diff --git a/src/modules/activity/domain/entities/activity-item.entity.ts b/src/modules/activity/domain/entities/activity-item.entity.ts
index a918ddd6..5f7ca83b 100644
--- a/src/modules/activity/domain/entities/activity-item.entity.ts
+++ b/src/modules/activity/domain/entities/activity-item.entity.ts
@@ -27,6 +27,12 @@ export interface ActivityActor {
 export interface ActivityTarget {
   type: string;
   id: string;
+  /**
+   * #144: arah pencarian search-miss. `lemma` = kata Sambas dicari,
+   * `translation` = kata Indonesia dicari. Null untuk kind lain - mobile
+   * memakai ini agar prefill form usul mengisi field yang benar.
+   */
+  direction?: 'lemma' | 'translation' | null;
 }
 
 export interface ActivityItem {
diff --git a/src/modules/activity/infrastructure/activity-event-feed.repository.impl.ts b/src/modules/activity/infrastructure/activity-event-feed.repository.impl.ts
index f75e02f7..f088dd17 100644
--- a/src/modules/activity/infrastructure/activity-event-feed.repository.impl.ts
+++ b/src/modules/activity/infrastructure/activity-event-feed.repository.impl.ts
@@ -147,6 +147,8 @@ interface FeedRow {
   actorAvatarUrl: string | null;
   actorDeletedAt: Date | null;
   missTerm: string | null;
+  /** #144: arah search-miss untuk di-wirer ke target.direction di feed. */
+  missDirection: string | null;
   voteValue: number | null;
 }
 
@@ -354,6 +356,8 @@ export class ActivityEventFeedRepositoryImpl {
         // search_miss: term body feed; guard kind supaya kolisi id antar
         // tabel (ULID) tak pernah match utk kind lain.
         missTerm: searchMisses.term,
+        // #144: arah search-miss (term Indonesia vs kata Sambas).
+        missDirection: searchMisses.direction,
         // fallback arah vote utk event lama tanpa payload (#94).
         voteValue: votes.value,
       })
@@ -576,7 +580,11 @@ export class ActivityEventFeedRepositoryImpl {
 
   private targetFor(
     kind: ActivityEventKind,
-    row: { targetId: string | null; targetWordId: string | null },
+    row: {
+      targetId: string | null;
+      targetWordId: string | null;
+      missDirection: string | null;
+    },
     word: { id: string; lemma: string } | null,
   ): ActivityItem['target'] {
     switch (kind) {
@@ -600,7 +608,17 @@ export class ActivityEventFeedRepositoryImpl {
       case 'discussion_created':
         return row.targetId ? { type: 'discussion', id: row.targetId! } : null;
       case 'search_miss':
-        return row.targetId ? { type: 'search_miss', id: row.targetId! } : null;
+        return row.targetId
+          ? {
+              type: 'search_miss',
+              id: row.targetId!,
+              // #144: arah pencarian untuk prefill form usul di mobile.
+              direction:
+                row.missDirection === 'lemma' || row.missDirection === 'translation'
+                  ? row.missDirection
+                  : null,
+            }
+          : null;
       case 'user_joined':
         return row.targetId ? { type: 'user', id: row.targetId! } : null;
       case 'announcement':
diff --git a/src/modules/activity/infrastructure/activity.repository.impl.ts b/src/modules/activity/infrastructure/activity.repository.impl.ts
index 3b6fcd38..b5c6ff68 100644
--- a/src/modules/activity/infrastructure/activity.repository.impl.ts
+++ b/src/modules/activity/infrastructure/activity.repository.impl.ts
@@ -618,6 +618,11 @@ export class ActivityRepositoryImpl implements ActivityRepository {
       target: {
         type: 'search_miss',
         id: row.id,
+        // #144: arah pencarian untuk prefill form usul di mobile.
+        direction:
+          row.direction === 'lemma' || row.direction === 'translation'
+            ? row.direction
+            : null,
       },
     }));
   }
diff --git a/src/modules/activity/presentation/v1/validators/activity.validator.ts b/src/modules/activity/presentation/v1/validators/activity.validator.ts
index 9fadd8f9..254a0fad 100644
--- a/src/modules/activity/presentation/v1/validators/activity.validator.ts
+++ b/src/modules/activity/presentation/v1/validators/activity.validator.ts
@@ -33,6 +33,8 @@ const activityTargetSchema = z
   .object({
     type: z.string(),
     id: z.string(),
+    /** #144: arah search-miss untuk prefill form usul (null = kind lain). */
+    direction: z.enum(['lemma', 'translation']).nullable().optional(),
   })
   .nullable();