chore: transition to single-account system and migrate legacy data

- Remove all multi-account and guest-mode UI components (AuthScreen, GuestSyncPopup, dashboard banners).
- Refactor AuthManager to automatically login/create a single local user based on the OS username.
- Rewrite migration sweep to robustly merge all legacy guest and multi-account data into the active local profile.
- Overhaul SettingsPage to replace password change/logout with a simple username modifier.
- Bump version to 3.8.10-alpha.

Author: arshsisodiya

frontend/package.json

@@ -1,7 +1,7 @@
 {
     "name":  "stasis",
     "private":  true,
-    "version":  "3.8.10-alpha",
+    "version":  "3.8.11-alpha",
     "type":  "module",
     "scripts":  {
                     "dev":  "vite",

frontend/src-tauri/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "stasis"
-version = "3.8.10-alpha"
+version = "3.8.11-alpha"
 description = "Stasis Desktop App"
 authors = ["you"]
 edition = "2021"

frontend/src-tauri/Cargo.toml

@@ -1,7 +1,7 @@
 {
     "$schema":  "https://schema.tauri.app/config/2",
     "productName":  "Stasis",
-    "version":  "3.8.10-alpha",
+    "version":  "3.8.11-alpha",
     "identifier":  "com.arsh.stasis",
     "build":  {
                   "beforeDevCommand":  "npm run dev",

frontend/src-tauri/tauri.conf.json

@@ -4,7 +4,6 @@ import { invoke } from "@tauri-apps/api/core";
 import { load } from "@tauri-apps/plugin-store";
 import { useState, useEffect, useRef } from 'react';
 import { AuthProvider, useAuth } from './context/AuthContext';
-import AuthScreen from './pages/AuthScreen';
 
 /**
  * Startup transition flow:
@@ -35,7 +34,7 @@ function AppContent() {
   const [backendReady, setBackendReady] = useState(false);
   // Ref to hold prefetched data from the LoadingScreen during the auth-loading phase
   const cachedDataRef = useRef(null);
-  const { user, isGuest, loading: authLoading } = useAuth();
+  const { user, loading: authLoading } = useAuth();
 
   const doTransition = async (prefetchedData) => {
     setInitialData(prefetchedData || null);
@@ -67,37 +66,32 @@ function AppContent() {
     setTimeout(() => setStage("done"), 750);
   };
 
+
   // ── Effect: When authLoading flips to false AND backend is already ready,
   //    immediately start the dashboard transition (no second health-check needed).
   useEffect(() => {
-    if (!authLoading && (user || isGuest) && backendReady && stage === "idle") {
+    if (!authLoading && user && backendReady && stage === "idle") {
       doTransition(cachedDataRef.current);
     }
-  }, [authLoading, user, isGuest, backendReady]);
+  }, [authLoading, user, backendReady, stage]);
 
   // ── Show LoadingScreen while auth is still resolving ──
   // This runs the backend health-check polling concurrently with auth validation.
-  if (authLoading) {
+  if (authLoading || !user) {
     return (
       <LoadingScreen
         onReady={(data) => {
           // Backend is healthy — cache the data. We'll use it once auth resolves.
           cachedDataRef.current = data;
           setBackendReady(true);
-          // Note: we do NOT call doTransition here because we don't know yet
-          // whether auth will succeed (user) or fail (show AuthScreen).
         }}
       />
     );
   }
 
-  // ── Auth resolved: no valid user and not guest → show login screen ──
-  if (!user && !isGuest) {
-    return <AuthScreen />;
-  }
-
-  // ── Auth resolved: valid user or guest present ──
+  // ── Auth resolved: valid user present ──
   return (
+
     <>
       {/* Dashboard renders underneath as soon as the API is ready */}
       {stage !== "idle" && (

frontend/src/App.jsx

@@ -10,8 +10,6 @@ import DaySummary from "./pages/DaySummary";
 import { Skeleton, SkeletonCard, TabPanel, AppIcon } from "./shared/components";
 import { localYMD, fmtTime, fmtTimeFull } from "./shared/utils";
 import { useLiveClock, useVisibilityPolling } from "./shared/hooks";
-import { useAuth } from "./context/AuthContext";
-import GuestSyncPopup from "./components/GuestSyncPopup";
 
 // ─── useReducer — atomic state for all dashboard data ─────────────────────────
 
@@ -265,7 +263,6 @@ function trimDashboardCache(cache, keepDates = []) {
 
 export default function WellbeingDashboard({ onDisconnect, initialData = null }) {
   const BASE = import.meta.env.VITE_API_URL || "http://127.0.0.1:7432";
-  const { isGuest, logout } = useAuth();
 
   const [dashState, dispatch] = useReducer(dashReducer, {
     ...initialDashState,
@@ -597,34 +594,6 @@ export default function WellbeingDashboard({ onDisconnect, initialData = null })
         }
       `}</style>
 
-      {isGuest && (
-        <div style={{
-          position: "absolute", top: 0, left: 0, right: 0, zIndex: 10,
-          background: "rgba(248, 113, 113, 0.15)", borderBottom: "1px solid rgba(248, 113, 113, 0.3)",
-          backdropFilter: "blur(8px)", padding: "8px 24px",
-          display: "flex", alignItems: "center", justifyContent: "space-between",
-          fontSize: "12px", fontFamily: "'DM Sans', sans-serif"
-        }}>
-          <div style={{ display: "flex", alignItems: "center", gap: "8px", color: "#f8fafc" }}>
-            <span style={{ color: "#f87171" }}>●</span>
-            <strong>Guest Mode:</strong> Your data is not being saved to an account.
-          </div>
-          <button 
-            onClick={logout}
-            style={{
-              background: "transparent", border: "1px solid rgba(255,255,255,0.2)",
-              color: "#f8fafc", borderRadius: "6px", padding: "4px 12px",
-              cursor: "pointer", fontSize: "11px", fontWeight: 600,
-              transition: "background 0.2s"
-            }}
-            onMouseEnter={e => e.target.style.background = "rgba(255,255,255,0.1)"}
-            onMouseLeave={e => e.target.style.background = "transparent"}
-          >
-            Sign In
-          </button>
-        </div>
-      )}
-
       {/* ── AMBIENT ORBS — shift to indigo in historical mode ── */}
       <div className="orb-float" style={{
         position: "fixed", top: "-10%", left: "-5%", width: 500, height: 500,
@@ -661,8 +630,9 @@ export default function WellbeingDashboard({ onDisconnect, initialData = null })
       <div ref={scrollRef} className="db-scroll-wrapper"
         style={{ height: "100%", width: "100%", overflowY: "auto", overflowX: "hidden", position: "relative", zIndex: 4 }}>
         <div style={{
-          maxWidth: 1280, width: "100%", margin: "0 auto", padding: "28px 24px",
-          paddingTop: isGuest ? "48px" : "28px",
+          maxWidth: "1400px", margin: "0 auto", minHeight: "100vh", position: "relative",
+          paddingTop: "28px",
+          paddingLeft: "24px", paddingRight: "24px", paddingBottom: "40px",
           opacity: mounted ? 1 : 0, transform: mounted ? "none" : "translateY(20px)",
           transition: "opacity 0.7s ease, transform 0.7s ease",
         }}>
@@ -939,7 +909,6 @@ export default function WellbeingDashboard({ onDisconnect, initialData = null })
       {showSettings && showSettings !== "drawer" && (
         <SettingsPage key={showSettings} initialSection={showSettings} onClose={() => setShowSettings(null)} />
       )}
-      <GuestSyncPopup />
     </div>
   );
 }