Improve item detail view

- Separate page (permalink) for item details

- Use available space and hide search menu

- Disable item navigation links if there is nothing to go to

- Show notes more prominently and allow to hide them

modules/webapp/src/main/elm/Page.elm

@@ -10,6 +10,7 @@ module Page exposing
     , pageFromString
     , pageName
     , pageToString
+    , set
     , uploadId
     )
 
@@ -31,6 +32,7 @@ type Page
     | RegisterPage
     | UploadPage (Maybe String)
     | NewInvitePage
+    | ItemDetailPage String
 
 
 isSecured : Page -> Bool
@@ -63,6 +65,9 @@ isSecured page =
         UploadPage arg ->
             Util.Maybe.isEmpty arg
 
+        ItemDetailPage _ ->
+            True
+
 
 isOpen : Page -> Bool
 isOpen page =
@@ -114,6 +119,9 @@ pageName page =
                 Nothing ->
                     "Upload"
 
+        ItemDetailPage _ ->
+            "Item"
+
 
 loginPageReferrer : Page -> Maybe Page
 loginPageReferrer page =
@@ -169,6 +177,9 @@ pageToString page =
         NewInvitePage ->
             "/app/newinvite"
 
+        ItemDetailPage id ->
+            "/app/item/" ++ id
+
 
 pageFromString : String -> Maybe Page
 pageFromString str =
@@ -191,6 +202,11 @@ href page =
     Attr.href (pageToString page)
 
 
+set : Nav.Key -> Page -> Cmd msg
+set key page =
+    Nav.pushUrl key (pageToString page)
+
+
 goto : Page -> Cmd msg
 goto page =
     Nav.load (pageToString page)
@@ -215,6 +231,7 @@ parser =
         , Parser.map (\s -> UploadPage (Just s)) (s pathPrefix </> s "upload" </> string)
         , Parser.map (UploadPage Nothing) (s pathPrefix </> s "upload")
         , Parser.map NewInvitePage (s pathPrefix </> s "newinvite")
+        , Parser.map ItemDetailPage (s pathPrefix </> s "item" </> string)
         ]