fix: work around Xcode 27 split-file init-accessor linker regression

[Brett-Best]

Summary

Work around a Swift compiler regression in Xcode 27 that affects FlagTextField initializers defined in secondary files.

FlagTextField has @State storage with an init accessor. With Xcode 27, a secondary-file initializer that initializes the value with self = Self(...) can make SILGen emit a reference to a missing stored-property initialization symbol, causing the client link to fail.

This change:

• delegates through self.init(...) in the integer and floating-point convenience initializers;
• applies the iOS/tvOS keyboard type directly after delegation; and
• makes keyboardType writable so those initializers can assign it.

No dependency or Package.resolved changes are included.

Upstream status

The compiler problem is tracked in Swift issue #91700. The proposed fix is Swift PR #91895. As of 2026-09-09, #91895 remains open and in draft and will not make Xcode 27, so this PR remains the workaround for affected Xcode 27 toolchains.

[Brett-Best]

This is not needed for Xcode 27b3 although I'm seeing some other issues around some trait complaints which seem to not be 100% reproducible lol

[Brett-Best]

This is actually still needed for Xcode 27b3 because you get a linking error now instead of a compiler crash.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

🟢 Approval recommended

The change is narrowly scoped to initializer patterns and preserves behavior while addressing the stated Xcode 27 regression workaround.

Pull request overview

This PR implements a workaround for an Xcode 27 Swift compiler/linker regression affecting split-file init-accessors by avoiding self = Self(...) initialization patterns in FlagTextField convenience initializers.

Changes:

• Replaces self = Self(...) with delegating self.init(...) in integer and floating-point FlagTextField convenience initializers.
• Replaces fluent .keyboardType(...) chaining in those initializers with direct keyboardType = ... assignment.
• Adjusts FlagTextField’s keyboardType stored property visibility to allow assignment from the convenience initializers defined in other files.

File summaries

File	Description
Sources/Vexillographer/FlagControl/FlagTextField+Integer.swift	Switches integer convenience initializers to delegating init + direct keyboard type assignment.
Sources/Vexillographer/FlagControl/FlagTextField+FloatingPoint.swift	Switches floating-point convenience initializers to delegating init + direct keyboard type assignment.
Sources/Vexillographer/FlagControl/FlagTextField.swift	Makes keyboardType assignable from extension initializers while keeping runtime behavior the same in body.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Lite

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