Alpha: eliminar referencias Teloprax + dashboard estilo shadcn demo

- Sidebar: logo 'A', título Alpha / KAPPA Hub
- Login: icono Alpha, sin branding Teloprax
- Dashboard rediseñado: 4 stats cards + historia clínica + actividad + tabla
- Theme: default shadcn-vue (colores demo page)
- Favicon: 'A' sobre fondo neutral
- Eliminado NavMain.vue no usado

src/views/LoginView.vue

@@ -19,34 +19,22 @@ async function handleLogin() {
   <div class="flex min-h-svh flex-col items-center justify-center bg-background p-6">
     <Card class="w-full max-w-[400px]">
       <CardHeader class="text-center pb-4">
-        <div class="flex items-center justify-center gap-1.5 mb-3">
-          <span class="block rounded-full border-2 border-primary opacity-35 w-[10px] h-[10px]" />
-          <span class="block rounded-full border-2 border-primary opacity-65 w-[14px] h-[14px]" />
-          <span class="block rounded-full bg-primary w-[18px] h-[18px]" />
+        <div class="flex aspect-square size-12 items-center justify-center rounded-xl bg-primary text-primary-foreground mx-auto mb-3">
+          <span class="font-bold text-xl">A</span>
         </div>
-        <CardTitle class="font-display text-2xl font-bold">teloprax</CardTitle>
-        <CardDescription class="text-xs mt-1">ideas en progreso</CardDescription>
+        <CardTitle class="text-2xl font-bold tracking-tight">Alpha</CardTitle>
+        <CardDescription class="text-xs mt-1">KAPPA Hub</CardDescription>
       </CardHeader>
 
       <CardContent>
         <form @submit.prevent="handleLogin" class="flex flex-col gap-4">
           <div class="space-y-1.5">
             <label class="text-xs font-medium text-muted-foreground uppercase tracking-wider">Email</label>
-            <Input
-              v-model="email"
-              type="email"
-              placeholder="ricardo@..."
-              autocomplete="email"
-            />
+            <Input v-model="email" type="email" placeholder="ricardo@..." autocomplete="email" />
           </div>
           <div class="space-y-1.5">
             <label class="text-xs font-medium text-muted-foreground uppercase tracking-wider">Contraseña</label>
-            <Input
-              v-model="password"
-              type="password"
-              placeholder="••••••••"
-              autocomplete="current-password"
-            />
+            <Input v-model="password" type="password" placeholder="••••••••" autocomplete="current-password" />
           </div>
 
           <div v-if="auth.error" class="text-xs text-destructive bg-destructive/10 rounded-md px-3 py-2">
@@ -54,11 +42,11 @@ async function handleLogin() {
           </div>
 
           <Button type="submit" class="w-full mt-2" :disabled="auth.loading">
-            {{ auth.loading ? 'Ingresando...' : 'Iniciar diagnóstico' }}
+            {{ auth.loading ? 'Ingresando...' : 'Iniciar sesión' }}
           </Button>
         </form>
 
-        <p class="text-center text-[11px] text-muted-foreground/50 mt-6">
+        <p class="text-center text-[11px] text-muted-foreground/40 mt-6">
           kappa.lambdaanalytics.co
         </p>
       </CardContent>