> CLOSE PD-2697
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## Summary by CodeRabbit
* **Bug Fixes**
* Removing an attachment chip now also removes duplicate attachments
with the same source, preventing duplicate attachments in the AI chat
chip list.
* Removing a selected context chip now also removes duplicate selected
contexts with the same identifier, preventing duplicate context chips.
* Attachments from different sources and chips of other types (document,
file, tag, collection) remain unaffected.
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