Add a small external-link icon next to the tool display name in the
collapsed tool card header (Write/Edit/MultiEdit/ApplyPatch), so the
target file can be opened in the side panel (web/desktop) or editor
(VS Code) without expanding the card.
On web/desktop (no runtime.editor), the icon falls back to
useUIStore.openContextFile{AtLine} + mobileActions.openFiles(), matching
the existing openEntryFile pattern. The existing handleMainClick only
opens the file when runtime.editor is available, so this icon is the
first way to open a file from the tool header in the browser.
Path resolution reuses getPrimaryToolPath + toAbsoluteFilePath; the diff
tools also resolve the first changed line and primary diff via the
existing getFirstChangedLineFromMetadata / getPrimaryDiffFromMetadata
helpers. The icon stops click propagation so the card-toggle-on-click
behavior is preserved.
Adds the chat.toolPart.openFile i18n key across all 11 locales.
Roberto Berto
14c40c9615