Better dialog branching, maybe visualize the tree flow

[ed-parsadanyan]

First of all, LibreChat is an exciting project, I use it a lot.

However, complex chats have inconvenient branching navigation.

Right now, the UI doesn't allow working with complex chats easily:

• Once I open a saved chat, it always defaults to the latest branch (solid lines on the picture below)
• The dotted branches are not visible at high-level.
• Hard to use multilevel nested navigation, because I need to select correct branches starting from the top under individual relevant messages.
• Also, there's no way to delete / ignore unnecessary parts of the dialog within the same branch. What I mean that instead of making a new branch I could mark certain dialog pairs (USER - AI) as inactive to skip over them.

flowchart TD
    n2["User"] --> n3["AI"]
    n3 --> n4["User"]
    n5["Agent"] -.-> n6["User"]
    n4 -. (1) .-> n5
    n4 -- (2) --> n7["AI"]
    n6 -. (1) .-> n8["AI"]
    n6 -. (2) .-> n9["AI"]
    n6 -. (3) .-> n10["AI"]
    n7 -. (1) .-> n11["User"]
    n7 -- (2) --> n12["User"]

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Some kind of visualisation (Workflow Diagram / Branching Diagram) would be really helpful to navigate.
This topic is somehow connected to #2908, but in those discussions high-level visuaisation wasn't mentioned.