feat: Telegram fleet alerts, forge sigil scramble, UI polish, agent ops

- Calibrate: per-event Telegram/SMTP toggles, test notification, chat ID help
- Notify on agent connect/reconnect, offline/hashrate/rejection, forge complete
- Sigil scramble post-forge uniquification and Dispense Reveal ceremony
- Full system check, desktop push, BITS/host-binary persistence, Path Tracer
- Dashboard/Crucible visual polish, haptics, sacred geometry, mobile nav
- README documents alerts, sigil scramble, and pack-usb workflow
- USB bundle repacked via pack-usb.bat (AetherForge.exe + synced agent source)

server/web/src/context/VisualEffectsContext.tsx

@@ -0,0 +1,53 @@
+import React, { createContext, useCallback, useContext, useEffect, useMemo, useState } from 'react';
+import {
+  dispatchVisualPrefsChange,
+  loadGlowParticlesEnabled,
+  saveGlowParticlesEnabled,
+  VISUAL_PREFS_EVENT,
+} from '../visual/visualPrefs';
+
+type VisualEffectsContextValue = {
+  glowParticles: boolean;
+  setGlowParticles: (v: boolean) => void;
+};
+
+const VisualEffectsContext = createContext<VisualEffectsContextValue | null>(null);
+
+export function VisualEffectsProvider({ children }: { children: React.ReactNode }) {
+  const [glowParticles, setGlowState] = useState(loadGlowParticlesEnabled);
+
+  const setGlowParticles = useCallback((v: boolean) => {
+    saveGlowParticlesEnabled(v);
+    setGlowState(v);
+    dispatchVisualPrefsChange();
+  }, []);
+
+  useEffect(() => {
+    const sync = () => setGlowState(loadGlowParticlesEnabled());
+    window.addEventListener(VISUAL_PREFS_EVENT, sync);
+    return () => window.removeEventListener(VISUAL_PREFS_EVENT, sync);
+  }, []);
+
+  const value = useMemo(
+    () => ({ glowParticles, setGlowParticles }),
+    [glowParticles, setGlowParticles]
+  );
+
+  return (
+    <VisualEffectsContext.Provider value={value}>{children}</VisualEffectsContext.Provider>
+  );
+}
+
+export function useVisualEffects(): VisualEffectsContextValue {
+  const ctx = useContext(VisualEffectsContext);
+  if (!ctx) {
+    return {
+      glowParticles: loadGlowParticlesEnabled(),
+      setGlowParticles: (v) => {
+        saveGlowParticlesEnabled(v);
+        dispatchVisualPrefsChange();
+      },
+    };
+  }
+  return ctx;
+}