fix(contacts): consistent sender_id format and show contact_type in UI

- Use senderID (id|username) instead of userID in group no-mention path,
  preventing duplicate contacts for the same Telegram user
- Use full name (FirstName + LastName) in both contact insert paths
- Show contact_type (User/Group) instead of peer_kind (Direct/Group) in
  contacts table TYPE column and filter dropdown
- Add contact_type filter support in HTTP handler, PG and SQLite stores

internal/channels/telegram/handlers.go

@@ -336,7 +336,7 @@ func (c *Channel) handleMessage(ctx context.Context, update telego.Update) {
 			// Collect contact even when bot is not mentioned (cache prevents DB spam).
 			if cc := c.ContactCollector(); cc != nil {
 				contactName := strings.TrimSpace(user.FirstName + " " + user.LastName)
-				cc.EnsureContact(ctx, c.Type(), c.Name(), userID, userID, contactName, user.Username, "group", "user")
+				cc.EnsureContact(ctx, c.Type(), c.Name(), senderID, userID, contactName, user.Username, "group", "user")
 				// Also collect group chat itself as a contact (for group permission / merge).
 				cc.EnsureContact(ctx, c.Type(), c.Name(), chatIDStr, "", message.Chat.Title, "", "group", "group")
 			}
@@ -590,7 +590,8 @@ func (c *Channel) handleMessage(ctx context.Context, update telego.Update) {
 
 	// Collect contact for processed messages (DM + group-mentioned).
 	if cc := c.ContactCollector(); cc != nil {
-		cc.EnsureContact(ctx, c.Type(), c.Name(), senderID, userID, user.FirstName, user.Username, peerKind, "user")
+		contactName := strings.TrimSpace(user.FirstName + " " + user.LastName)
+		cc.EnsureContact(ctx, c.Type(), c.Name(), senderID, userID, contactName, user.Username, peerKind, "user")
 		// Also collect group chat itself as a contact (for group permission / merge).
 		if isGroup {
 			cc.EnsureContact(ctx, c.Type(), c.Name(), chatIDStr, "", message.Chat.Title, "", "group", "group")

internal/http/channel_instances.go

@@ -476,6 +476,9 @@ func (h *ChannelInstancesHandler) handleListContacts(w http.ResponseWriter, r *h
 	if v := r.URL.Query().Get("peer_kind"); v != "" {
 		opts.PeerKind = v
 	}
+	if v := r.URL.Query().Get("contact_type"); v != "" {
+		opts.ContactType = v
+	}
 	if v := r.URL.Query().Get("limit"); v != "" {
 		if n, err := strconv.Atoi(v); err == nil && n > 0 && n <= 200 {
 			opts.Limit = n

internal/store/contact_store.go

@@ -30,6 +30,7 @@ type ContactListOpts struct {
 	Search      string // ILIKE on display_name, username, sender_id
 	ChannelType string // filter by platform (telegram, discord, etc.)
 	PeerKind    string // "direct" or "group"
+	ContactType string // "user" or "group"
 	Limit       int
 	Offset      int
 }

internal/store/pg/channel_contacts.go

@@ -68,6 +68,11 @@ func contactWhereClause(ctx context.Context, opts store.ContactListOpts) (string
 		args = append(args, opts.PeerKind)
 		argIdx++
 	}
+	if opts.ContactType != "" {
+		conditions = append(conditions, fmt.Sprintf("contact_type = $%d", argIdx))
+		args = append(args, opts.ContactType)
+		argIdx++
+	}
 	if opts.Search != "" {
 		escaped := strings.NewReplacer("%", "\\%", "_", "\\_").Replace(opts.Search)
 		pattern := escaped + "%"

internal/store/sqlitestore/contacts.go

@@ -72,6 +72,10 @@ func contactWhereSQLite(ctx context.Context, opts store.ContactListOpts) (string
 		conditions = append(conditions, "peer_kind = ?")
 		args = append(args, opts.PeerKind)
 	}
+	if opts.ContactType != "" {
+		conditions = append(conditions, "contact_type = ?")
+		args = append(args, opts.ContactType)
+	}
 	if opts.Search != "" {
 		escaped := strings.NewReplacer("%", "\\%", "_", "\\_").Replace(opts.Search)
 		pattern := escaped + "%"

ui/web/src/i18n/locales/en/contacts.json

@@ -45,6 +45,10 @@
     "unmergeError": "Failed to unmerge contacts",
     "comingSoon": "This feature is under development and not yet available."
   },
+  "types": {
+    "user": "User",
+    "group": "Group"
+  },
   "filters": {
     "allChannels": "All Channels",
     "allTypes": "All Types",

ui/web/src/i18n/locales/vi/contacts.json

@@ -45,6 +45,10 @@
     "unmergeError": "Không thể tách liên hệ",
     "comingSoon": "Tính năng này đang được phát triển và chưa khả dụng."
   },
+  "types": {
+    "user": "Người dùng",
+    "group": "Nhóm"
+  },
   "filters": {
     "allChannels": "Tất cả Channel",
     "allTypes": "Tất cả loại",

ui/web/src/i18n/locales/zh/contacts.json

@@ -45,6 +45,10 @@
     "unmergeError": "取消合并失败",
     "comingSoon": "此功能正在开发中，尚不可用。"
   },
+  "types": {
+    "user": "用户",
+    "group": "群组"
+  },
   "filters": {
     "allChannels": "所有Channel",
     "allTypes": "所有类型",

ui/web/src/pages/contacts/contacts-page.tsx

@@ -33,7 +33,7 @@ export function ContactsPage() {
   const [search, setSearch] = useState("");
   const [appliedSearch, setAppliedSearch] = useState("");
   const [channelType, setChannelType] = useState("");
-  const [peerKind, setPeerKind] = useState("");
+  const [contactType, setContactType] = useState("");
   const [page, setPage] = useState(1);
   const [pageSize, setPageSize] = useState(20);
 
@@ -44,7 +44,7 @@ export function ContactsPage() {
   const { contacts, total, loading, fetching, refresh } = useContacts({
     search: appliedSearch || undefined,
     channelType: channelType || undefined,
-    peerKind: peerKind || undefined,
+    contactType: contactType || undefined,
     limit: pageSize,
     offset: (page - 1) * pageSize,
   });
@@ -57,7 +57,7 @@ export function ContactsPage() {
   // Clear selection on page/filter change
   useEffect(() => {
     setSelectedIds(new Set());
-  }, [page, pageSize, appliedSearch, channelType, peerKind]);
+  }, [page, pageSize, appliedSearch, channelType, contactType]);
 
   const handleSearchSubmit = (e: React.FormEvent) => {
     e.preventDefault();
@@ -70,8 +70,8 @@ export function ContactsPage() {
     setPage(1);
   };
 
-  const handlePeerKindChange = (val: string) => {
-    setPeerKind(val === "all" ? "" : val);
+  const handleContactTypeChange = (val: string) => {
+    setContactType(val === "all" ? "" : val);
     setPage(1);
   };
 
@@ -149,14 +149,14 @@ export function ContactsPage() {
           </SelectContent>
         </Select>
 
-        <Select value={peerKind || "all"} onValueChange={handlePeerKindChange}>
+        <Select value={contactType || "all"} onValueChange={handleContactTypeChange}>
           <SelectTrigger className="w-[140px]">
             <SelectValue />
           </SelectTrigger>
           <SelectContent>
             <SelectItem value="all">{t("filters.allTypes")}</SelectItem>
-            <SelectItem value="direct">{t("filters.direct")}</SelectItem>
-            <SelectItem value="group">{t("filters.group")}</SelectItem>
+            <SelectItem value="user">{t("types.user")}</SelectItem>
+            <SelectItem value="group">{t("types.group")}</SelectItem>
           </SelectContent>
         </Select>
       </div>
@@ -187,8 +187,8 @@ export function ContactsPage() {
         ) : contacts.length === 0 ? (
           <EmptyState
             icon={Contact}
-            title={appliedSearch || channelType || peerKind ? t("noMatchTitle") : t("emptyTitle")}
-            description={appliedSearch || channelType || peerKind ? t("noMatchDescription") : t("emptyDescription")}
+            title={appliedSearch || channelType || contactType ? t("noMatchTitle") : t("emptyTitle")}
+            description={appliedSearch || channelType || contactType ? t("noMatchDescription") : t("emptyDescription")}
           />
         ) : (
           <div className="rounded-md border overflow-x-auto">
@@ -249,11 +249,9 @@ export function ContactsPage() {
                       <Badge variant="outline" className="text-[11px]">{c.channel_type}</Badge>
                     </td>
                     <td className="px-3 py-2.5">
-                      {c.peer_kind && (
-                        <Badge variant={c.peer_kind === "direct" ? "default" : "secondary"} className="text-[11px]">
-                          {c.peer_kind === "direct" ? t("filters.direct") : t("filters.group")}
-                        </Badge>
-                      )}
+                      <Badge variant={c.contact_type === "user" ? "default" : "secondary"} className="text-[11px]">
+                        {c.contact_type === "user" ? t("types.user") : t("types.group")}
+                      </Badge>
                     </td>
                     <td className="px-3 py-2.5 text-muted-foreground text-xs">
                       {formatDate(c.last_seen_at)}

ui/web/src/pages/contacts/hooks/use-contacts.ts

@@ -10,6 +10,7 @@ export interface ContactFilters {
   search?: string;
   channelType?: string;
   peerKind?: string;
+  contactType?: string;
   limit?: number;
   offset?: number;
 }
@@ -27,6 +28,7 @@ export function useContacts(filters: ContactFilters = {}) {
       if (filters.search) params.search = filters.search;
       if (filters.channelType) params.channel_type = filters.channelType;
       if (filters.peerKind) params.peer_kind = filters.peerKind;
+      if (filters.contactType) params.contact_type = filters.contactType;
       if (filters.limit) params.limit = String(filters.limit);
       if (filters.offset !== undefined) params.offset = String(filters.offset);
 

ui/web/src/types/contact.ts

@@ -19,6 +19,7 @@ export interface ChannelContact {
   username?: string;
   avatar_url?: string;
   peer_kind?: string;
+  contact_type: string; // "user" or "group"
   merged_id?: string;
   first_seen_at: string;
   last_seen_at: string;