Feature: Real-time search/filter box in TreeView (queues, topics, subscriptions)

[RaoulJacobs]

Summary

A real-time filter box above the TreeView that narrows down visible nodes as you type.

Motivation

When a namespace has many queues and topics, scrolling through the tree to find a specific entity becomes tedious. A simple filter box solves this.

Behavior

• TextBox above the TreeView with placeholder "Filter queues/topics..."
• As you type: hides non-matching top-level nodes (queues/topics)
• Deep filter: if filtering on a subscription name, the parent topic stays visible and only non-matching subscriptions are hidden
• Empty filter: full tree restored
• Filter survives tree refresh (re-applied after each ShowEntities call)
• 250ms debounce to avoid stuttering on large namespaces

Implementation

Implemented in our fork tailormade-eu/ServiceBusExplorer on top of upstream HEAD (d71dc35).

Changes: MainForm.cs + MainForm.Designer.cs + NativeMethods.cs (Win32 cue banner for placeholder text).

We are working on extracting the filter logic into a testable unit before submitting a PR.

Question

Is this a feature you'd accept a PR for?

[SeanFeldman]

@RaoulJacobs, could you provide screenshots/vids of what the experience will look like? Thank you.

[RaoulJacobs]

Here's a short demo of the real-time filter in action.

recording-sbexplorer.mp4

The same recording also covers the dashboard (#862) — both features are live.

Two improvements already on the backlog based on testing:

• Dashboard click clears filter — clicking a row in the dashboard should reset the search box so the selected node is visible in the tree
• Right-click → Refresh — context menu on tree nodes currently has no refresh option; single-node refresh flow is already implemented internally, just needs the menu item

[SeanFeldman]

Handy. If you raise a PR, we'll review it. Thank you.

[ErikMogensen]

Agreed!