fix(ui): follow-up polish — icons, dashboard bar, filter redesign, bounty/creds sort

- Dashboard: fix invisible bar at bottom of LIVE FEED by constraining
  max-height on the section instead of the inner container; same fix
  for side panels
- Page icons: add violet-accent icon beside h1 on all 9 missing pages
  (CanaryTokens, RealismConfig, SyntheticFiles, PersonaGeneration,
  Attackers, Webhooks, LiveLogs, Topologies, DecoyFleet)
- Attackers filter chips: replace ad-hoc chip buttons with seg-group
  tabs (ALL / ACTIVE N / PASSIVE N / INACTIVE N) matching Credential
  Vault style; country chips use same seg-group treatment
- Credential Vault: add sortable headers to REUSE tab (LAST SEEN,
  PRINCIPAL, KIND, TARGETS, ATTEMPTS); reuses same SortTh pattern
- Bounty: remove CREDENTIALS and PAYLOADS tabs; keep ALL, ARTIFACTS,
  FINGERPRINTS; add EMAIL (artifact subtype, filtered client-side)

decnet_web/src/components/SyntheticFiles/SyntheticFiles.tsx

@@ -2,7 +2,7 @@ import React, { useEffect, useMemo, useRef, useState } from 'react';
 import api from '../../utils/api';
 import { useEscapeKey } from '../../hooks/useEscapeKey';
 import { useFocusTrap } from '../../hooks/useFocusTrap';
-import { X } from '../../icons';
+import { X, FileText } from '../../icons';
 import { contentClassLabel, isCanaryClass } from '../../realism/labels';
 // Reuse the DeckyFleet shell + the persona-page tweaks so this page reads
 // the same as the rest of the realism nav group.
@@ -241,7 +241,10 @@ const SyntheticFiles: React.FC = () => {
     <div className="fleet-root synthetic-files-root">
       <div className="page-header">
         <div className="page-title-group">
-          <h1>SYNTHETIC FILES</h1>
+          <div style={{ display: 'flex', alignItems: 'center', gap: 12 }}>
+            <FileText size={22} className="violet-accent" />
+            <h1>SYNTHETIC FILES</h1>
+          </div>
           <span className="page-sub">
             {total} TOTAL · PAGE {page + 1} / {totalPages}
             {filtersActive ? ' · FILTERED' : ''}