Add Conditions page with live volcano and weather feeds

- Standalone full-screen page at /conditions
- Tiled grid layout with autoplaying video feeds
- USGS Kilauea webcams (V1cam, V2cam) via YouTube embeds
- Windy weather maps (local Hawaii + national US)
- Opens in new tab from dashboard nav

Closes #29

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

1 files changed, 13 insertions, 0 deletions

diff --git a/internal/handlers/handlers.go b/internal/handlers/handlers.go
index 366402e..5014f39 100644
--- a/internal/handlers/handlers.go
+++ b/internal/handlers/handlers.go
@@ -1274,6 +1274,19 @@ func (h *Handler) aggregateShoppingLists(ctx context.Context) []models.ShoppingS
 	return stores
 }
 
+// HandleTabConditions renders the Conditions tab with live feeds
+func (h *Handler) HandleTabConditions(w http.ResponseWriter, r *http.Request) {
+	HTMLResponse(w, h.templates, "conditions-tab", nil)
+}
+
+// HandleConditionsPage renders the standalone Conditions page with live feeds
+func (h *Handler) HandleConditionsPage(w http.ResponseWriter, r *http.Request) {
+	if err := h.templates.ExecuteTemplate(w, "conditions.html", nil); err != nil {
+		http.Error(w, "Failed to render conditions page", http.StatusInternalServerError)
+		log.Printf("Error rendering conditions page: %v", err)
+	}
+}
+
 // isActionableList returns true if the list name indicates an actionable list
 func isActionableList(name string) bool {
 	lower := strings.ToLower(name)