Add "View Samples" Action from Schema Explorer to Graph View

[kmcginnes]

Problem

When exploring the schema, users may want to quickly see real data for a given node or edge type. Currently, there is no direct way to navigate from the Schema Explorer to the Graph View with sample instances of a selected type loaded.

Proposed Solution

Add a button or link on node/edge types in the Schema Explorer that navigates the user to the Graph View with sample instances of that type loaded. This could work by:

• Navigating to the Graph View and executing a search filtered to the selected type, or
• Navigating to the Graph View and directly adding a small set of sample nodes/edges of that type to the canvas.

Acceptance Criteria

• Each node/edge type in the Schema Explorer has an action to view samples.
• Clicking the action navigates to the Graph View with sample data for that type visible.
• The transition is seamless — the user does not need to manually re-enter the type or configure a search.