fix(dashboard): swap Analytics/Monitor tab order, shrink Sagi avatar size

Sagi avatar 90->68px, tab buttons render Analytics before Monitor.

client/src/components/Sagi/SagiAvatar.tsx

@@ -76,7 +76,7 @@ if (typeof window !== "undefined") {
   });
 }
 
-export function SagiAvatar({ mood, reducedMotion, size = 90 }: SagiAvatarProps) {
+export function SagiAvatar({ mood, reducedMotion, size = 68 }: SagiAvatarProps) {
   const rootRef = useRef<SVGSVGElement | null>(null);
   const rafRef = useRef<number>();
   const [pupil, setPupil] = useState({ x: 0, y: 0 });

client/src/components/Sagi/useSagiPosition.ts

@@ -74,7 +74,7 @@ import { sagiPrefs, type SagiPos } from "./prefs";
 import type { PointerEvent as ReactPointerEvent } from "react";
 
 // Avatar footprint + edge gap, in px. SIZE matches SagiAvatar's default size.
-export const SAGI_SIZE = 90;
+export const SAGI_SIZE = 68;
 export const SAGI_MARGIN = 16;
 const DRAG_THRESHOLD = 5;