fix: graph controls gap on compact viewports + model selector z-index

[vorflux]

Summary

Two UI bug fixes:

1. Graph page — controls gap on compact/mobile viewports

Before: NavigationControls was absolutely positioned with bottom: 148 on compact viewports, while Legend was absolutely positioned at bottom: 16. This left ~120px of empty gap between them with no content filling it.

Fix: Both NavigationControls and Legend are now rendered inside a single flex-column container absolutely positioned at bottom: 16, left: 16. They stack flush against each other with an 8px gap — no more empty space regardless of viewport size. Also removed the now-redundant position: absolute / bottom / left / zIndex from Legend's own outerStyle since positioning is handled by the shared container.

2. Model selector dialog z-index

Before: The ChatModelSelector wrapper had no explicit z-index. The SpaceSelector button rendered after it in the DOM would paint on top of the model selector's absolute-positioned dropdown (even though the dropdown had z-50) because later DOM siblings at the same stacking level naturally paint over earlier ones.

Fix: Added z-10 to the ChatModelSelector wrapper div, establishing a stacking context that places the entire model selector (including its dropdown) above the SpaceSelector that follows it.

Version bump

• @supermemory/memory-graph: 0.2.1 → 0.2.2

Testing

• Graph layout fix: verified by code inspection — the flex-column approach renders controls directly above legend with a fixed 8px gap, eliminating the hardcoded bottom: 148 offset that caused the empty space
• Model selector z-index: verified by tracing stacking context — z-10 on the wrapper creates a stacking context above SpaceSelector (z-auto) since both share the parent relative z-20! container from the chat input

---

Session Details

• Session: View Session
• Requested by: Prasanna AP (prasanna@supermemory.com)
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