fix(tree): toggle node while filtering and position of the dropdown panel

[kaylaa0]

Detect Fixes:

• fix Tree: Collapse Not Working When Nodes Are Filtered #7232
• fix Tree: The Tree component's collapse functionality is not working #7392
• fix TreeSelect: Wrong position openning upward and using filter #8089
• fix TreeSelect Filter Mode not Lenient #8005
• fix TreeSelect: Collapse/Expand not working if filter is applied #8197

Issue:

• There was a breaking change that did not fully fix the issue it was intended to resolve.
• The main issue was that toggling was not working in a specific case when filtering in a tree.
• Setting node.expanded wasn’t working, as it disrupted the concurrency of expanded nodes by brute forcing expanded nodes during filtering.
• The proposed solution in the previous merge introduced new bugs and did not fully address the concurrency error.
• One of these bugs was that the dropdown panel was not positioned correctly.

Solution:

• Use useRef for currentFilterExpandedKeys.
• Reset currentFilterExpandedKeys after usage.
• Instead of using custom state, use the internal onToggle function.
• Before any filtering starts, merge the current filter's expanded nodes and already expanded nodes to maintain concurrency.
• Then allow any further changes to occur as normal via the onToggle function.

Result / Test Cases:

• When filtering, corresponding nodes are expanded.
• If nodes are already toggled, they are retained in the filtered toggle state.
• Nodes can be freely toggled while in the filtering state.

Above cases are tested and working correctly.

Edit: Also fixes #8005

[melloware]

thanks for the excellent research and fix!