diff --git a/app/src/main/java/com/m57/hermescontrol/data/model/SessionListResponse.kt b/app/src/main/java/com/m57/hermescontrol/data/model/SessionListResponse.kt
index 8b391ba0..4b299abc 100644
--- a/app/src/main/java/com/m57/hermescontrol/data/model/SessionListResponse.kt
+++ b/app/src/main/java/com/m57/hermescontrol/data/model/SessionListResponse.kt
@@ -123,7 +123,10 @@ data class SessionRenameRequest(
 @Serializable
 data class BulkDeleteRequest(
     val ids: List<String>,
-    val delete_all: Boolean = false,
+    // Destructive POSTs read the profile off the BODY (not the ?profile=
+    // query rewrite) — an unnamed bulk delete is refused with 400 on a
+    // multi-profile backend. Null stays valid for single-profile hosts.
+    val profile: String? = null,
 )
 
 @Serializable
@@ -134,5 +137,13 @@ data class BulkDeleteResponse(
 
 @Serializable
 data class PruneRequest(
-    val days: Int,
+    // Server contract: `older_than_days` (hermes_cli/web_models.py SessionPrune).
+    // The old `days` key was unknown to the backend, so the user's choice was
+    // silently dropped and the server pruned its own 90-day default.
+    @SerialName("older_than_days") val olderThanDays: Int,
+    // Destructive POSTs read the profile off the BODY (not the ?profile= query
+    // rewrite): on a multi-profile backend an unnamed prune is refused with
+    // 400 (web_routers/_common.py destructive_profile). Null stays valid for
+    // single-profile hosts.
+    val profile: String? = null,
 )
diff --git a/app/src/main/java/com/m57/hermescontrol/data/remote/ProfileScopeInterceptor.kt b/app/src/main/java/com/m57/hermescontrol/data/remote/ProfileScopeInterceptor.kt
index 3c407a83..3202cadc 100644
--- a/app/src/main/java/com/m57/hermescontrol/data/remote/ProfileScopeInterceptor.kt
+++ b/app/src/main/java/com/m57/hermescontrol/data/remote/ProfileScopeInterceptor.kt
@@ -33,6 +33,10 @@ object ProfileScopeInterceptor : Interceptor {
             // multi-profile host transcribes under the launch profile
             // (review, PR #1250).
             "/api/audio",
+            // Curator state is per profile (config-scoped reads) and the run
+            // trigger is privileged: `POST /api/curator/run` is refused with
+            // 400 on a multi-profile backend without ?profile=.
+            "/api/curator",
             "/api/config",
             "/api/credentials/pool",
             "/api/cron",
diff --git a/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsScreen.kt b/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsScreen.kt
index 5ea87d77..804446cf 100644
--- a/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsScreen.kt
+++ b/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsScreen.kt
@@ -66,6 +66,7 @@ import androidx.compose.material3.FilledTonalButton
 import androidx.compose.material3.FilterChip
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
@@ -507,6 +508,24 @@ fun SessionsScreen(
         // (The scaffold already applies top-bar padding via its inner Box, so we
         //  must NOT re-apply paddingValues here.)
         Column(modifier = Modifier.fillMaxSize()) {
+            // Prune can take a while on large histories — show it's working.
+            if (state.isPruning) {
+                Column(
+                    modifier =
+                        Modifier
+                            .fillMaxWidth()
+                            .padding(horizontal = spacing.md, vertical = spacing.sm)
+                            .testTag("sessions_pruning_indicator"),
+                    verticalArrangement = Arrangement.spacedBy(spacing.xs),
+                ) {
+                    Text(
+                        text = stringResource(R.string.sessions_pruning),
+                        style = MaterialTheme.typography.labelMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    LinearProgressIndicator(modifier = Modifier.fillMaxWidth())
+                }
+            }
             Row(
                 modifier =
                     Modifier
diff --git a/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsViewModel.kt b/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsViewModel.kt
index 87363b65..65cae410 100644
--- a/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsViewModel.kt
+++ b/app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsViewModel.kt
@@ -963,7 +963,13 @@ class SessionsViewModel(
             val result =
                 safeApiCall {
                     ApiClient.hermesApi.bulkDeleteSessions(
-                        body = BulkDeleteRequest(ids = ids),
+                        body =
+                            BulkDeleteRequest(
+                                ids = ids,
+                                // Destructive POSTs scope by BODY profile; the
+                                // ?profile= query rewrite never reaches them.
+                                profile = AuthManager.activeProfileId.value,
+                            ),
                     )
                 }
             when (result) {
@@ -1021,7 +1027,16 @@ class SessionsViewModel(
             val result =
                 safeApiCall {
                     ApiClient.hermesApi.pruneSessions(
-                        body = PruneRequest(days = days),
+                        body =
+                            PruneRequest(
+                                // The server model is `older_than_days`; the
+                                // old `days` key was silently ignored and the
+                                // backend pruned its own 90-day default.
+                                olderThanDays = days,
+                                // Destructive POSTs scope by BODY profile; the
+                                // ?profile= query rewrite never reaches them.
+                                profile = AuthManager.activeProfileId.value,
+                            ),
                     )
                 }
             when (result) {
diff --git a/app/src/main/res/values-ar/strings.xml b/app/src/main/res/values-ar/strings.xml
index 6ff8169f..4246ab8e 100644
--- a/app/src/main/res/values-ar/strings.xml
+++ b/app/src/main/res/values-ar/strings.xml
@@ -759,6 +759,7 @@
 <string name="sessions_prune_desc">حذف الجلسات الأقدم من عدد الأيام المحدد.</string>
 <string name="sessions_prune_days_label">حد الأيام</string>
 <string name="sessions_prune_confirm">تنقيح</string>
+<string name="sessions_pruning">جارٍ تنقيح الجلسات القديمة…</string>
 <string name="sessions_empty_cleanup_desc">فارغة</string>
 <string name="sessions_empty_cleanup_title">هل تريد حذف الجلسات الفارغة؟</string>
 <string name="sessions_empty_cleanup_message">حذف %1$d من الجلسات الفارغة. سيتم الاحتفاظ بالجلسات النشطة والمؤرشفة.</string>
diff --git a/app/src/main/res/values-ko/strings.xml b/app/src/main/res/values-ko/strings.xml
index 395700da..4a3e9465 100644
--- a/app/src/main/res/values-ko/strings.xml
+++ b/app/src/main/res/values-ko/strings.xml
@@ -646,6 +646,7 @@
     <string name="sessions_prune_desc">지정된 일수보다 오래된 세션을 삭제합니다.</string>
     <string name="sessions_prune_days_label">일수 기준</string>
     <string name="sessions_prune_confirm">정리</string>
+    <string name="sessions_pruning">오래된 세션 정리 중…</string>
     <string name="sessions_fork_indicator">분기된 세션</string>
     <string name="sessions_delete_title">세션 삭제?</string>
     <string name="sessions_delete_message">정말 \"%1$s\"을(를) 삭제하시겠습니까? 되돌릴 수 없습니다.</string>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 34212136..032fd94e 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -730,6 +730,7 @@
     <string name="sessions_prune_desc">删除早于指定天数的会话。</string>
     <string name="sessions_prune_days_label">天数阈值</string>
     <string name="sessions_prune_confirm">清理</string>
+    <string name="sessions_pruning">正在清理旧会话…</string>
     <string name="sessions_empty_cleanup_desc">空会话</string>
     <string name="sessions_empty_cleanup_title">删除空会话？</string>
     <string name="sessions_empty_cleanup_message">删除 %1$d 个空会话？活动与归档会话会被保留。</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 793ce2ba..a057be79 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -877,6 +877,7 @@
     <string name="sessions_prune_desc">Delete sessions older than the specified number of days.</string>
     <string name="sessions_prune_days_label">Days threshold</string>
     <string name="sessions_prune_confirm">Prune</string>
+    <string name="sessions_pruning">Pruning old sessions…</string>
     <string name="sessions_empty_cleanup_desc">Empty</string>
     <string name="sessions_empty_cleanup_title">Delete empty sessions?</string>
     <string name="sessions_empty_cleanup_message">Delete %1$d empty session(s). Active and archived sessions are kept.</string>
diff --git a/app/src/test/java/com/m57/hermescontrol/data/model/SessionDestructiveOpsSerializationTest.kt b/app/src/test/java/com/m57/hermescontrol/data/model/SessionDestructiveOpsSerializationTest.kt
new file mode 100644
index 00000000..a84f616a
--- /dev/null
+++ b/app/src/test/java/com/m57/hermescontrol/data/model/SessionDestructiveOpsSerializationTest.kt
@@ -0,0 +1,50 @@
+package com.m57.hermescontrol.data.model
+
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Test
+
+/**
+ * Wire-shape pins for the destructive session ops. The backend reads the
+ * profile off these request BODIES (`SessionPrune` / `BulkDeleteSessions`) —
+ * the `?profile=` query rewrite never reaches them — and its prune model is
+ * `older_than_days` (the old `days` key was silently ignored, leaving the
+ * server to prune its own 90-day default).
+ */
+class SessionDestructiveOpsSerializationTest {
+    private val json = Json { ignoreUnknownKeys = true }
+
+    @Test
+    fun pruneRequest_sendsServerFieldNames() {
+        val encoded = json.encodeToString(PruneRequest(olderThanDays = 7, profile = "work"))
+        val body = json.parseToJsonElement(encoded).jsonObject
+
+        assertEquals("7", body["older_than_days"]!!.jsonPrimitive.content)
+        assertEquals("work", body["profile"]!!.jsonPrimitive.content)
+        // The old key must be gone: the backend ignores it.
+        assertFalse(body.containsKey("days"))
+    }
+
+    @Test
+    fun pruneRequest_omitsProfileWhenUnnamed() {
+        val encoded = json.encodeToString(PruneRequest(olderThanDays = 30))
+        val body = json.parseToJsonElement(encoded).jsonObject
+
+        assertEquals("30", body["older_than_days"]!!.jsonPrimitive.content)
+        assertFalse(body.containsKey("profile"))
+    }
+
+    @Test
+    fun bulkDeleteRequest_carriesProfile() {
+        val encoded = json.encodeToString(BulkDeleteRequest(ids = listOf("a", "b"), profile = "work"))
+        val body = json.parseToJsonElement(encoded).jsonObject
+
+        assertEquals("work", body["profile"]!!.jsonPrimitive.content)
+        assertEquals(listOf("a", "b"), body["ids"]!!.jsonArray.map { it.jsonPrimitive.content })
+    }
+}