Add preset polish and broadcast metadata (fw 0.8.0).

Ship station reorder, DAB playing ids in presets, RDS PS/RT and DAB DLS in tuner status, Si4684 data-service read, host tests, and UI now-playing lines.

Co-authored-by: Cursor <cursoragent@cursor.com>

Software/components/services/station/include/station/StationService.hpp

@@ -102,6 +102,21 @@ public:
     [[nodiscard]] std::expected<void, core::StationListError> removeAt(
         std::size_t index);
 
+    /**
+     * @brief    reorder — move a preset within the list and persist.
+     *
+     * @dname    reorder
+     * @param    fromIndex  Current list position.
+     * @param    toIndex    Target list position.
+     * @return   Ok on success, or StationListError.
+     * @pubstate mutates list_ and NVS on success.
+     *
+     * @author   Michele Bigi
+     * @date     2026-07-06
+     */
+    [[nodiscard]] std::expected<void, core::StationListError> reorder(
+        std::size_t fromIndex, std::size_t toIndex);
+
     /**
      * @brief    tuneToIndex — recall a saved preset on the tuner.
      *

Software/components/services/station/src/StationService.cpp

@@ -62,8 +62,8 @@ std::expected<void, core::StationListError> StationService::add(
         return added;
     }
     if (auto saved = persist(); !saved) {
-        list_.removeAt(list_.stations().size() - 1U);
-        return std::unexpected(core::StationListError::Full);
+        (void)list_.removeAt(list_.stations().size() - 1U);
+        return std::unexpected(core::StationListError::PersistFailed);
     }
     return {};
 }
@@ -75,6 +75,22 @@ std::expected<void, core::StationListError> StationService::removeAt(
         return removed;
     }
     if (auto saved = persist(); !saved) {
+        return std::unexpected(core::StationListError::PersistFailed);
+    }
+    return {};
+}
+
+std::expected<void, core::StationListError> StationService::reorder(
+    std::size_t fromIndex,
+    std::size_t toIndex)
+{
+    if (auto moved = list_.move(fromIndex, toIndex); !moved) {
+        return moved;
+    }
+    if (auto saved = persist(); !saved) {
+        if (list_.move(toIndex, fromIndex)) {
+            return std::unexpected(core::StationListError::PersistFailed);
+        }
         return std::unexpected(core::StationListError::NotFound);
     }
     return {};