add chat flow for search results

ios/Packages/Sybil/Sources/Sybil/SybilViewModel.swift

@@ -87,6 +87,7 @@ final class SybilViewModel {
     var isLoadingCollections = false
     var isLoadingSelection = false
     var isSending = false
+    var isCreatingSearchChat = false
     var errorMessage: String?
 
     var composer = ""
@@ -202,20 +203,20 @@ final class SybilViewModel {
     }
 
     var displayedMessages: [Message] {
-        let canonical = selectedChat?.messages ?? []
+        let canonical = displayableMessages(selectedChat?.messages ?? [])
         guard let pending = pendingChatState else {
             return canonical
         }
 
         if let pendingID = pending.chatID {
             if case let .chat(selectedID) = selectedItem, selectedID == pendingID {
-                return pending.messages
+                return displayableMessages(pending.messages)
             }
             return canonical
         }
 
         if draftKind == .chat {
-            return pending.messages
+            return displayableMessages(pending.messages)
         }
 
         return canonical
@@ -473,6 +474,36 @@ final class SybilViewModel {
         isSending = false
     }
 
+    func startChatFromSelectedSearch() async {
+        guard let search = selectedSearch, !isCreatingSearchChat, !isSending else {
+            return
+        }
+
+        isCreatingSearchChat = true
+        errorMessage = nil
+
+        do {
+            let client = try client()
+            let chat = try await client.createChatFromSearch(searchID: search.id)
+            draftKind = nil
+            pendingChatState = nil
+            composer = ""
+
+            chats.removeAll(where: { $0.id == chat.id })
+            chats.insert(chat, at: 0)
+
+            selectedItem = .chat(chat.id)
+            selectedSearch = nil
+
+            await refreshCollections(preferredSelection: .chat(chat.id))
+        } catch {
+            errorMessage = normalizeAPIError(error)
+            SybilLog.error(SybilLog.ui, "Create chat from search failed", error: error)
+        }
+
+        isCreatingSearchChat = false
+    }
+
     private func loadInitialData(using client: SybilAPIClient) async {
         isLoadingCollections = true
         errorMessage = nil
@@ -974,6 +1005,10 @@ final class SybilViewModel {
         }
     }
 
+    private func displayableMessages(_ messages: [Message]) -> [Message] {
+        messages.filter { $0.role != .system }
+    }
+
     private func chatTitle(title: String?, messages: [Message]?) -> String {
         if let title = title?.trimmingCharacters(in: .whitespacesAndNewlines), !title.isEmpty {
             return title