refactor: вынес сервисы и ui-компоненты

- вынес token/chat/update логику в services

- вынес диалог и текст инструкции в ui

- добавил и обновил тесты для нового слоя

services/chat_actions.py

@@ -0,0 +1,46 @@
+from urllib.parse import urlparse
+
+
+def resolve_user_ids(vk_call_with_retry, vk_api, links):
+    resolved_ids = []
+    failed_links = []
+    for link in links:
+        try:
+            path = urlparse(link).path
+            screen_name = path.split("/")[-1] if path else ""
+            if not screen_name and len(path.split("/")) > 1:
+                screen_name = path.split("/")[-2]
+            if not screen_name:
+                failed_links.append((link, None))
+                continue
+            resolved_object = vk_call_with_retry(vk_api.utils.resolveScreenName, screen_name=screen_name)
+            if resolved_object and resolved_object.get("type") == "user":
+                resolved_ids.append(resolved_object["object_id"])
+            else:
+                failed_links.append((link, None))
+        except Exception as e:
+            failed_links.append((link, e))
+    return resolved_ids, failed_links
+
+
+def load_chat_conversations(vk_call_with_retry, vk_api):
+    conversations = []
+    start_from = None
+    seen_start_tokens = set()
+    while True:
+        params = {"count": 200, "filter": "all"}
+        if start_from:
+            if start_from in seen_start_tokens:
+                break
+            params["start_from"] = start_from
+            seen_start_tokens.add(start_from)
+        response = vk_call_with_retry(vk_api.messages.getConversations, **params)
+        page_items = response.get("items", [])
+        if not page_items:
+            break
+        conversations.extend(page_items)
+        start_from = response.get("next_from")
+        if not start_from:
+            break
+    return conversations
+