fix websocket tests

Co-authored-by: Igor Loskutov <igor.loskutoff@gmail.com>

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.28.0](https://github.com/Monadical-SAS/reflector/compare/v0.27.0...v0.28.0) (2026-01-20)
+
+
+### Features
+
+* worker affinity ([#819](https://github.com/Monadical-SAS/reflector/issues/819)) ([3b6540e](https://github.com/Monadical-SAS/reflector/commit/3b6540eae5b597449f98661bdf15483b77be3268))
+
 ## [0.27.0](https://github.com/Monadical-SAS/reflector/compare/v0.26.0...v0.27.0) (2025-12-26)
 
 

docker-compose.yml

@@ -34,7 +34,7 @@ services:
     environment:
       ENTRYPOINT: beat
 
-  hatchet-worker:
+  hatchet-worker-cpu:
     build:
       context: server
     volumes:
@@ -43,7 +43,20 @@ services:
     env_file:
       - ./server/.env
     environment:
-      ENTRYPOINT: hatchet-worker
+      ENTRYPOINT: hatchet-worker-cpu
+    depends_on:
+      hatchet:
+        condition: service_healthy
+  hatchet-worker-llm:
+    build:
+      context: server
+    volumes:
+      - ./server/:/app/
+      - /app/.venv
+    env_file:
+      - ./server/.env
+    environment:
+      ENTRYPOINT: hatchet-worker-llm
     depends_on:
       hatchet:
         condition: service_healthy

server/reflector/hatchet/run_workers.py

@@ -1,77 +0,0 @@
-"""
-Run Hatchet workers for the multitrack pipeline.
-Runs as a separate process, just like Celery workers.
-
-Usage:
-    uv run -m reflector.hatchet.run_workers
-
-    # Or via docker:
-    docker compose exec server uv run -m reflector.hatchet.run_workers
-"""
-
-import signal
-import sys
-
-from hatchet_sdk.rate_limit import RateLimitDuration
-
-from reflector.hatchet.constants import LLM_RATE_LIMIT_KEY, LLM_RATE_LIMIT_PER_SECOND
-from reflector.logger import logger
-from reflector.settings import settings
-
-
-def main() -> None:
-    """Start Hatchet worker polling."""
-    if not settings.HATCHET_ENABLED:
-        logger.error("HATCHET_ENABLED is False, not starting workers")
-        sys.exit(1)
-
-    if not settings.HATCHET_CLIENT_TOKEN:
-        logger.error("HATCHET_CLIENT_TOKEN is not set")
-        sys.exit(1)
-
-    logger.info(
-        "Starting Hatchet workers",
-        debug=settings.HATCHET_DEBUG,
-    )
-
-    # Import here (not top-level) - workflow modules call HatchetClientManager.get_client()
-    # at module level because Hatchet SDK decorators (@workflow.task) bind at import time.
-    # Can't use lazy init: decorators need the client object when function is defined.
-    from reflector.hatchet.client import HatchetClientManager  # noqa: PLC0415
-    from reflector.hatchet.workflows import (  # noqa: PLC0415
-        daily_multitrack_pipeline,
-        subject_workflow,
-        topic_chunk_workflow,
-        track_workflow,
-    )
-
-    hatchet = HatchetClientManager.get_client()
-
-    hatchet.rate_limits.put(
-        LLM_RATE_LIMIT_KEY, LLM_RATE_LIMIT_PER_SECOND, RateLimitDuration.SECOND
-    )
-
-    worker = hatchet.worker(
-        "reflector-pipeline-worker",
-        workflows=[
-            daily_multitrack_pipeline,
-            subject_workflow,
-            topic_chunk_workflow,
-            track_workflow,
-        ],
-    )
-
-    def shutdown_handler(signum: int, frame) -> None:
-        logger.info("Received shutdown signal, stopping workers...")
-        # Worker cleanup happens automatically on exit
-        sys.exit(0)
-
-    signal.signal(signal.SIGINT, shutdown_handler)
-    signal.signal(signal.SIGTERM, shutdown_handler)
-
-    logger.info("Starting Hatchet worker polling...")
-    worker.start()
-
-
-if __name__ == "__main__":
-    main()

server/reflector/hatchet/run_workers_cpu.py

@@ -0,0 +1,48 @@
+"""
+CPU-heavy worker pool for audio processing tasks.
+Handles ONLY: mixdown_tracks
+
+Configuration:
+- slots=1: Only mixdown (already serialized globally with max_runs=1)
+- Worker affinity: pool=cpu-heavy
+"""
+
+from reflector.hatchet.client import HatchetClientManager
+from reflector.hatchet.workflows.daily_multitrack_pipeline import (
+    daily_multitrack_pipeline,
+)
+from reflector.logger import logger
+from reflector.settings import settings
+
+
+def main():
+    if not settings.HATCHET_ENABLED:
+        logger.error("HATCHET_ENABLED is False, not starting CPU workers")
+        return
+
+    hatchet = HatchetClientManager.get_client()
+
+    logger.info(
+        "Starting Hatchet CPU worker pool (mixdown only)",
+        worker_name="cpu-worker-pool",
+        slots=1,
+        labels={"pool": "cpu-heavy"},
+    )
+
+    cpu_worker = hatchet.worker(
+        "cpu-worker-pool",
+        slots=1,  # Only 1 mixdown at a time (already serialized globally)
+        labels={
+            "pool": "cpu-heavy",
+        },
+        workflows=[daily_multitrack_pipeline],
+    )
+
+    try:
+        cpu_worker.start()
+    except KeyboardInterrupt:
+        logger.info("Received shutdown signal, stopping CPU workers...")
+
+
+if __name__ == "__main__":
+    main()

server/reflector/hatchet/run_workers_llm.py

@@ -0,0 +1,56 @@
+"""
+LLM/I/O worker pool for all non-CPU tasks.
+Handles: all tasks except mixdown_tracks (transcription, LLM inference, orchestration)
+"""
+
+from reflector.hatchet.client import HatchetClientManager
+from reflector.hatchet.workflows.daily_multitrack_pipeline import (
+    daily_multitrack_pipeline,
+)
+from reflector.hatchet.workflows.subject_processing import subject_workflow
+from reflector.hatchet.workflows.topic_chunk_processing import topic_chunk_workflow
+from reflector.hatchet.workflows.track_processing import track_workflow
+from reflector.logger import logger
+from reflector.settings import settings
+
+SLOTS = 10
+WORKER_NAME = "llm-worker-pool"
+POOL = "llm-io"
+
+
+def main():
+    if not settings.HATCHET_ENABLED:
+        logger.error("HATCHET_ENABLED is False, not starting LLM workers")
+        return
+
+    hatchet = HatchetClientManager.get_client()
+
+    logger.info(
+        "Starting Hatchet LLM worker pool (all tasks except mixdown)",
+        worker_name=WORKER_NAME,
+        slots=SLOTS,
+        labels={"pool": POOL},
+    )
+
+    llm_worker = hatchet.worker(
+        WORKER_NAME,
+        slots=SLOTS,  # not all slots are probably used
+        labels={
+            "pool": POOL,
+        },
+        workflows=[
+            daily_multitrack_pipeline,
+            topic_chunk_workflow,
+            subject_workflow,
+            track_workflow,
+        ],
+    )
+
+    try:
+        llm_worker.start()
+    except KeyboardInterrupt:
+        logger.info("Received shutdown signal, stopping LLM workers...")
+
+
+if __name__ == "__main__":
+    main()

server/reflector/hatchet/workflows/daily_multitrack_pipeline.py

@@ -23,7 +23,12 @@ from pathlib import Path
 from typing import Any, Callable, Coroutine, Protocol, TypeVar
 
 import httpx
-from hatchet_sdk import Context
+from hatchet_sdk import (
+    ConcurrencyExpression,
+    ConcurrencyLimitStrategy,
+    Context,
+)
+from hatchet_sdk.labels import DesiredWorkerLabel
 from pydantic import BaseModel
 
 from reflector.dailyco_api.client import DailyApiClient
@@ -467,6 +472,20 @@ async def process_tracks(input: PipelineInput, ctx: Context) -> ProcessTracksRes
     parents=[process_tracks],
     execution_timeout=timedelta(seconds=TIMEOUT_AUDIO),
     retries=3,
+    desired_worker_labels={
+        "pool": DesiredWorkerLabel(
+            value="cpu-heavy",
+            required=True,
+            weight=100,
+        ),
+    },
+    concurrency=[
+        ConcurrencyExpression(
+            expression="'mixdown-global'",
+            max_runs=1,  # serialize mixdown to prevent resource contention
+            limit_strategy=ConcurrencyLimitStrategy.GROUP_ROUND_ROBIN,  # Queue
+        )
+    ],
 )
 @with_error_handling(TaskName.MIXDOWN_TRACKS)
 async def mixdown_tracks(input: PipelineInput, ctx: Context) -> MixdownResult:

server/reflector/hatchet/workflows/topic_chunk_processing.py

@@ -7,7 +7,11 @@ Spawned dynamically by detect_topics via aio_run_many() for parallel processing.
 
 from datetime import timedelta
 
-from hatchet_sdk import ConcurrencyExpression, ConcurrencyLimitStrategy, Context
+from hatchet_sdk import (
+    ConcurrencyExpression,
+    ConcurrencyLimitStrategy,
+    Context,
+)
 from hatchet_sdk.rate_limit import RateLimit
 from pydantic import BaseModel
 
@@ -34,11 +38,13 @@ hatchet = HatchetClientManager.get_client()
 topic_chunk_workflow = hatchet.workflow(
     name="TopicChunkProcessing",
     input_validator=TopicChunkInput,
-    concurrency=ConcurrencyExpression(
-        expression="'global'",  # constant string = global limit across all runs
-        max_runs=20,
-        limit_strategy=ConcurrencyLimitStrategy.GROUP_ROUND_ROBIN,
-    ),
+    concurrency=[
+        ConcurrencyExpression(
+            expression="'global'",  # constant string = global limit across all runs
+            max_runs=20,
+            limit_strategy=ConcurrencyLimitStrategy.GROUP_ROUND_ROBIN,
+        )
+    ],
 )
 
 

server/reflector/ws_manager.py

@@ -11,7 +11,6 @@ broadcast messages to all connected websockets.
 
 import asyncio
 import json
-import threading
 
 import redis.asyncio as redis
 from fastapi import WebSocket
@@ -98,6 +97,7 @@ class WebsocketManager:
 
     async def _pubsub_data_reader(self, pubsub_subscriber):
         while True:
+            # No timeout - global singleton prevents CPU hog from multiple instances
             message = await pubsub_subscriber.get_message(
                 ignore_subscribe_messages=True
             )
@@ -109,29 +109,40 @@ class WebsocketManager:
                     await socket.send_json(data)
 
 
+# Process-global singleton (not thread-local)
+# The original threading.local() pattern was broken - it created a NEW
+# threading.local() object on every call, so caching never worked.
+# This caused infinite ws_manager instances → resource leaks → CPU hog.
+_ws_manager: WebsocketManager | None = None
+
+
 def get_ws_manager() -> WebsocketManager:
     """
-    Returns the WebsocketManager instance for managing websockets.
+    Returns the global WebsocketManager singleton.
 
-    This function initializes and returns the WebsocketManager instance,
-    which is responsible for managing websockets and handling websocket
-    connections.
+    Creates instance on first call, subsequent calls return cached instance.
+    Thread-safe via GIL. Concurrent initialization may create duplicate
+    instances but last write wins (acceptable for this use case).
 
     Returns:
-        WebsocketManager: The initialized WebsocketManager instance.
-
-    Raises:
-        ImportError: If the 'reflector.settings' module cannot be imported.
-        RedisConnectionError: If there is an error connecting to the Redis server.
+        WebsocketManager: The global WebsocketManager instance.
     """
-    local = threading.local()
-    if hasattr(local, "ws_manager"):
-        return local.ws_manager
+    global _ws_manager
 
+    if _ws_manager is not None:
+        return _ws_manager
+
+    # No lock needed - GIL makes this safe enough
+    # Worst case: race creates two instances, last assignment wins
     pubsub_client = RedisPubSubManager(
         host=settings.REDIS_HOST,
         port=settings.REDIS_PORT,
     )
-    ws_manager = WebsocketManager(pubsub_client=pubsub_client)
-    local.ws_manager = ws_manager
-    return ws_manager
+    _ws_manager = WebsocketManager(pubsub_client=pubsub_client)
+    return _ws_manager
+
+
+def reset_ws_manager() -> None:
+    """Reset singleton for testing. DO NOT use in production."""
+    global _ws_manager
+    _ws_manager = None

server/runserver.sh

@@ -7,8 +7,10 @@ elif [ "${ENTRYPOINT}" = "worker" ]; then
     uv run celery -A reflector.worker.app worker --loglevel=info
 elif [ "${ENTRYPOINT}" = "beat" ]; then
     uv run celery -A reflector.worker.app beat --loglevel=info
-elif [ "${ENTRYPOINT}" = "hatchet-worker" ]; then
-    uv run python -m reflector.hatchet.run_workers
+elif [ "${ENTRYPOINT}" = "hatchet-worker-cpu" ]; then
+    uv run python -m reflector.hatchet.run_workers_cpu
+elif [ "${ENTRYPOINT}" = "hatchet-worker-llm" ]; then
+    uv run python -m reflector.hatchet.run_workers_llm
 else
     echo "Unknown command"
 fi

server/tests/test_user_websocket_auth.py

@@ -56,7 +56,12 @@ def appserver_ws_user(setup_database):
 
     if server_instance:
         server_instance.should_exit = True
-        server_thread.join(timeout=30)
+        server_thread.join(timeout=2.0)
+
+    # Reset global singleton for test isolation
+    from reflector.ws_manager import reset_ws_manager
+
+    reset_ws_manager()
 
 
 @pytest.fixture(autouse=True)
@@ -133,6 +138,11 @@ async def test_user_ws_accepts_valid_token_and_receives_events(appserver_ws_user
 
     # Connect and then trigger an event via HTTP create
     async with aconnect_ws(base_ws, subprotocols=subprotocols) as ws:
+        # Give Redis pubsub time to establish subscription before publishing
+        import asyncio
+
+        await asyncio.sleep(0.2)
+
         # Emit an event to the user's room via a standard HTTP action
         from httpx import AsyncClient
 
@@ -150,6 +160,7 @@ async def test_user_ws_accepts_valid_token_and_receives_events(appserver_ws_user
             "email": "user-abc@example.com",
         }
 
+        # Use in-memory client (global singleton makes it share ws_manager)
         async with AsyncClient(app=app, base_url=f"http://{host}:{port}/v1") as ac:
             # Create a transcript as this user so that the server publishes TRANSCRIPT_CREATED to user room
             resp = await ac.post("/transcripts", json={"name": "WS Test"})

www/app/(app)/transcripts/[transcriptId]/_components/TopicList.tsx

@@ -1,12 +1,12 @@
 import React, { useState, useEffect } from "react";
 import ScrollToBottom from "../../scrollToBottom";
 import { Topic } from "../../webSocketTypes";
-import { Box, Flex, Text } from "@chakra-ui/react";
-import { formatTime } from "../../../../lib/time";
-import { getTopicColor } from "../../../../lib/topicColors";
+import useParticipants from "../../useParticipants";
+import { Box, Flex, Text, Accordion } from "@chakra-ui/react";
+import { TopicItem } from "./TopicItem";
 import { TranscriptStatus } from "../../../../lib/transcript";
+
 import { featureEnabled } from "../../../../lib/features";
-import { TOPICS_SCROLL_DIV_ID } from "./constants";
 
 type TopicListProps = {
   topics: Topic[];
@@ -18,7 +18,6 @@ type TopicListProps = {
   transcriptId: string;
   status: TranscriptStatus | null;
   currentTranscriptText: any;
-  onTopicClick?: (topicId: string) => void;
 };
 
 export function TopicList({
@@ -28,13 +27,30 @@ export function TopicList({
   transcriptId,
   status,
   currentTranscriptText,
-  onTopicClick,
 }: TopicListProps) {
   const [activeTopic, setActiveTopic] = useActiveTopic;
-  const [hoveredTopicId, setHoveredTopicId] = useState<string | null>(null);
   const [autoscrollEnabled, setAutoscrollEnabled] = useState<boolean>(true);
+  const participants = useParticipants(transcriptId);
 
-  const toggleScroll = (element: HTMLElement) => {
+  const scrollToTopic = () => {
+    const topicDiv = document.getElementById(`topic-${activeTopic?.id}`);
+
+    setTimeout(() => {
+      topicDiv?.scrollIntoView({
+        behavior: "smooth",
+        block: "start",
+        inline: "nearest",
+      });
+    }, 200);
+  };
+
+  useEffect(() => {
+    if (activeTopic && autoscroll) scrollToTopic();
+  }, [activeTopic, autoscroll]);
+
+  // scroll top is not rounded, heights are, so exact match won't work.
+  // https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight#determine_if_an_element_has_been_totally_scrolled
+  const toggleScroll = (element) => {
     const bottom =
       Math.abs(
         element.scrollHeight - element.clientHeight - element.scrollTop,
@@ -45,19 +61,14 @@ export function TopicList({
       setAutoscrollEnabled(true);
     }
   };
-
-  const handleScroll = (e: React.UIEvent<HTMLDivElement>) => {
-    toggleScroll(e.target as HTMLElement);
-  };
-
-  const scrollToBottom = () => {
-    const topicsDiv = document.getElementById(TOPICS_SCROLL_DIV_ID);
-    if (topicsDiv) topicsDiv.scrollTop = topicsDiv.scrollHeight;
+  const handleScroll = (e) => {
+    toggleScroll(e.target);
   };
 
   useEffect(() => {
     if (autoscroll) {
-      const topicsDiv = document.getElementById(TOPICS_SCROLL_DIV_ID);
+      const topicsDiv = document.getElementById("scroll-div");
+
       topicsDiv && toggleScroll(topicsDiv);
     }
   }, [activeTopic, autoscroll]);
@@ -66,41 +77,37 @@ export function TopicList({
     if (autoscroll && autoscrollEnabled) scrollToBottom();
   }, [topics.length, currentTranscriptText]);
 
+  const scrollToBottom = () => {
+    const topicsDiv = document.getElementById("scroll-div");
+
+    if (topicsDiv) topicsDiv.scrollTop = topicsDiv.scrollHeight;
+  };
+
+  const getSpeakerName = (speakerNumber: number) => {
+    if (!participants.response) return;
+    return (
+      participants.response.find(
+        (participant) => participant.speaker == speakerNumber,
+      )?.name || `Speaker ${speakerNumber}`
+    );
+  };
+
+  const requireLogin = featureEnabled("requireLogin");
+
   useEffect(() => {
     if (autoscroll) {
       setActiveTopic(topics[topics.length - 1]);
     }
   }, [topics, autoscroll]);
 
-  const handleTopicClick = (topic: Topic) => {
-    setActiveTopic(topic);
-    if (onTopicClick) {
-      onTopicClick(topic.id);
-    }
-  };
-
-  const handleTopicMouseEnter = (topic: Topic) => {
-    setHoveredTopicId(topic.id);
-    // If already active, toggle off when mousing over
-    if (activeTopic?.id === topic.id) {
-      setActiveTopic(null);
-    } else {
-      setActiveTopic(topic);
-    }
-  };
-
-  const handleTopicMouseLeave = () => {
-    setHoveredTopicId(null);
-  };
-
-  const requireLogin = featureEnabled("requireLogin");
-
   return (
     <Flex
-      position="relative"
-      w="full"
-      h="200px"
-      flexDirection="column"
+      position={"relative"}
+      w={"100%"}
+      h={"95%"}
+      flexDirection={"column"}
+      justify={"center"}
+      align={"center"}
       flexShrink={0}
     >
       {autoscroll && (
@@ -111,71 +118,45 @@ export function TopicList({
       )}
 
       <Box
-        id={TOPICS_SCROLL_DIV_ID}
-        overflowY="auto"
-        h="full"
+        id="scroll-div"
+        overflowY={"auto"}
+        h={"100%"}
         onScroll={handleScroll}
         width="full"
       >
         {topics.length > 0 && (
-          <Flex direction="column" gap={1} p={2}>
-            {topics.map((topic, index) => {
-              const color = getTopicColor(index);
-              const isActive = activeTopic?.id === topic.id;
-              const isHovered = hoveredTopicId === topic.id;
-
-              return (
-                <Flex
-                  key={topic.id}
-                  id={`topic-${topic.id}`}
-                  gap={2}
-                  align="center"
-                  py={1}
-                  px={2}
-                  cursor="pointer"
-                  bg={isActive || isHovered ? "gray.100" : "transparent"}
-                  _hover={{ bg: "gray.50" }}
-                  onClick={() => handleTopicClick(topic)}
-                  onMouseEnter={() => handleTopicMouseEnter(topic)}
-                  onMouseLeave={handleTopicMouseLeave}
-                >
-                  {/* Color indicator */}
-                  <Box
-                    w="12px"
-                    h="12px"
-                    borderRadius="full"
-                    bg={color}
-                    flexShrink={0}
-                  />
-
-                  {/* Topic title */}
-                  <Text
-                    flex={1}
-                    fontSize="sm"
-                    fontWeight={isActive ? "semibold" : "normal"}
-                  >
-                    {topic.title}
-                  </Text>
-
-                  {/* Timestamp */}
-                  <Text as="span" color="gray.500" fontSize="xs" flexShrink={0}>
-                    {formatTime(topic.timestamp)}
-                  </Text>
-                </Flex>
-              );
-            })}
-          </Flex>
+          <Accordion.Root
+            multiple={false}
+            collapsible={true}
+            value={activeTopic ? [activeTopic.id] : []}
+            onValueChange={(details) => {
+              const selectedTopicId = details.value[0];
+              const selectedTopic = selectedTopicId
+                ? topics.find((t) => t.id === selectedTopicId)
+                : null;
+              setActiveTopic(selectedTopic || null);
+            }}
+          >
+            {topics.map((topic) => (
+              <TopicItem
+                key={topic.id}
+                topic={topic}
+                isActive={activeTopic?.id === topic.id}
+                getSpeakerName={getSpeakerName}
+              />
+            ))}
+          </Accordion.Root>
         )}
 
         {status == "recording" && (
-          <Box textAlign="center">
+          <Box textAlign={"center"}>
             <Text>{currentTranscriptText}</Text>
           </Box>
         )}
         {(status == "recording" || status == "idle") &&
           currentTranscriptText.length == 0 &&
           topics.length == 0 && (
-            <Box textAlign="center" color="gray">
+            <Box textAlign={"center"} color="gray">
               <Text>
                 Full discussion transcript will appear here after you start
                 recording.
@@ -186,7 +167,7 @@ export function TopicList({
             </Box>
           )}
         {status == "processing" && (
-          <Box textAlign="center" color="gray">
+          <Box textAlign={"center"} color="gray">
             <Text>We are processing the recording, please wait.</Text>
             {!requireLogin && (
               <span>
@@ -196,12 +177,12 @@ export function TopicList({
           </Box>
         )}
         {status == "ended" && topics.length == 0 && (
-          <Box textAlign="center" color="gray">
+          <Box textAlign={"center"} color="gray">
             <Text>Recording has ended without topics being found.</Text>
           </Box>
         )}
         {status == "error" && (
-          <Box textAlign="center" color="gray">
+          <Box textAlign={"center"} color="gray">
             <Text>There was an error processing your recording</Text>
           </Box>
         )}

www/app/(app)/transcripts/[transcriptId]/_components/TranscriptWithGutter.tsx

@@ -1,106 +0,0 @@
-import { Box, Text, IconButton } from "@chakra-ui/react";
-import { ChevronUp } from "lucide-react";
-import { Topic } from "../../webSocketTypes";
-import { getTopicColor } from "../../../../lib/topicColors";
-import { TOPICS_SCROLL_DIV_ID } from "./constants";
-
-interface TranscriptWithGutterProps {
-  topics: Topic[];
-  getSpeakerName: (speakerNumber: number) => string | undefined;
-  onGutterClick: (topicId: string) => void;
-}
-
-export function TranscriptWithGutter({
-  topics,
-  getSpeakerName,
-  onGutterClick,
-}: TranscriptWithGutterProps) {
-  const scrollToTopics = () => {
-    // Scroll to the topic list at the top
-    const topicList = document.getElementById(TOPICS_SCROLL_DIV_ID);
-    if (topicList) {
-      topicList.scrollIntoView({
-        behavior: "smooth",
-        block: "start",
-      });
-    }
-  };
-
-  return (
-    <Box>
-      {topics.map((topic, topicIndex) => {
-        const color = getTopicColor(topicIndex);
-
-        return (
-          <Box key={topic.id} position="relative">
-            {/* Topic Header with Up Button */}
-            <Box
-              py={3}
-              px={4}
-              fontWeight="semibold"
-              fontSize="lg"
-              display="flex"
-              alignItems="center"
-              justifyContent="space-between"
-            >
-              <Text>{topic.title}</Text>
-              <IconButton
-                aria-label="Scroll to topics"
-                size="sm"
-                variant="ghost"
-                onClick={scrollToTopics}
-              >
-                <ChevronUp size={16} />
-              </IconButton>
-            </Box>
-
-            {/* Segments container with single gutter */}
-            <Box position="relative">
-              {/* Single continuous gutter for entire topic */}
-              <Box
-                className="topic-gutter"
-                position="absolute"
-                left={0}
-                top={0}
-                bottom={0}
-                width="4px"
-                bg={color}
-                cursor="pointer"
-                transition="all 0.2s"
-                _hover={{
-                  filter: "brightness(1.2)",
-                  width: "6px",
-                }}
-                onClick={() => onGutterClick(topic.id)}
-              />
-
-              {/* Segments */}
-              {topic.segments?.map((segment, segmentIndex) => (
-                <Box
-                  key={segmentIndex}
-                  id={`segment-${topic.id}-${segmentIndex}`}
-                  py={2}
-                  px={4}
-                  pl={12}
-                  _hover={{
-                    bg: "gray.50",
-                  }}
-                >
-                  {/* Segment Content */}
-                  <Text fontSize="sm">
-                    <Text as="span" fontWeight="semibold" color="gray.700">
-                      {getSpeakerName(segment.speaker) ||
-                        `Speaker ${segment.speaker}`}
-                      :
-                    </Text>{" "}
-                    {segment.text}
-                  </Text>
-                </Box>
-              ))}
-            </Box>
-          </Box>
-        );
-      })}
-    </Box>
-  );
-}

www/app/(app)/transcripts/[transcriptId]/_components/constants.ts

@@ -1 +0,0 @@
-export const TOPICS_SCROLL_DIV_ID = "topics-scroll-div";

www/app/(app)/transcripts/[transcriptId]/page.tsx

@@ -3,9 +3,7 @@ import Modal from "../modal";
 import useTopics from "../useTopics";
 import useWaveform from "../useWaveform";
 import useMp3 from "../useMp3";
-import useParticipants from "../useParticipants";
 import { TopicList } from "./_components/TopicList";
-import { TranscriptWithGutter } from "./_components/TranscriptWithGutter";
 import { Topic } from "../webSocketTypes";
 import React, { useEffect, useState, use } from "react";
 import FinalSummary from "./finalSummary";
@@ -47,91 +45,14 @@ export default function TranscriptDetails(details: TranscriptDetails) {
 
   const mp3 = useMp3(transcriptId, waiting);
   const topics = useTopics(transcriptId);
-  const participants = useParticipants(transcriptId);
   const waveform = useWaveform(
     transcriptId,
     waiting || mp3.audioDeleted === true,
   );
   const useActiveTopic = useState<Topic | null>(null);
-  const [activeTopic, setActiveTopic] = useActiveTopic;
   const [finalSummaryElement, setFinalSummaryElement] =
     useState<HTMLDivElement | null>(null);
 
-  // IntersectionObserver for active topic detection based on scroll position
-  useEffect(() => {
-    if (!topics.topics || topics.topics.length === 0) return;
-
-    const observer = new IntersectionObserver(
-      (entries) => {
-        // Find the most visible segment
-        let mostVisibleEntry: IntersectionObserverEntry | null = null;
-        let maxRatio = 0;
-
-        entries.forEach((entry) => {
-          if (entry.isIntersecting && entry.intersectionRatio > maxRatio) {
-            maxRatio = entry.intersectionRatio;
-            mostVisibleEntry = entry;
-          }
-        });
-
-        if (mostVisibleEntry) {
-          // Extract topicId from segment id (format: "segment-{topicId}-{idx}")
-          const segmentId = mostVisibleEntry.target.id;
-          const match = segmentId.match(/^segment-([^-]+)-/);
-          if (match) {
-            const topicId = match[1];
-            const topic = topics.topics?.find((t) => t.id === topicId);
-            if (topic && activeTopic?.id !== topic.id) {
-              setActiveTopic(topic);
-            }
-          }
-        }
-      },
-      {
-        threshold: [0, 0.25, 0.5, 0.75, 1],
-        rootMargin: "-20% 0px -20% 0px",
-      },
-    );
-
-    // Observe all segment elements
-    const segments = document.querySelectorAll('[id^="segment-"]');
-    segments.forEach((segment) => observer.observe(segment));
-
-    return () => observer.disconnect();
-  }, [topics.topics, activeTopic?.id, setActiveTopic]);
-
-  // Scroll handlers for bidirectional navigation
-  const handleTopicClick = (topicId: string) => {
-    // Scroll to first segment of this topic in transcript
-    const firstSegment = document.querySelector(`[id^="segment-${topicId}-"]`);
-    if (firstSegment) {
-      firstSegment.scrollIntoView({
-        behavior: "smooth",
-        block: "center",
-      });
-    }
-  };
-
-  const handleGutterClick = (topicId: string) => {
-    // Scroll to topic in list
-    const topicChip = document.getElementById(`topic-${topicId}`);
-    if (topicChip) {
-      topicChip.scrollIntoView({
-        behavior: "smooth",
-        block: "center",
-      });
-    }
-  };
-
-  const getSpeakerName = (speakerNumber: number) => {
-    if (!participants.response) return `Speaker ${speakerNumber}`;
-    return (
-      participants.response.find(
-        (participant) => participant.speaker == speakerNumber,
-      )?.name || `Speaker ${speakerNumber}`
-    );
-  };
-
   useEffect(() => {
     if (!waiting || !transcript.data) return;
 
@@ -200,7 +121,7 @@ export default function TranscriptDetails(details: TranscriptDetails) {
     <>
       <Grid
         templateColumns="1fr"
-        templateRows="auto auto"
+        templateRows="auto minmax(0, 1fr)"
         gap={4}
         mt={4}
         mb={4}
@@ -232,18 +153,18 @@ export default function TranscriptDetails(details: TranscriptDetails) {
         <Grid
           templateColumns={{ base: "minmax(0, 1fr)", md: "repeat(2, 1fr)" }}
           templateRows={{
-            base: "auto auto auto",
-            md: "auto auto",
+            base: "auto minmax(0, 1fr) minmax(0, 1fr)",
+            md: "auto minmax(0, 1fr)",
           }}
           gap={4}
           gridRowGap={2}
           padding={4}
+          paddingBottom={0}
           background="gray.bg"
           border={"2px solid"}
           borderColor={"gray.bg"}
           borderRadius={8}
         >
-          {/* Title */}
           <GridItem colSpan={{ base: 1, md: 2 }}>
             <Flex direction="column" gap={0}>
               <Flex alignItems="center" gap={2}>
@@ -266,64 +187,28 @@ export default function TranscriptDetails(details: TranscriptDetails) {
               )}
             </Flex>
           </GridItem>
-
-          {/* Left column: Topics List */}
-          <GridItem display="flex" flexDirection="column" gap={4} h="100%">
-            <TopicList
-              topics={topics.topics || []}
-              useActiveTopic={useActiveTopic}
-              autoscroll={false}
-              transcriptId={transcriptId}
-              status={transcript.data?.status || null}
-              currentTranscriptText=""
-              onTopicClick={handleTopicClick}
-            />
-
-            {/* Transcript with colored gutter (scrollable) */}
-            {topics.topics && topics.topics.length > 0 && (
-              <Box
-                overflowY="auto"
-                flex={1}
-                minH="0"
-                pr={2}
-                css={{
-                  "&::-webkit-scrollbar": {
-                    width: "8px",
-                  },
-                  "&::-webkit-scrollbar-track": {
-                    background: "transparent",
-                  },
-                  "&::-webkit-scrollbar-thumb": {
-                    background: "#CBD5E0",
-                    borderRadius: "4px",
-                  },
-                  "&::-webkit-scrollbar-thumb:hover": {
-                    background: "#A0AEC0",
-                  },
-                }}
-              >
-                <TranscriptWithGutter
-                  topics={topics.topics}
-                  getSpeakerName={getSpeakerName}
-                  onGutterClick={handleGutterClick}
-                />
-              </Box>
-            )}
-          </GridItem>
-
-          {/* Right column: Final Summary */}
+          <TopicList
+            topics={topics.topics || []}
+            useActiveTopic={useActiveTopic}
+            autoscroll={false}
+            transcriptId={transcriptId}
+            status={transcript.data?.status || null}
+            currentTranscriptText=""
+          />
           {transcript.data && topics.topics ? (
-            <FinalSummary
-              transcript={transcript.data}
-              topics={topics.topics}
-              onUpdate={() => {
-                transcript.refetch().then(() => {});
-              }}
-              finalSummaryRef={setFinalSummaryElement}
-            />
+            <>
+              <FinalSummary
+                transcript={transcript.data}
+                topics={topics.topics}
+                onUpdate={() => {
+                  transcript.refetch().then(() => {});
+                }}
+                finalSummaryRef={setFinalSummaryElement}
+              />
+            </>
           ) : (
-            <Flex justify="center" alignItems="center" h="100%">
-              <Flex direction="column" h="full" justify="center" align="center">
+            <Flex justify={"center"} alignItems={"center"} h={"100%"}>
+              <div className="flex flex-col h-full justify-center content-center">
                 {transcript?.data?.status == "processing" ? (
                   <Text>Loading Transcript</Text>
                 ) : (
@@ -332,7 +217,7 @@ export default function TranscriptDetails(details: TranscriptDetails) {
                     back later
                   </Text>
                 )}
-              </Flex>
+              </div>
             </Flex>
           )}
         </Grid>

www/app/lib/topicColors.ts

@@ -1,18 +0,0 @@
-// Predefined color palette for topics
-// Colors chosen for good contrast and visual distinction
-export const TOPIC_COLORS = [
-  "#3B82F6", // blue
-  "#10B981", // green
-  "#F59E0B", // amber
-  "#EF4444", // red
-  "#8B5CF6", // violet
-  "#EC4899", // pink
-  "#14B8A6", // teal
-  "#F97316", // orange
-  "#6366F1", // indigo
-  "#84CC16", // lime
-] as const;
-
-export function getTopicColor(topicIndex: number): string {
-  return TOPIC_COLORS[topicIndex % TOPIC_COLORS.length];
-}