fix: restore test-used functions, silence tx.Rollback closed errors, prune knip dead code

Restore processImage (images.go) and nonDepositPaymentType (handlers.go) with //nolint:unused — used in test files.
Fix 97 tx.Rollback defers to silently discard expected "tx is closed" error after commit.
Frontend: remove 44 unused shadcn-svelte files, 2 dead components, 9 stale npm deps, prune unused exports.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

frontend/src/lib/components/ui/map/index.ts

@@ -3,11 +3,4 @@ export type { MapViewport } from './Map.svelte';
 export { default as MapMarker } from './MapMarker.svelte';
 export { default as MarkerContent } from './MarkerContent.svelte';
 export { default as MarkerPopup } from './MarkerPopup.svelte';
-export { default as MarkerTooltip } from './MarkerTooltip.svelte';
-export { default as MarkerLabel } from './MarkerLabel.svelte';
 export { default as MapControls } from './MapControls.svelte';
-export { default as MapPopup } from './MapPopup.svelte';
-export { default as MapRoute } from './MapRoute.svelte';
-export { default as MapClusterLayer } from './MapClusterLayer.svelte';
-export { default as MapArc } from './MapArc.svelte';
-export type { MapArcDatum, MapArcEvent, MapArcProps } from './MapArc.svelte';