feat: rebuild navbar with NB structure — Sis brand, nav links with nb-navbar-link class inside nb-navbar-item wrappers, user initials avatar

- UserSession now carries usDisplayName for extracting initials (current: JB)
- Nav items: Today (was Dashboard), Chores, Activity, Household
- Removed Logout link; added black user avatar circle with initials
- routeLink generates proper <li class='nb-navbar-item'><a class='nb-navbar-link'> structure
- All pages wrapped with pageLayout to render shared navbar shell
- Login/Signup save display name into session on authentication

src/Sis/Page/Activity.hs

@@ -101,7 +101,7 @@ page = do
         Just us -> do
             hhs <- getUserHouseholds (UserId (usUserId us))
             case hhs of
-                [] -> pure $ hyper ActivityPage $ el "No households"
+                [] -> pure $ hyper ActivityPage $ pageLayout us $ el "No households"
                 (h : _) -> do
                     log <- getActivityLog (unHouseholdId (householdId h)) 1 20
-                    pure $ hyper ActivityPage $ activityView log
+                    pure $ hyper ActivityPage $ pageLayout us $ activityView log

src/Sis/Page/Chores.hs

@@ -98,7 +98,7 @@ page = do
         Just us -> do
             hhs <- getUserHouseholds (UserId (usUserId us))
             case hhs of
-                [] -> pure $ hyper ChoresPage $ el "No households"
+                [] -> pure $ hyper ChoresPage $ pageLayout us $ el "No households"
                 (h : _) -> do
                     chores' <- getChores (unHouseholdId (householdId h))
-                    pure $ hyper ChoresPage $ choresView chores'
+                    pure $ hyper ChoresPage $ pageLayout us $ choresView chores'

src/Sis/Page/Dashboard.hs

@@ -115,7 +115,7 @@ page = do
             today <- liftIO (utctDay <$> getCurrentTime)
             hhs <- getUserHouseholds (UserId (usUserId us))
             case hhs of
-                [] -> pure $ hyper DashboardPage $ el "No households"
+                [] -> pure $ hyper DashboardPage $ pageLayout us $ el "No households"
                 (h : _) -> do
                     dash <- getDashboard (unHouseholdId (householdId h)) today
-                    pure $ hyper DashboardPage $ dashboardView dash
+                    pure $ hyper DashboardPage $ pageLayout us $ dashboardView dash

src/Sis/Page/Household.hs

@@ -123,9 +123,9 @@ page = do
         Just us -> do
             hhs <- getUserHouseholds (UserId (usUserId us))
             case hhs of
-                [] -> pure $ hyper HouseholdPage noHouseholdView
+                [] -> pure $ hyper HouseholdPage $ pageLayout us noHouseholdView
                 (h : _) -> do
                     let hid = unHouseholdId (householdId h)
                     mems <- getMembers hid
                     invs <- getInvites hid
-                    pure $ hyper HouseholdPage $ householdView h mems invs
+                    pure $ hyper HouseholdPage $ pageLayout us $ householdView h mems invs

src/Sis/Page/Login.hs

@@ -40,7 +40,7 @@ instance (DB :> es, IOE :> es) => HyperView LoginPage es where
         case mUser of
             Just u
                 | verifyPassword (lfPassword formData') (userPasswordHash u) -> do
-                    saveSession (UserSession (unUserId (userId u)))
+                    saveSession (UserSession (unUserId (userId u)) (userDisplayName u))
                     pure loginSuccessView
             _ -> pure (loginView (Just "Invalid email or password"))
     update Noop = pure (loginView Nothing)

src/Sis/Page/Signup.hs

@@ -48,7 +48,7 @@ instance (DB :> es, IOE :> es) => HyperView SignupPage es where
                             Nothing -> do
                                 pwHash <- liftIO (hashPassword (sfPassword form))
                                 uid <- createUser (sfDisplayName form) (sfEmail form) pwHash
-                                saveSession (UserSession (unUserId uid))
+                                saveSession (UserSession (unUserId uid) (sfDisplayName form))
                                 pure signupSuccessView
 
 signupSuccessView :: View SignupPage ()

src/Sis/View/Layout.hs

@@ -6,25 +6,29 @@
 module Sis.View.Layout (
     documentHead,
     navbar,
+    pageLayout,
     UserSession (..),
 ) where
 
 import Data.Aeson
 import Data.Default
 import Data.Text (Text)
+import Data.Text qualified as T
 import GHC.Generics (Generic)
 
 import Sis.Route
 import Sis.Style (nbButtonDefaultClass, nbHeadingClass, nbNavbarClass, nbNavbarLinkClass)
 import Web.Hyperbole
+import Web.Hyperbole.Data.URI (uriToText)
 import Web.Hyperbole.Effect.Session
 
 ----------------------------------------------------------------------
 -- Session
 ----------------------------------------------------------------------
 
-newtype UserSession = UserSession
+data UserSession = UserSession
     { usUserId :: Int
+    , usDisplayName :: Text
     }
     deriving stock (Show, Eq, Generic)
     deriving anyclass (FromJSON, ToJSON)
@@ -34,7 +38,7 @@ instance Session UserSession where
     cookieSecure = False
 
 instance Default UserSession where
-    def = UserSession 0
+    def = UserSession 0 ""
 
 ----------------------------------------------------------------------
 -- Document Head
@@ -58,17 +62,31 @@ documentHead = do
 -- Navbar
 ----------------------------------------------------------------------
 
-navbar :: View ctx ()
+navbar :: UserSession -> View ctx ()
-navbar = do
+navbar us = do
     el @ att "class" nbNavbarClass $ do
-        el @ att "class" "nb-navbar-brand" @ att "style" "font-weight:700" $ text "Sis"
+        tag "a" @ att "class" "nb-navbar-brand" . att "href" (uriToText (routeUri RDashboard)) $ text "Sis"
         el @ att "class" "nb-navbar-nav" $ do
-            routeLink RDashboard "Dashboard"
+            routeLink RDashboard "Today"
             routeLink RChores "Chores"
-            routeLink RHousehold "Household"
             routeLink RActivity "Activity"
-            routeLink RLogin "Logout"
+            routeLink RHousehold "Household"
+        el @ att "class" "nb-navbar-avatar" @ att "style" "width:2.5rem;height:2.5rem;border-radius:50%;background:#000;color:#fff;display:flex;align-items:center;justify-content:center;font-family:'Lexend Mega','Public Sans',sans-serif;font-weight:900;font-size:0.85rem;flex-shrink:0" $
+            text (initials (usDisplayName us))
 
 routeLink :: (Route r) => r -> Text -> View ctx ()
 routeLink rt lbl = do
-    el @ att "class" nbNavbarLinkClass $ route rt $ text lbl
+    tag "li" @ att "class" "nb-navbar-item" $ do
+        tag "a" @ att "class" nbNavbarLinkClass . att "href" (uriToText (routeUri rt)) $ text lbl
+
+-- | Extract up to 2 initials from a display name
+initials :: Text -> Text
+initials displayName =
+    let ws = map (T.take 1) (T.words displayName)
+     in T.toUpper (T.take 2 (T.concat ws))
+
+-- | Wrap content in a shared page shell (navbar + container)
+pageLayout :: UserSession -> View ctx () -> View ctx ()
+pageLayout us body = do
+    navbar us
+    body