feat: expand companion platform, device controls, and memoir workflows

Add customer and operator login, BLE provisioning, device fleet controls, call memory, memoir generation, and refreshed family and maintenance portals. Include API contracts, migrations, firmware sources, tests, assets, and deployment documentation.

firmware/echoear-platform-agent/main/ble_name.h

@@ -0,0 +1,25 @@
+#ifndef VOICELINK_BLE_NAME_H
+#define VOICELINK_BLE_NAME_H
+
+#include <stdio.h>
+#include <string.h>
+
+// Legacy scan response: 31 bytes minus AD length/type = 29 name bytes.
+// "vl-" (3) + model (<=17 UTF-8 bytes) + "-" (1) + ID (8).
+#define VOICELINK_BLE_NAME_CAPACITY 30
+static inline void voicelink_ble_name(char out[VOICELINK_BLE_NAME_CAPACITY],
+                                     const char *model, const char *factory_id)
+{
+    size_t model_len = strlen(model);
+    if (model_len > 17) {
+        model_len = 17;
+        // Do not truncate inside a UTF-8 code point.
+        while (model_len && ((unsigned char)model[model_len] & 0xc0) == 0x80)
+            model_len--;
+    }
+    size_t id_len = strlen(factory_id);
+    const char *suffix = id_len >= 8 ? factory_id + id_len - 8 : factory_id;
+    snprintf(out, VOICELINK_BLE_NAME_CAPACITY, "vl-%.*s-%s",
+             (int)model_len, model, suffix);
+}
+#endif