Fix IME not enabled on Linux/Wayland (set_ime_allowed missing from Linux path)

[leozeli]

Description

Fixes #9383 (related: #6877)

winit::Window::set_ime_allowed(true) was wrapped inside a #[cfg(windows)] block in create_window(), so on Linux/Wayland it was never called. Without this call, winit never sends zwp_text_input_v3.enable() to the Wayland compositor — meaning the compositor never activates the IM session for the window, and input methods (fcitx5, ibus) never receive a keyboard grab. The result: pressing the IME trigger key (Ctrl+Space) has no effect, and CJK/IME input is completely broken on Wayland.

Fix: add an equivalent #[cfg(target_os = "linux")] block immediately after the #[cfg(windows)] block, calling set_ime_allowed(true) when window creation succeeds.

#[cfg(target_os = "linux")]
if let Ok(window) = created_window.as_ref() {
    window.set_ime_allowed(true);
}

Testing

• Tested on Arch Linux, Hyprland 0.54.3 (Wayland), fcitx5 + Rime
• Before fix: fcitx5-remote stays at state 1 (inactive) with Warp focused; Ctrl+Space has no effect
• After fix: fcitx5-remote transitions to state 2 (active); Rime preedit and CJK commit work correctly in the terminal input
• cargo check -p warpui passes; cargo build --bin warp-oss succeeds

No new automated tests added — the IME activation path is a Wayland protocol side-effect that requires a live compositor to exercise.

Changelog Entries for Stable

CHANGELOG-BUG-FIX: Fixed IME (fcitx5, ibus) not activating on Linux/Wayland, restoring CJK and other input-method-based input

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@leozeli

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[oz-for-oss]

Overview

This PR enables winit IME support on Linux after successful window creation, matching the existing Windows behavior so Wayland compositors can activate text input for IME users.

Concerns

• No blocking correctness or security concerns found in the changed lines. The local security-review-pr skill was not present in this checkout, so I performed the supplemental security pass using the base review security criteria.

Verdict

Found: 0 critical, 0 important, 0 suggestions

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[leozeli]

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