After `Modifier.removeRange` modified the block map, the `targetRange` from
the drop event still referenced stale block keys from the pre-removal DOM
state, causing `TypeError: Cannot read properties of undefined`.
- Added a guarded `moveText` export in `frontend/packages/draft-js/index.js`
that validates block keys exist before and after removal. Falls back
gracefully when target range references stale keys.
- Added a `handle-drop` callback in
`frontend/src/app/main/ui/workspace/shapes/text/editor.cljs` that returns
"handled" for internal drag operations, preventing Draft.js from calling its
default (crash-prone) handler.
AI-assisted-by: mimo-v2.5
Clamp selection offset to node length in setDraftEditorSelection to
prevent DOMException when Draft.js SelectionState offset exceeds the
actual DOM text node length. This can happen during spellcheck, IME
composition, or race conditions during React re-renders.
Updates @penpot/draft-js to commit 09a33e0a which includes the fix
in addPointToSelection and addFocusToSelection.
Fixes#10607
AI-assisted-by: mimo-v2.5-pro
