Search chat history by date, use fuzzy matching; allow navigation of chat by date
Searching in chat history should support fuzzy matching (similar to searching in Bing). It should be possible to search in a chat with a specific user, or in a specific group / channel.
Further, results should include the date and time of the messages. This is important to find information when you know approximately when the conversation took place.
It should be also possible to filter chat history by date, and navigate to chat sections within a range of time.