chore: consolidate pagination, document env and toolchain, cover focu…

[Gbemi-programmer]

Summary

This PR addresses four issues consolidating CSS color variables, adding tests for alert simulation, fixing Enter key submission in the SQL textarea, and adding a USD/Native toggle for TVL display.

Changes

closes #959 — Consolidate CSS color variables

• Replaced inline hex values (#22c55e, #f59e0b, #ef4444) with unified status-{success,warning,danger} Tailwind classes across BridgeEdge, ChainNode, Legend, MiniMap, and BridgeSummaryCard.

closes #958 — Add unit tests for useAlertSimulation hook

• Created useAlertSimulation.test.ts covering: simulation runs, HTTP error handling, restoreFromHistory, clearHistory, localStorage persistence, history cap at 20 entries, and loading stored history on init.

closes #956 — Fix Enter key submission in CustomMetricBuilder

• Added onKeyDown handler to the SQL textarea that stops Enter key propagation, preventing unwanted form submission.

closes #957 — Add USD/Native toggle to BridgeSummaryCard

• Added displayMode state ("usd" | "native") and a toggle button in the card header.
• Added optional totalValueLockedNative field to BridgeSummary type.
• Standard and Detailed variants conditionally render TVL based on the selected mode.

closes #959
closes #958
closes #956
closes #957

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