Enrich names-based contact pane a bit

app/models.py

@@ -225,6 +225,14 @@ class ContactDetail(BaseModel):
     nearest_repeaters: list[NearestRepeater] = Field(default_factory=list)
 
 
+class NameOnlyContactDetail(BaseModel):
+    """Channel activity summary for a sender name that is not tied to a known key."""
+
+    name: str
+    channel_message_count: int = 0
+    most_active_rooms: list[ContactActiveRoom] = Field(default_factory=list)
+
+
 class Channel(BaseModel):
     key: str = Field(description="Channel key (32-char hex)")
     name: str

app/repository/messages.py

@@ -545,6 +545,16 @@ class MessageRepository:
         row = await cursor.fetchone()
         return row["cnt"] if row else 0
 
+    @staticmethod
+    async def count_channel_messages_by_sender_name(sender_name: str) -> int:
+        """Count channel messages attributed to a display name."""
+        cursor = await db.conn.execute(
+            "SELECT COUNT(*) as cnt FROM messages WHERE type = 'CHAN' AND sender_name = ?",
+            (sender_name,),
+        )
+        row = await cursor.fetchone()
+        return row["cnt"] if row else 0
+
     @staticmethod
     async def get_channel_stats(conversation_key: str) -> dict:
         """Get channel message statistics: time-windowed counts, first message, unique senders, top senders.
@@ -632,3 +642,24 @@ class MessageRepository:
         )
         rows = await cursor.fetchall()
         return [(row["conversation_key"], row["channel_name"], row["cnt"]) for row in rows]
+
+    @staticmethod
+    async def get_most_active_rooms_by_sender_name(
+        sender_name: str, limit: int = 5
+    ) -> list[tuple[str, str, int]]:
+        """Get channels where a display name has sent the most messages."""
+        cursor = await db.conn.execute(
+            """
+            SELECT m.conversation_key, COALESCE(c.name, m.conversation_key) AS channel_name,
+                   COUNT(*) AS cnt
+            FROM messages m
+            LEFT JOIN channels c ON m.conversation_key = c.key
+            WHERE m.type = 'CHAN' AND m.sender_name = ?
+            GROUP BY m.conversation_key
+            ORDER BY cnt DESC
+            LIMIT ?
+            """,
+            (sender_name, limit),
+        )
+        rows = await cursor.fetchall()
+        return [(row["conversation_key"], row["channel_name"], row["cnt"]) for row in rows]

app/routers/contacts.py

@@ -14,6 +14,7 @@ from app.models import (
     ContactRoutingOverrideRequest,
     ContactUpsert,
     CreateContactRequest,
+    NameOnlyContactDetail,
     NearestRepeater,
     TraceResponse,
 )
@@ -249,6 +250,29 @@ async def get_contact_detail(public_key: str) -> ContactDetail:
     )
 
 
+@router.get("/name-detail", response_model=NameOnlyContactDetail)
+async def get_name_only_contact_detail(
+    name: str = Query(min_length=1, max_length=200),
+) -> NameOnlyContactDetail:
+    """Get channel activity summary for a sender name without a resolved key."""
+    normalized_name = name.strip()
+    if not normalized_name:
+        raise HTTPException(status_code=400, detail="name is required")
+
+    chan_count = await MessageRepository.count_channel_messages_by_sender_name(normalized_name)
+    active_rooms_raw = await MessageRepository.get_most_active_rooms_by_sender_name(normalized_name)
+    most_active_rooms = [
+        ContactActiveRoom(channel_key=key, channel_name=room_name, message_count=count)
+        for key, room_name, count in active_rooms_raw
+    ]
+
+    return NameOnlyContactDetail(
+        name=normalized_name,
+        channel_message_count=chan_count,
+        most_active_rooms=most_active_rooms,
+    )
+
+
 @router.get("/{public_key}", response_model=Contact)
 async def get_contact(public_key: str) -> Contact:
     """Get a specific contact by public key or prefix."""