Handle empty docker log periods

handlers/callbacks.py

@@ -117,6 +117,11 @@ async def logs_options(cb: CallbackQuery):
     if action == "tail":
         await cb.answer("Loading logs…")
         rc, out = await docker_cmd(["logs", "--tail", "80", real])
+        if rc != 0:
+            await cb.message.answer(out)
+            return
+        if not out.strip():
+            out = "(no logs)"
         await cb.message.answer(
             f"📜 **Logs: {alias}**\n```{out}```",
             parse_mode="Markdown"
@@ -132,6 +137,11 @@ async def logs_options(cb: CallbackQuery):
         since_ts = str(int(time.time() - seconds))
         await cb.answer("Loading logs…")
         rc, out = await docker_cmd(["logs", "--since", since_ts, "--tail", "200", real])
+        if rc != 0:
+            await cb.message.answer(out)
+            return
+        if not out.strip():
+            out = "(no logs for period)"
         await cb.message.answer(
             f"📜 **Logs: {alias}**\n```{out}```",
             parse_mode="Markdown"