feat: add chat-history and refactor chat logic to a controller

[shibbas]

Purpose

Feature:

• Adds the option to view the past N conversations and include them in the chat API context for generation. Addresses [frontend] save user chat history [frontend] save user chat history  #100

Refactor:

• Decoupled chat message processing logic from rendering into a separate controller. This allows custom chat component to be created but still keep the parsing and processing by reusing the chat controller.
• Also fixed the bug where thoughts and data points could not be selected per message
• Fixed copy to copy the entire text
• Fixed the bug where the chat thread was not being sent for requests in the context
• Fixed the bug where '?' was dropped in the follow up question parsing

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[X] Feature
[ ] Code style update (formatting, local variables)
[X] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

npm run test:playwright

What to Check

Verify that the following are valid

Verify that the following are valid

Chat history button shows up for chat, but not ask
Chat history is preserved in the localstorage as an example
History is included in the context for the chat.

Other Information