feat(sessions): show live status for active sessions in History (#1101) (#1104)

app/src/main/java/com/m57/hermescontrol/data/model/SessionLiveStatus.kt

@@ -0,0 +1,41 @@
+package com.m57.hermescontrol.data.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * High-level live status for a session in History.
+ */
+enum class SessionLiveStatus {
+    WORKING,
+    WAITING,
+}
+
+/**
+ * RPC response from `session.active_list`.
+ */
+@Serializable
+data class ActiveSessionsResponse(
+    val sessions: List<ActiveSessionItem> = emptyList(),
+)
+
+/**
+ * Individual item in `session.active_list`.
+ */
+@Serializable
+data class ActiveSessionItem(
+    val id: String? = null,
+    @SerialName("session_key")
+    val sessionKey: String? = null,
+    val status: String? = null,
+    @SerialName("last_active")
+    val lastActive: Double? = null,
+)
+
+/**
+ * Parsed authoritative snapshot of live sessions.
+ */
+data class LiveSessionSnapshot(
+    val statusByStoredId: Map<String, SessionLiveStatus> = emptyMap(),
+    val storedIdByRuntimeId: Map<String, String> = emptyMap(),
+)