feat(chat): /stop also kills background processes like desktop (#1409)

app/src/main/java/com/m57/hermescontrol/data/ws/WsMethods.kt

@@ -94,6 +94,9 @@ object WsMethods {
     /** Kill a single background process (scoped to the active session). */
     const val PROCESS_KILL = "process.kill"
 
+    /** Kill every background process in the gateway registry (`/stop`, global). */
+    const val PROCESS_STOP = "process.stop"
+
     // ── Subagents (issue #1089) ───────────────────────────────────────────
 
     /** List active subagents and delegations for a session. */

app/src/main/java/com/m57/hermescontrol/data/ws/contract/ProcessStop.kt

@@ -0,0 +1,15 @@
+package com.m57.hermescontrol.data.ws.contract
+
+import kotlinx.serialization.Serializable
+
+/**
+ * `process.stop` kills every background process in the gateway registry (the desktop `/stop` second half). Desktop
+ * sends `{}`: the backend call is global, so no `session_id` or `profile` override is sent.
+ */
+@Serializable
+data object ProcessStopParams
+
+@Serializable
+data class ProcessStopResult(
+    val killed: Int? = null,
+)

app/src/main/java/com/m57/hermescontrol/data/ws/contract/RpcMethod.kt

@@ -363,6 +363,13 @@ object RpcMethods {
             JsonElement.serializer(),
         )
 
+    val PROCESS_STOP: RpcMethod<ProcessStopParams, ProcessStopResult> =
+        RpcMethod(
+            WsMethods.PROCESS_STOP,
+            ProcessStopParams.serializer(),
+            ProcessStopResult.serializer(),
+        )
+
     // Passthrough JsonElement results: callers keep their existing legacy decoders.
     val PLUGINS_MANAGE: RpcMethod<PluginsManageParams, JsonElement> =
         RpcMethod(
@@ -514,6 +521,7 @@ object RpcMethods {
             SUBAGENT_TAIL,
             PROCESS_LIST,
             PROCESS_KILL,
+            PROCESS_STOP,
             PLUGINS_MANAGE,
             PROJECTS_LIST,
             PROFILES_LIST,