feat(ui): move pagination to top of nodes table (#4605)

## Summary
- Move the data table pagination controls from the bottom to the top of
the nodes table on the Control Panel
- On small screens (`mdAndDown`), the toolbar row centers all items
horizontally and vertically for better mobile UX
- Spacer between action buttons and pagination is hidden on small
screens so items wrap naturally

Fixes #3603
Supersedes #4488

## Test plan
- [ ] Open Control Panel with multiple pages of nodes
- [ ] Verify pagination controls appear at the top of the table
- [ ] Resize browser below `md` breakpoint and verify toolbar items
center properly
- [ ] Verify page navigation works correctly from the top controls

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: robertsLando

src/components/nodes-table/index.vue

@@ -19,7 +19,11 @@
 		style="margin-bottom: 50px; padding-bottom: 0 !important"
 	>
 		<template #top>
-			<v-row class="my-4 ml-1" justify-start>
+			<v-row
+				class="my-4 mx-1"
+				:justify="$vuetify.display.mdAndDown ? 'center' : 'start'"
+				:align="$vuetify.display.mdAndDown ? 'center' : undefined"
+			>
 				<v-text-field
 					v-model="search"
 					clearable
@@ -106,6 +110,10 @@
 				>
 					Reset Table
 				</v-btn>
+
+				<v-spacer v-if="!$vuetify.display.mdAndDown"></v-spacer>
+
+				<v-data-table-footer />
 			</v-row>
 		</template>
 		<template