Add finalized navigation menu (F3)

- Dashboard link (all authenticated users)
- Spieltage, Personen (club-specific, require selected club)
- Stammdaten with Kostenvorlagen (ClubEditor+)
- Administration section with Vereine/Benutzer (SuperAdmin)
- Profile link for authenticated users

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/Koogle.Web/Components/Layout/NavMenu.razor

@@ -1,23 +1,54 @@
-@inherits FluxorComponent
+@using Koogle.Web.Store.ClubState
+@inherits FluxorComponent
 
 @inject IState<AuthState> AuthState
+@inject IState<ClubState> ClubState
 @inject NavigationManager NavigationManager
 
 <MudNavMenu>
+    @* Dashboard - visible to all authenticated users *@
+    <MudNavLink Href="/"
+                Match="NavLinkMatch.All"
+                Icon="@Icons.Material.Filled.Dashboard">
+        Dashboard
+    </MudNavLink>
+
+    @if (AuthState.Value.IsAuthenticated && HasSelectedClub)
+    {
+        @* Club-specific navigation - requires selected club *@
+        <MudNavLink Href="/days"
+                    Match="NavLinkMatch.Prefix"
+                    Icon="@Icons.Material.Filled.CalendarMonth">
+            Spieltage
+        </MudNavLink>
+
+        <MudNavLink Href="/persons"
+                    Match="NavLinkMatch.Prefix"
+                    Icon="@Icons.Material.Filled.Groups">
+            Personen
+        </MudNavLink>
+
+        @if (AuthState.Value.IsClubEditor || AuthState.Value.IsSuperAdmin)
+        {
+            <MudNavGroup Title="Stammdaten"
+                         Icon="@Icons.Material.Filled.Settings"
+                         Expanded="false">
+                <MudNavLink Href="/expenses"
+                            Match="NavLinkMatch.Prefix"
+                            Icon="@Icons.Material.Filled.Receipt">
+                    Kostenvorlagen
+                </MudNavLink>
+            </MudNavGroup>
+        }
+    }
+
     @if (AuthState.Value.IsClubEditor || AuthState.Value.IsSuperAdmin)
     {
-        @* // Tage und Auswertungen des ausgewählten Vereins *@
-
-
         <MudDivider Class="my-2" />
 
         <MudNavGroup Title="Administration"
                      Icon="@Icons.Material.Filled.AdminPanelSettings"
                      Expanded="false">
-
-            @* // Stammdaten des ausgewählten Vereins *@
-
-            @* // mandantenübergreifende Verwaltung *@
             @if (AuthState.Value.IsSuperAdmin)
             {
                 <MudNavLink Href="/admin/clubs"
@@ -31,11 +62,23 @@
                     Benutzer
                 </MudNavLink>
             }
-
         </MudNavGroup>
     }
+
+    <MudDivider Class="my-2" />
+
+    @* Profile - visible to all authenticated users *@
+    @if (AuthState.Value.IsAuthenticated)
+    {
+        <MudNavLink Href="/profile"
+                    Match="NavLinkMatch.Prefix"
+                    Icon="@Icons.Material.Filled.Person">
+            Profil
+        </MudNavLink>
+    }
 </MudNavMenu>
 
 @code {
-
+    private bool HasSelectedClub => ClubState.Value.SelectedClub != null ||
+        AuthState.Value.CurrentUser?.ClubMemberships?.Any(c => c.IsDefault) == true;
 }