Don't treat IME composition keys as Enter

[arakawayasuaki]

Problem

Typing Japanese (or any other IME-composed text) sends the prompt half-written. The Enter that commits a kana-kanji conversion reaches our onKeyDown handlers as a plain Enter, so the chat input submits mid-word.

The same bug hits every rename and inline-edit field across the app, and in the ⌘K command palette the arrow keys that pick a conversion candidate move the result selection instead.

There was no isComposing guard anywhere in the frontend.

Fix

Add isComposingKeyEvent() in src/utils/imeComposition.ts — checks nativeEvent.isComposing, plus the legacy keyCode === 229 that Safari still reports on the commit key — and bail out of the affected handlers while composition is in progress.

Guarded inputs:

• ChatInterface.tsx — prompt input, chat-list rename, title edit
• CommandPalette.tsx — ⌘K palette (Enter and the candidate-selection arrow keys)
• FileSidebar.tsx — new-file name, file rename
• ShareModal.tsx — add collaborator, create share link, link name
• GadgetEditor.tsx, WorkpiecePicker.tsx, GadgetList.tsx, SidebarGadgetRow.tsx — title / rename fields
• SettingsPage.tsx, Connections.tsx, ConnectionConfigModal.tsx, AdminFormatsPanel.tsx

Left alone: the Enter/Space handlers on role="button" divs in AdminPage.tsx, routes/outputs.tsx, routes/gatekeepers.tsx, routes/providers.tsx. Those activate buttons rather than edit text, so no IME is ever composing over them.

Testing

tsc --noEmit and oxlint pass with no new findings. Verified manually against a local pnpm run-local build: Japanese conversion now commits without submitting.

🤖 Generated with Claude Code

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