Show date on Today/Tomorrow tabs and remove table headings

Tabs now display the date (e.g. "Today 2026-02-14"). Removed redundant
"Today — DK1" / "Tomorrow — DK1" headings from the price tables.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/clj/pmagnus/elprice/web/routes/ui.clj

@@ -9,10 +9,12 @@
    [reitit.ring.middleware.muuntaja :as muuntaja]
    [reitit.ring.middleware.parameters :as parameters])
   (:import
-   [java.time LocalDateTime]
+   [java.time LocalDateTime ZoneId]
    [java.time.format DateTimeFormatter]))
 
+(def ^:private dk-zone (ZoneId/of "Europe/Copenhagen"))
 (def ^:private hour-fmt (DateTimeFormatter/ofPattern "HH:00"))
+(def ^:private date-fmt (DateTimeFormatter/ofPattern "yyyy-MM-dd"))
 
 (defn- ->ldt [time-dk]
   (cond
@@ -60,9 +62,8 @@
          [:span (format "%02d:%02d" hour (.getMinute (->ldt (:time_dk q))))]
          [:span {:class "font-mono"} (format-ore (:price_dkk q))]])]]))
 
-(defn- price-table [title prices]
-  [:div {:class "mt-6"}
-   [:h2 {:class "text-lg font-semibold text-gray-900 mb-2"} title]
+(defn- price-table [prices]
+  [:div
    (if (seq prices)
      [:div
       (for [[hour quarters] (group-by-hour prices)]
@@ -79,25 +80,26 @@
   (str tab-base "border-gray-200 bg-gray-100 text-gray-500 hover:text-gray-700 cursor-pointer"))
 
 (defn- tabs [active-tab]
+  (let [today    (java.time.LocalDate/now dk-zone)
+        tomorrow (.plusDays today 1)]
     [:div {:class "flex gap-1 mt-4"}
      [:button {:class (if (= active-tab :today) tab-active tab-inactive)
                :hx-get "/prices/today"
                :hx-target "#price-panel"
                :hx-swap "innerHTML"}
-    "Today"]
+      (str "Today " (.format today date-fmt))]
      [:button {:class (if (= active-tab :tomorrow) tab-active tab-inactive)
                :hx-get "/prices/tomorrow"
                :hx-target "#price-panel"
                :hx-swap "innerHTML"}
-    "Tomorrow"]])
+      (str "Tomorrow " (.format tomorrow date-fmt))]]))
 
 (defn- price-content [tab prices]
-  (let [title (if (= tab :today) "Today — DK1" "Tomorrow — DK1")]
   [:div
    (tabs tab)
    [:div {:id "price-content"
           :class "border-2 border-blue-400 rounded-b-lg rounded-tr-lg p-4 bg-white"}
-      (price-table title prices)]]))
+    (price-table prices)]])
 
 (defn home [query-fn request]
   (prices/fetch-and-save! query-fn)