fix(ime): prevent form submission during IME composition steps

[mosaxiv]

Summary

When users type with an Input Method Editor (IME)—such as Japanese, Chinese, or Korean input—the Enter key is used to confirm the composed text, not to submit the message.
Previously, pressing Enter during this composition phase unintentionally triggered message submission.
This PR adds a check for e.nativeEvent.isComposing so that the message is only sent after the user has finished composing text.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation
• Other: ___________

Testing

• Confirm that pressing Enter during IME composition does not send the chat message.
• Confirm that a normal Enter key press still sends the message as expected.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Screenshots/Videos

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[greptile-apps]

Greptile Overview

Greptile Summary

This PR fixes an IME (Input Method Editor) bug where pressing Enter during text composition for Japanese, Chinese, or Korean input would unintentionally submit the chat message instead of finalizing the composed text.

Key Changes

• IME Composition Fix: Added !e.nativeEvent.isComposing check to the Enter key handler in user-input.tsx:394 to prevent message submission during IME composition
• Developer Environment: Added IntelliJ IDEA files (.idea) to .gitignore

Analysis

The fix is minimal, targeted, and follows the standard pattern for handling IME composition events in web applications. The isComposing property is a standard DOM API that indicates when input is being composed through an IME, making this solution both correct and maintainable.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The change is a single-line addition using a standard DOM API (isComposing) to fix a well-defined bug. The fix follows established patterns for handling IME composition, has no side effects, and only affects Enter key behavior during text composition. The .gitignore change is a standard developer environment configuration.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
.gitignore	5/5	added IntelliJ IDE files (.idea) to gitignore
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/copilot/components/user-input/user-input.tsx	5/5	added !e.nativeEvent.isComposing check to prevent form submission during IME composition

Sequence Diagram

sequenceDiagram
    participant User
    participant IME as Input Method Editor
    participant Textarea
    participant Handler as handleKeyDown
    participant Submit as handleSubmit

    Note over User,Submit: Scenario 1: IME Composition (Japanese/Chinese/Korean)
    User->>IME: Type characters (e.g., "nihon")
    IME->>Textarea: Start composition
    User->>Textarea: Press Enter (to confirm IME)
    Textarea->>Handler: KeyboardEvent (isComposing=true)
    Handler->>Handler: Check: e.key === 'Enter' && !e.shiftKey && !e.nativeEvent.isComposing
    Note over Handler: isComposing=true, condition fails
    Handler-->>Textarea: Allow default behavior (finalize composition)
    IME->>Textarea: Finalize text (e.g., "日本")
    
    Note over User,Submit: Scenario 2: Normal Enter Key Press
    User->>Textarea: Type "hello"
    User->>Textarea: Press Enter (to submit)
    Textarea->>Handler: KeyboardEvent (isComposing=false)
    Handler->>Handler: Check: e.key === 'Enter' && !e.shiftKey && !e.nativeEvent.isComposing
    Note over Handler: All conditions pass
    Handler->>Handler: e.preventDefault()
    Handler->>Submit: Call handleSubmit()
    Submit->>Submit: Send message

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Project	Deployment	Preview	Comments	Updated (UTC)
docs	Ready	Preview	Comment	Dec 10, 2025 3:45am