swarm-ui: persist table filters, add reset button, multi-select, negate

Per mara's issue: tables should remember their filters (with a reset
button), the labels filter should be multi-select, and any filter should
support negation (search vs exclude).

All in the shared Table component (ui/table/Table.tsx), used by
AgentsPage/HivesPage/IssueReportPage:

- filters now persist via the same useLocalSetting hook IssueReportPage
  already used for its own state, keyed by a new required storageKey
  prop (required, not optional, so no caller can forget it and every
  table gets persistence for free)
- a small 'reset filters' button clears every column's filter at once,
  shown only when at least one is active
- new filterMode: "multiselect" (+ a filterValues extractor, alongside
  the existing single-value filterValue) renders a checkbox list and
  matches on any overlap - IssueReportPage's own bespoke label-checkbox
  sidebar is folded into this instead of staying a second, separate
  filter mechanism
- a negate toggle ('exclude') sits under every filter mode's control,
  applying uniformly to text/select/multiselect

Verified: tsc --noEmit and the esbuild bundle both clean.

frontend/packages/swarm-ui/src/pages/HivesPage.tsx

@@ -144,7 +144,12 @@ export function HivesPage() {
       ) : null}
       {!error && hives === null ? <p>loading…</p> : null}
       {hives ? (
-        <Table columns={COLUMNS} rows={hives} rowKey={(h) => h.name} />
+        <Table
+          columns={COLUMNS}
+          rows={hives}
+          rowKey={(h) => h.name}
+          storageKey="swarm-ui:hives:table-filters"
+        />
       ) : null}
     </Panel>
   );