that requires a non-null 2nd parameter	1793	15
SFUserAccountManager	Nullability	Memory error	nil passed to a callee that requires a non-null 1st parameter	2471	21
SFUserAccountManager	Nullability	Memory error	nil passed to a callee that requires a non-null 2nd parameter	2695	13
SalesforceSDKManager	Nil value used as mutex for @synchronized() (no synchronization will occur)	Logic error	Nil value used as mutex for @synchronized() (no synchronization will occur)	171	5
SalesforceSDKManager	Nil value used as mutex for @synchronized() (no synchronization will occur)	Logic error	Nil value used as mutex for @synchronized() (no synchronization will occur)	183	5

Generated by 🚫 Danger

[github-actions]

	Tests	Passed ☑️	Skipped	Failed ❌️
SalesforceSDKCore iOS ^18 Test Results	1009 ran	1007 ✅		2 ❌

Test	Result
SalesforceSDKCore iOS ^18 Test Results
AuthFlowTypesViewTests.testAuthFlowTypesViewRendersSuccessfully()	❌ failure
BiometricAdvancedAuthGateTests.test_awaitSceneActivation_resolvesOnActivationNotification()	❌ failure

[codecov]

Codecov Report

❌ Patch coverage is 40.54054% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 67.39%. Comparing base (7fb2f46) to head (b1b8a98).
⚠️ Report is 10 commits behind head on dev.

Files with missing lines	Patch %	Lines
...ore/Classes/IDP/SFUserAccountManager+URLHandlers.m	0.00%	9 Missing ⚠️
...lasses/IDP/SFSDKUserSelectionTableViewController.m	0.00%	4 Missing ⚠️
...SDKCore/Classes/UserAccount/SFUserAccountManager.m	63.63%	4 Missing ⚠️
...forceSDKCore/Classes/Common/SalesforceSDKManager.m	60.00%	2 Missing ⚠️
...lesforceSDKCore/Classes/OAuth/SFOAuthCoordinator.m	0.00%	2 Missing ⚠️
...forceSDKCore/Classes/Login/SFLoginViewController.m	50.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (40.54%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #4151      +/-   ##
==========================================
- Coverage   70.37%   67.39%   -2.99%     
==========================================
  Files         254      254              
  Lines       22849    22887      +38     
==========================================
- Hits        16080    15424     -656     
- Misses       6769     7463     +694     

Components	Coverage Δ
Analytics	70.78% <ø> (ø)
Common	70.88% <ø> (ø)
Core	61.02% <54.90%> (-4.47%)	⬇️
SmartStore	73.45% <ø> (ø)
MobileSync	88.84% <ø> (ø)

Files with missing lines	Coverage Δ
...DKCore/Classes/Extensions/UserAccountManager.swift	28.57% <ø> (ø)
...lesforceSDKCore/Classes/IDP/SFSDKUITableViewCell.m	0.00% <ø> (ø)
.../Classes/IDP/SFSDKUserSelectionNavViewController.m	0.00% <ø> (ø)
...KCore/SalesforceSDKCore/Classes/IDP/SPConfig.swift	0.00% <ø> (ø)
...Login/LoginHost/SFSDKLoginHostListViewController.m	70.14% <100.00%> (-5.48%)	⬇️
...sforceSDKCore/Classes/OAuth/SFSDKAuthPreferences.m	89.36% <100.00%> (+0.23%)	⬆️
...esforceSDKCore/Classes/Util/SFManagedPreferences.m	83.78% <ø> (ø)
...forceSDKCore/Classes/Login/SFLoginViewController.m	51.30% <50.00%> (-8.93%)	⬇️
...forceSDKCore/Classes/Common/SalesforceSDKManager.m	75.62% <60.00%> (-1.20%)	⬇️
...lesforceSDKCore/Classes/OAuth/SFOAuthCoordinator.m	56.26% <0.00%> (-9.19%)	⬇️
... and 3 more

... and 25 files with indirect coverage changes

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[github-actions]

	Tests	Passed	Skipped	Failed ❌️
AuthFlowTester UI Test Results all	1 ran			1 ❌

Test	Result
AuthFlowTester UI Test Results all
AuthFlowTesterUITests.xctest
LegacyLoginTests.testCAOpaque_DefaultScopes_WebServerFlow()	❌ failure