diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index 30d0a9745..8c0f64f6b 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -92,10 +92,13 @@ Plans:
3. Mixer categorization doesn't dispatch when content unchanged
4. Loading states moved to components that use them
5. JKSessionScreen re-render count reduced by 50%+
-**Plans**: TBD
+**Plans**: 4 plans
Plans:
-- [ ] 32-01: TBD
+- [ ] 32-01-PLAN.md — Consolidate track sync and fix useSessionModel debounce recreation
+- [ ] 32-02-PLAN.md — Add content comparison before mixer category dispatches
+- [ ] 32-03-PLAN.md — Create JKResyncButton and JKVideoButton with colocated loading state
+- [ ] 32-04-PLAN.md — Audit remaining state and verify re-render reduction
## Progress
@@ -107,7 +110,7 @@ Plans:
| 29. Context Optimization | v1.7 | 1/1 | ✓ Complete | 2026-03-05 |
| 30. Component Memoization | v1.7 | 1/1 | ✓ Complete | 2026-03-05 |
| 31. Selector Optimization | v1.7 | 1/1 | ✓ Complete | 2026-03-05 |
-| 32. State Update Optimization | v1.7 | 0/TBD | Not started | - |
+| 32. State Update Optimization | v1.7 | 0/4 | Planned | - |
---
*v1.7 roadmap created 2026-03-03*
diff --git a/.planning/phases/32-state-update-optimization/32-01-PLAN.md b/.planning/phases/32-state-update-optimization/32-01-PLAN.md
new file mode 100644
index 000000000..f6ba486ae
--- /dev/null
+++ b/.planning/phases/32-state-update-optimization/32-01-PLAN.md
@@ -0,0 +1,294 @@
+---
+phase: 32-state-update-optimization
+plan: 01
+type: execute
+wave: 1
+depends_on: []
+files_modified:
+ - jam-ui/src/components/client/JKSessionScreen.js
+ - jam-ui/src/hooks/useSessionModel.js
+ - jam-ui/src/hooks/useDebounceCallback.js
+autonomous: true
+
+must_haves:
+ truths:
+ - "Track sync fires once per session join (not 3 times)"
+ - "Debounce timer in trackChanges is stable across state changes"
+ - "Debounced callbacks read fresh state values"
+ artifacts:
+ - path: "jam-ui/src/hooks/useDebounceCallback.js"
+ provides: "Reusable ref-based debounce hook"
+ exports: ["useDebounceCallback"]
+ - path: "jam-ui/src/components/client/JKSessionScreen.js"
+ provides: "Single debounced track sync"
+ contains: "syncTracksDebounced"
+ - path: "jam-ui/src/hooks/useSessionModel.js"
+ provides: "Stable trackChanges debounce"
+ contains: "useDebounceCallback"
+ key_links:
+ - from: "jam-ui/src/components/client/JKSessionScreen.js"
+ to: "syncTracksToServer"
+ via: "single debounced call"
+ pattern: "useMemo.*debounce.*syncTracksToServer"
+ - from: "jam-ui/src/hooks/useSessionModel.js"
+ to: "useDebounceCallback"
+ via: "import and usage"
+ pattern: "useDebounceCallback.*trackChanges"
+---
+
+
+Fix redundant track sync calls and debounce instance recreation
+
+Purpose: Eliminate triple API calls on session join (STATE-01) and fix debounce timer reset on state changes (STATE-02). These are the two remaining redundant operation patterns identified in the investigation phase.
+
+Output: Single debounced track sync call, stable useDebounceCallback hook, refactored trackChanges handler
+
+
+
+@/Users/nuwan/.claude/get-shit-done/workflows/execute-plan.md
+@/Users/nuwan/.claude/get-shit-done/templates/summary.md
+
+
+
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/32-state-update-optimization/32-RESEARCH.md
+
+# Source files to modify
+@jam-ui/src/components/client/JKSessionScreen.js
+@jam-ui/src/hooks/useSessionModel.js
+
+
+
+
+
+ Task 1: Create useDebounceCallback hook
+ jam-ui/src/hooks/useDebounceCallback.js
+
+Create a new reusable hook that solves the stale closure problem with debounced callbacks:
+
+```javascript
+import { useRef, useEffect, useMemo } from 'react';
+import { debounce } from 'lodash';
+
+/**
+ * Hook that creates a stable debounced callback with fresh closure access.
+ * Solves the problem of debounce recreation when dependencies change.
+ *
+ * Pattern: useRef stores latest callback, useMemo creates debounce once.
+ * Source: https://www.developerway.com/posts/debouncing-in-react
+ *
+ * @param {Function} callback - The callback to debounce
+ * @param {number} delay - Debounce delay in ms (default: 500)
+ * @returns {Function} Debounced function that always uses latest callback
+ */
+export const useDebounceCallback = (callback, delay = 500) => {
+ const callbackRef = useRef(callback);
+
+ // Always keep ref current with latest callback
+ useEffect(() => {
+ callbackRef.current = callback;
+ }, [callback]);
+
+ // Create debounced function once - never recreated
+ const debouncedFn = useMemo(() =>
+ debounce((...args) => {
+ callbackRef.current?.(...args);
+ }, delay),
+ [delay] // Only recreate if delay changes
+ );
+
+ // Cleanup on unmount
+ useEffect(() => {
+ return () => debouncedFn.cancel();
+ }, [debouncedFn]);
+
+ return debouncedFn;
+};
+
+export default useDebounceCallback;
+```
+
+Key design decisions:
+- Uses useRef to store callback, keeping it always current
+- Uses useMemo with [delay] deps to create debounce function once
+- Handles cleanup on unmount via useEffect return
+- Exports both named and default for flexibility
+
+
+File exists at jam-ui/src/hooks/useDebounceCallback.js
+Exports useDebounceCallback function
+No ESLint errors: `cd jam-ui && npx eslint src/hooks/useDebounceCallback.js`
+
+
+useDebounceCallback hook created with ref-based pattern, ready for import in useSessionModel
+
+
+
+
+ Task 2: Consolidate track sync to single debounced call
+ jam-ui/src/components/client/JKSessionScreen.js
+
+Replace the triple setTimeout pattern (lines ~462-485) with a single debounced call.
+
+1. Add import for useMemo at top (if not already present)
+
+2. Find the current track sync useEffect (around lines 453-485):
+```javascript
+// Track sync: Sync tracks to server when session joined (3-call pattern matching legacy)
+useEffect(() => {
+ if (!hasJoined || !sessionId || !server?.clientId || !mixersReady) {
+ return;
+ }
+ const timer1 = setTimeout(() => { ... }, 1000);
+ const timer2 = setTimeout(() => { ... }, 1400);
+ const timer3 = setTimeout(() => { ... }, 6000);
+ return () => { clearTimeout(timer1); ... };
+}, [hasJoined, sessionId, mixersReady, dispatch])
+```
+
+3. Replace with single debounced call pattern:
+```javascript
+// Create stable debounced sync function
+const syncTracksDebounced = useMemo(() =>
+ debounce((sid, cid, d) => {
+ d(syncTracksToServer(sid, cid));
+ }, 1500), // 1.5s delay - adequate for mixer initialization
+ []
+);
+
+// Track sync: Single debounced call when session joined
+// Replaces legacy 3-timer pattern (1s, 1.4s, 6s) with single 1.5s debounced call
+useEffect(() => {
+ if (!hasJoined || !sessionId || !server?.clientId || !mixersReady) {
+ return;
+ }
+
+ // console.log('[Track Sync] Mixers ready, scheduling single debounced sync');
+ syncTracksDebounced(sessionId, server.clientId, dispatch);
+
+ return () => syncTracksDebounced.cancel();
+ // Note: server intentionally NOT in deps to avoid re-running on server reference changes
+ // eslint-disable-next-line react-hooks/exhaustive-deps
+}, [hasJoined, sessionId, mixersReady, dispatch, syncTracksDebounced]);
+```
+
+4. Add lodash debounce import if not present:
+```javascript
+import { debounce } from 'lodash';
+```
+
+Why 1.5s delay: Legacy used 1s, 1.4s, 6s. The first two calls at 1s and 1.4s were redundant. A single 1.5s debounced call covers the initial mixer setup window while preventing rapid repeated calls. The 6s call was likely for slow networks - if issues arise, this delay can be increased.
+
+
+Check the track sync useEffect has single debounce call:
+`grep -A 20 "Track sync:" jam-ui/src/components/client/JKSessionScreen.js`
+
+Verify no setTimeout pattern remains in that section:
+`grep -A 20 "Track sync:" jam-ui/src/components/client/JKSessionScreen.js | grep -c setTimeout` should be 0
+
+ESLint passes: `cd jam-ui && npx eslint src/components/client/JKSessionScreen.js --max-warnings=0`
+
+
+Track sync useEffect uses single debounced call instead of 3 setTimeout calls
+
+
+
+
+ Task 3: Fix trackChanges debounce in useSessionModel
+ jam-ui/src/hooks/useSessionModel.js
+
+Replace the useCallback-wrapped debounce with useDebounceCallback hook.
+
+1. Add import at top:
+```javascript
+import { useDebounceCallback } from './useDebounceCallback';
+```
+
+2. Find current trackChanges (around lines 604-614):
+```javascript
+// Track changes handler - debounced to prevent excessive session refreshes
+const trackChanges = useCallback(debounce((header, payload) => {
+ if (currentTrackChanges < payload.track_changes_counter) {
+ logger.debug("track_changes_counter = stale. refreshing...");
+ refreshCurrentSession();
+ } else {
+ if (header.type !== 'HEARTBEAT_ACK') {
+ logger.info("track_changes_counter = fresh. skipping refresh...", header, payload);
+ }
+ }
+}, 500), [currentTrackChanges, refreshCurrentSession]);
+```
+
+3. Replace with useDebounceCallback pattern:
+```javascript
+// Track changes handler - debounced to prevent excessive session refreshes
+// Uses useDebounceCallback for stable timer (doesn't reset when deps change)
+const trackChanges = useDebounceCallback((header, payload) => {
+ if (currentTrackChanges < payload.track_changes_counter) {
+ logger.debug("track_changes_counter = stale. refreshing...");
+ refreshCurrentSession();
+ } else {
+ if (header.type !== 'HEARTBEAT_ACK') {
+ logger.info("track_changes_counter = fresh. skipping refresh...", header, payload);
+ }
+ }
+}, 500);
+```
+
+Key changes:
+- Remove useCallback wrapper (useDebounceCallback handles memoization internally)
+- Remove debounce import call (it's inside useDebounceCallback)
+- Remove [currentTrackChanges, refreshCurrentSession] dependency array
+- The callback now always reads fresh values via ref closure
+- Timer is stable - won't reset on currentTrackChanges updates
+
+4. Remove lodash debounce import if no longer used elsewhere in file:
+Check for other usages first: `grep -n "debounce" useSessionModel.js`
+If trackChanges was the only use, remove: `import { debounce } from 'lodash';`
+If other usages exist, keep the import.
+
+
+trackChanges now uses useDebounceCallback:
+`grep -B 2 -A 10 "trackChanges = " jam-ui/src/hooks/useSessionModel.js | head -15`
+
+No useCallback wrapper on trackChanges:
+`grep "useCallback(debounce" jam-ui/src/hooks/useSessionModel.js | wc -l` should be 0
+
+ESLint passes: `cd jam-ui && npx eslint src/hooks/useSessionModel.js --max-warnings=0`
+
+
+trackChanges uses useDebounceCallback - timer stable across state changes, always reads fresh values
+
+
+
+
+
+
+1. Track sync fires once per session join:
+ - Grep for setTimeout in track sync section should return 0
+ - useMemo + debounce pattern present
+
+2. Debounce stability verified:
+ - useDebounceCallback hook exists with ref pattern
+ - trackChanges in useSessionModel uses useDebounceCallback
+ - No useCallback(debounce) pattern in useSessionModel
+
+3. All files pass ESLint:
+ ```bash
+ cd jam-ui && npx eslint src/hooks/useDebounceCallback.js src/hooks/useSessionModel.js src/components/client/JKSessionScreen.js --max-warnings=0
+ ```
+
+
+
+- [ ] useDebounceCallback.js created with ref-based debounce pattern
+- [ ] JKSessionScreen track sync uses single debounced call (not 3 setTimeout)
+- [ ] useSessionModel trackChanges uses useDebounceCallback (no dependency array recreation)
+- [ ] All modified files pass ESLint
+- [ ] No regressions - session join still works (manual verification if time permits)
+
+
+
diff --git a/.planning/phases/32-state-update-optimization/32-02-PLAN.md b/.planning/phases/32-state-update-optimization/32-02-PLAN.md
new file mode 100644
index 000000000..79d9f48c8
--- /dev/null
+++ b/.planning/phases/32-state-update-optimization/32-02-PLAN.md
@@ -0,0 +1,244 @@
+---
+phase: 32-state-update-optimization
+plan: 02
+type: execute
+wave: 1
+depends_on: []
+files_modified:
+ - jam-ui/src/hooks/useMixerHelper.js
+autonomous: true
+
+must_haves:
+ truths:
+ - "Mixer categorization doesn't dispatch when content unchanged"
+ - "Redux state only updates when mixer arrays meaningfully change"
+ - "Unchanged mixer list doesn't trigger downstream re-renders"
+ artifacts:
+ - path: "jam-ui/src/hooks/useMixerHelper.js"
+ provides: "Content comparison before dispatch"
+ contains: "mixerArraysEqual"
+ key_links:
+ - from: "jam-ui/src/hooks/useMixerHelper.js"
+ to: "setMetronomeTrackMixers"
+ via: "conditional dispatch"
+ pattern: "if.*!mixerArraysEqual.*dispatch"
+---
+
+
+Prevent redundant Redux dispatches in mixer categorization
+
+Purpose: Stop dispatching mixer category arrays when their content hasn't changed (STATE-03). Currently, every mixer state change triggers 5 category dispatches even if the categories haven't changed, causing unnecessary re-renders.
+
+Output: useMixerHelper with content comparison before each category dispatch
+
+
+
+@/Users/nuwan/.claude/get-shit-done/workflows/execute-plan.md
+@/Users/nuwan/.claude/get-shit-done/templates/summary.md
+
+
+
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/32-state-update-optimization/32-RESEARCH.md
+
+# Source file to modify
+@jam-ui/src/hooks/useMixerHelper.js
+@jam-ui/src/store/features/mixersSlice.js
+
+
+
+
+
+ Task 1: Add mixer array comparison helper
+ jam-ui/src/hooks/useMixerHelper.js
+
+Add a helper function to compare mixer arrays by their IDs. Place this near the top of the file, after imports but before the hook function.
+
+```javascript
+/**
+ * Compare two mixer arrays by their IDs to determine if content changed.
+ * Used to prevent unnecessary Redux dispatches when categorizing mixers.
+ *
+ * @param {Array} prev - Previous mixer array
+ * @param {Array} next - New mixer array
+ * @returns {boolean} True if arrays have same content (by ID)
+ */
+const mixerArraysEqual = (prev, next) => {
+ // Same reference = definitely equal
+ if (prev === next) return true;
+
+ // Different lengths = definitely not equal
+ if (!prev || !next || prev.length !== next.length) return false;
+
+ // Compare by mixer pair IDs (master.id + personal.id creates unique pair key)
+ const getIds = (arr) => arr
+ .map(pair => `${pair.master?.id || ''}-${pair.personal?.id || ''}`)
+ .sort()
+ .join(',');
+
+ return getIds(prev) === getIds(next);
+};
+```
+
+Why ID-based comparison:
+- Mixer objects have stable `id` fields
+- Deep comparison with JSON.stringify is slow and fragile
+- We only care if the set of mixers changed, not individual properties
+- Master/personal pair creates unique identifier
+
+
+Helper function exists:
+`grep -A 10 "mixerArraysEqual" jam-ui/src/hooks/useMixerHelper.js | head -15`
+
+
+mixerArraysEqual helper function added to useMixerHelper.js
+
+
+
+
+ Task 2: Add selectors for current category state
+ jam-ui/src/hooks/useMixerHelper.js
+
+Import the category selectors and add refs to track previous values. Find the existing selector imports and add the category selectors.
+
+1. Update imports from mixersSlice (around line 10-30):
+```javascript
+import {
+ // ... existing imports ...
+ selectMetronomeTrackMixers,
+ selectBackingTrackMixers,
+ selectJamTrackMixers,
+ selectRecordingTrackMixers,
+ selectAdhocTrackMixers,
+} from '../store/features/mixersSlice';
+```
+
+2. Inside the useMixerHelper function, add useRef to track previous values. Place this near other refs/selectors:
+```javascript
+// Track previous category values for comparison
+const prevCategoriesRef = useRef({
+ metronome: [],
+ backing: [],
+ jam: [],
+ recording: [],
+ adhoc: []
+});
+```
+
+Note: We use a ref instead of selectors to avoid circular updates. The ref stores the last dispatched values so we can compare before dispatching again.
+
+
+Category selectors imported:
+`grep "selectMetronomeTrackMixers\|selectBackingTrackMixers" jam-ui/src/hooks/useMixerHelper.js | head -5`
+
+prevCategoriesRef defined:
+`grep "prevCategoriesRef" jam-ui/src/hooks/useMixerHelper.js | head -3`
+
+
+Category selectors imported and prevCategoriesRef added
+
+
+
+
+ Task 3: Add conditional dispatch to categorization useEffect
+ jam-ui/src/hooks/useMixerHelper.js
+
+Modify the categorization useEffect (around lines 236-297) to only dispatch when content changes.
+
+Find the current dispatch block:
+```javascript
+// Dispatch to Redux
+dispatch(setMetronomeTrackMixers(metronomeTrackMixers));
+dispatch(setBackingTrackMixers(backingTrackMixers));
+dispatch(setJamTrackMixers(jamTrackMixers));
+dispatch(setRecordingTrackMixers(recordingTrackMixers));
+dispatch(setAdhocTrackMixers(adhocTrackMixers));
+```
+
+Replace with conditional dispatches:
+```javascript
+// Dispatch to Redux ONLY if content changed
+// This prevents unnecessary re-renders when mixer objects change but categories stay same
+
+if (!mixerArraysEqual(prevCategoriesRef.current.metronome, metronomeTrackMixers)) {
+ console.log('[useMixerHelper] Metronome mixers changed, dispatching');
+ dispatch(setMetronomeTrackMixers(metronomeTrackMixers));
+ prevCategoriesRef.current.metronome = metronomeTrackMixers;
+}
+
+if (!mixerArraysEqual(prevCategoriesRef.current.backing, backingTrackMixers)) {
+ console.log('[useMixerHelper] Backing track mixers changed, dispatching');
+ dispatch(setBackingTrackMixers(backingTrackMixers));
+ prevCategoriesRef.current.backing = backingTrackMixers;
+}
+
+if (!mixerArraysEqual(prevCategoriesRef.current.jam, jamTrackMixers)) {
+ console.log('[useMixerHelper] Jam track mixers changed, dispatching');
+ dispatch(setJamTrackMixers(jamTrackMixers));
+ prevCategoriesRef.current.jam = jamTrackMixers;
+}
+
+if (!mixerArraysEqual(prevCategoriesRef.current.recording, recordingTrackMixers)) {
+ console.log('[useMixerHelper] Recording mixers changed, dispatching');
+ dispatch(setRecordingTrackMixers(recordingTrackMixers));
+ prevCategoriesRef.current.recording = recordingTrackMixers;
+}
+
+if (!mixerArraysEqual(prevCategoriesRef.current.adhoc, adhocTrackMixers)) {
+ console.log('[useMixerHelper] Adhoc mixers changed, dispatching');
+ dispatch(setAdhocTrackMixers(adhocTrackMixers));
+ prevCategoriesRef.current.adhoc = adhocTrackMixers;
+}
+```
+
+Note: Console logs are useful for debugging but can be commented out in production. They help verify that dispatches are being skipped when expected.
+
+
+Conditional dispatch pattern present:
+`grep -A 3 "mixerArraysEqual.*metronome" jam-ui/src/hooks/useMixerHelper.js | head -5`
+
+All 5 categories have conditional checks:
+`grep -c "mixerArraysEqual.*prevCategoriesRef" jam-ui/src/hooks/useMixerHelper.js` should be 5
+
+ESLint passes:
+`cd jam-ui && npx eslint src/hooks/useMixerHelper.js --max-warnings=0`
+
+
+Mixer categorization only dispatches when content changes, tracked via prevCategoriesRef
+
+
+
+
+
+
+1. Helper function added:
+ ```bash
+ grep -c "mixerArraysEqual" jam-ui/src/hooks/useMixerHelper.js
+ ```
+ Should return at least 6 (1 definition + 5 usages)
+
+2. Conditional dispatch pattern:
+ ```bash
+ grep "if (!mixerArraysEqual" jam-ui/src/hooks/useMixerHelper.js | wc -l
+ ```
+ Should return 5
+
+3. ESLint clean:
+ ```bash
+ cd jam-ui && npx eslint src/hooks/useMixerHelper.js --max-warnings=0
+ ```
+
+
+
+- [ ] mixerArraysEqual helper function created
+- [ ] prevCategoriesRef tracks previously dispatched values
+- [ ] All 5 category dispatches use conditional check
+- [ ] prevCategoriesRef updated only when dispatch occurs
+- [ ] ESLint passes with no warnings
+
+
+
diff --git a/.planning/phases/32-state-update-optimization/32-03-PLAN.md b/.planning/phases/32-state-update-optimization/32-03-PLAN.md
new file mode 100644
index 000000000..96aa4e6b5
--- /dev/null
+++ b/.planning/phases/32-state-update-optimization/32-03-PLAN.md
@@ -0,0 +1,393 @@
+---
+phase: 32-state-update-optimization
+plan: 03
+type: execute
+wave: 1
+depends_on: []
+files_modified:
+ - jam-ui/src/components/client/JKSessionScreen.js
+ - jam-ui/src/components/client/JKResyncButton.js
+ - jam-ui/src/components/client/JKVideoButton.js
+autonomous: true
+
+must_haves:
+ truths:
+ - "resyncLoading state lives in JKResyncButton (not JKSessionScreen)"
+ - "videoLoading state lives in JKVideoButton (not JKSessionScreen)"
+ - "Loading state changes don't re-render JKSessionScreen"
+ artifacts:
+ - path: "jam-ui/src/components/client/JKResyncButton.js"
+ provides: "Self-contained resync button with loading state"
+ exports: ["JKResyncButton"]
+ - path: "jam-ui/src/components/client/JKVideoButton.js"
+ provides: "Self-contained video button with loading state"
+ exports: ["JKVideoButton"]
+ - path: "jam-ui/src/components/client/JKSessionScreen.js"
+ provides: "Uses extracted button components"
+ contains: "JKResyncButton"
+ key_links:
+ - from: "jam-ui/src/components/client/JKSessionScreen.js"
+ to: "JKResyncButton"
+ via: "import and render"
+ pattern: "
+Colocate loading states to button components
+
+Purpose: Move resyncLoading (COLOC-01) and videoLoading (COLOC-02) from JKSessionScreen to their respective button components. This follows state colocation principles - state should live in the component that uses it, preventing parent re-renders.
+
+Output: JKResyncButton and JKVideoButton components with colocated loading state, JKSessionScreen simplified
+
+
+
+@/Users/nuwan/.claude/get-shit-done/workflows/execute-plan.md
+@/Users/nuwan/.claude/get-shit-done/templates/summary.md
+
+
+
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/32-state-update-optimization/32-RESEARCH.md
+
+# Source files
+@jam-ui/src/components/client/JKSessionScreen.js
+
+
+
+
+
+ Task 1: Create JKResyncButton component
+ jam-ui/src/components/client/JKResyncButton.js
+
+Create a new self-contained button component with colocated loading state.
+
+```javascript
+import React, { useState, useCallback, memo } from 'react';
+import { Button, Spinner } from 'reactstrap';
+import { toast } from 'react-toastify';
+import PropTypes from 'prop-types';
+
+/**
+ * Self-contained resync button with colocated loading state.
+ * Loading state changes only re-render this component, not the parent.
+ *
+ * State colocation: https://kentcdodds.com/blog/state-colocation-will-make-your-react-app-faster
+ */
+const JKResyncButton = memo(({ resyncAudio, className }) => {
+ const [loading, setLoading] = useState(false);
+
+ const handleClick = useCallback(async (e) => {
+ e.preventDefault();
+ if (loading) return;
+
+ setLoading(true);
+ try {
+ await resyncAudio();
+ // Silent success (matches legacy behavior)
+ } catch (error) {
+ if (error.message === 'timeout') {
+ toast.error('Audio resync timed out. Please try again.');
+ } else {
+ toast.error('Audio resync failed: ' + (error.message || 'Unknown error'));
+ }
+ } finally {
+ setLoading(false);
+ }
+ }, [resyncAudio, loading]);
+
+ return (
+
+ );
+});
+
+JKResyncButton.displayName = 'JKResyncButton';
+
+JKResyncButton.propTypes = {
+ resyncAudio: PropTypes.func.isRequired,
+ className: PropTypes.string
+};
+
+export default JKResyncButton;
+```
+
+Key design decisions:
+- memo() wrapper prevents re-renders from parent prop stability
+- Loading state is local - changes don't propagate up
+- Same error handling as original handleResync
+- displayName for React DevTools debugging
+- PropTypes for documentation
+
+
+File exists and exports component:
+`ls -la jam-ui/src/components/client/JKResyncButton.js`
+
+Has useState for loading:
+`grep "useState(false)" jam-ui/src/components/client/JKResyncButton.js`
+
+Has memo wrapper:
+`grep "memo(" jam-ui/src/components/client/JKResyncButton.js`
+
+
+JKResyncButton component created with colocated loading state
+
+
+
+
+ Task 2: Create JKVideoButton component
+ jam-ui/src/components/client/JKVideoButton.js
+
+Create a new self-contained video button component with colocated loading state.
+
+```javascript
+import React, { useState, useCallback, memo } from 'react';
+import { Button, Spinner } from 'reactstrap';
+import { toast } from 'react-toastify';
+import PropTypes from 'prop-types';
+import videoIcon from '../../assets/images/icons8-video-call-50.png';
+
+/**
+ * Self-contained video button with colocated loading state.
+ * Loading state changes only re-render this component, not the parent.
+ *
+ * State colocation: https://kentcdodds.com/blog/state-colocation-will-make-your-react-app-faster
+ */
+const JKVideoButton = memo(({
+ canVideo,
+ getVideoUrl,
+ onUpgradePrompt,
+ className
+}) => {
+ const [loading, setLoading] = useState(false);
+
+ // Open external link in new window/tab
+ const openExternalLink = useCallback((url) => {
+ window.open(url, '_blank', 'noopener,noreferrer');
+ }, []);
+
+ const handleClick = useCallback(async () => {
+ if (!canVideo()) {
+ onUpgradePrompt();
+ return;
+ }
+
+ try {
+ setLoading(true);
+
+ // Get video conferencing room URL from server
+ const response = await getVideoUrl();
+ const videoUrl = `${response.url}&audiooff=true`;
+
+ // Open video URL in new browser window/tab
+ openExternalLink(videoUrl);
+
+ } catch (error) {
+ toast.error('Failed to start video session');
+ } finally {
+ // Keep loading state for 10 seconds to prevent multiple clicks
+ setTimeout(() => setLoading(false), 10000);
+ }
+ }, [canVideo, getVideoUrl, onUpgradePrompt, openExternalLink]);
+
+ return (
+
+ );
+});
+
+JKVideoButton.displayName = 'JKVideoButton';
+
+JKVideoButton.propTypes = {
+ canVideo: PropTypes.func.isRequired,
+ getVideoUrl: PropTypes.func.isRequired,
+ onUpgradePrompt: PropTypes.func.isRequired,
+ className: PropTypes.string
+};
+
+export default JKVideoButton;
+```
+
+Key design decisions:
+- 10-second loading timeout preserved from original
+- canVideo and onUpgradePrompt as props for flexibility
+- Video icon imported directly (same path as original)
+- memo() for render optimization
+
+
+File exists and exports component:
+`ls -la jam-ui/src/components/client/JKVideoButton.js`
+
+Has useState for loading:
+`grep "useState(false)" jam-ui/src/components/client/JKVideoButton.js`
+
+Has 10-second timeout:
+`grep "10000" jam-ui/src/components/client/JKVideoButton.js`
+
+
+JKVideoButton component created with colocated loading state
+
+
+
+
+ Task 3: Refactor JKSessionScreen to use extracted components
+ jam-ui/src/components/client/JKSessionScreen.js
+
+Replace inline button implementations with the new components.
+
+1. Add imports at top:
+```javascript
+import JKResyncButton from './JKResyncButton';
+import JKVideoButton from './JKVideoButton';
+```
+
+2. Remove useState declarations (around lines 202-205):
+```javascript
+// DELETE these lines:
+const [videoLoading, setVideoLoading] = useState(false);
+const [resyncLoading, setResyncLoading] = useState(false);
+```
+
+3. Remove handleResync function (around lines 1056-1075):
+```javascript
+// DELETE the entire handleResync function
+// const handleResync = useCallback(async (e) => { ... });
+```
+
+4. Remove handleVideoClick function (around lines 977-1002):
+```javascript
+// DELETE the entire handleVideoClick function
+// const handleVideoClick = async () => { ... };
+```
+
+5. Update the button JSX in the toolbar section (around lines 1341-1388).
+
+Find the Video button:
+```jsx
+
+```
+
+Replace with:
+```jsx
+ getVideoConferencingRoomUrl(currentSession.id)}
+ onUpgradePrompt={showVideoUpgradePrompt}
+/>
+```
+
+Find the Resync button:
+```jsx
+
+```
+
+Replace with:
+```jsx
+
+```
+
+6. Keep the following functions in JKSessionScreen (they're still needed):
+- `canVideo` (permission check)
+- `showVideoUpgradePrompt` (toast display)
+- `resyncAudio` (from useMediaActions)
+
+7. Remove videoIcon import if no longer used elsewhere:
+```javascript
+// Check if videoIcon is used elsewhere, if not remove:
+// import videoIcon from '../../assets/images/icons8-video-call-50.png';
+```
+
+
+New components imported:
+`grep "JKResyncButton\|JKVideoButton" jam-ui/src/components/client/JKSessionScreen.js | head -5`
+
+Old state removed:
+`grep "videoLoading\|resyncLoading" jam-ui/src/components/client/JKSessionScreen.js | wc -l` should be 0
+
+Components used in JSX:
+`grep "
+
+JKSessionScreen refactored to use JKResyncButton and JKVideoButton, loading state no longer in parent
+
+
+
+
+
+
+1. New components exist:
+ ```bash
+ ls -la jam-ui/src/components/client/JKResyncButton.js jam-ui/src/components/client/JKVideoButton.js
+ ```
+
+2. Loading state removed from JKSessionScreen:
+ ```bash
+ grep -c "videoLoading\|resyncLoading" jam-ui/src/components/client/JKSessionScreen.js
+ ```
+ Should return 0
+
+3. Components used:
+ ```bash
+ grep "
+
+
+- [ ] JKResyncButton.js created with local loading state
+- [ ] JKVideoButton.js created with local loading state
+- [ ] JKSessionScreen imports and uses both new components
+- [ ] videoLoading and resyncLoading useState removed from JKSessionScreen
+- [ ] handleResync and handleVideoClick removed from JKSessionScreen
+- [ ] All files pass ESLint
+
+
+
diff --git a/.planning/phases/32-state-update-optimization/32-04-PLAN.md b/.planning/phases/32-state-update-optimization/32-04-PLAN.md
new file mode 100644
index 000000000..e808f834e
--- /dev/null
+++ b/.planning/phases/32-state-update-optimization/32-04-PLAN.md
@@ -0,0 +1,223 @@
+---
+phase: 32-state-update-optimization
+plan: 04
+type: execute
+wave: 2
+depends_on: ["32-03"]
+files_modified:
+ - jam-ui/src/components/client/JKSessionScreen.js
+autonomous: false
+
+must_haves:
+ truths:
+ - "Local state audit completed with documented findings"
+ - "Any additional colocation candidates identified and addressed"
+ - "JKSessionScreen re-render count measurably reduced"
+ artifacts:
+ - path: ".planning/phases/32-state-update-optimization/32-04-SUMMARY.md"
+ provides: "Audit results and re-render measurements"
+ contains: "State Colocation Audit"
+---
+
+
+Audit JKSessionScreen local state and verify re-render reduction
+
+Purpose: Complete COLOC-03 requirement by auditing remaining useState declarations in JKSessionScreen, identifying any additional colocation candidates, and measuring the re-render improvement from Phase 32 changes.
+
+Output: Audit documentation, any additional colocations if applicable, before/after re-render measurements
+
+
+
+@/Users/nuwan/.claude/get-shit-done/workflows/execute-plan.md
+@/Users/nuwan/.claude/get-shit-done/templates/summary.md
+
+
+
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/32-state-update-optimization/32-RESEARCH.md
+
+# Prior plan summary needed for context
+@.planning/phases/32-state-update-optimization/32-03-SUMMARY.md
+
+# Source file to audit
+@jam-ui/src/components/client/JKSessionScreen.js
+
+
+
+
+
+ Task 1: Audit remaining useState declarations
+ jam-ui/src/components/client/JKSessionScreen.js
+
+Analyze all remaining useState declarations in JKSessionScreen after Plan 03 changes.
+
+1. List all useState declarations:
+```bash
+grep -n "useState" jam-ui/src/components/client/JKSessionScreen.js
+```
+
+2. For each state variable, document:
+ - Name and purpose
+ - Where it's used (components that read it)
+ - Whether it could be colocated to a child component
+ - Decision: KEEP (used by multiple children or parent logic) or CANDIDATE (single child usage)
+
+Expected states after Plan 03 (with videoLoading/resyncLoading removed):
+- volumeLevel - Used in volume modal, could be colocated to JKSessionVolumeModal
+- leaveRating - Used in leave modal flow
+- leaveComments - Used in leave modal flow
+- leaveLoading - Used in leave modal button
+
+3. Analyze each candidate:
+ - volumeLevel: Shared between slider and display, modal handles both - KEEP (modal manages its own state)
+ - leaveRating/leaveComments/leaveLoading: All used within leave modal flow
+ - These could potentially move to JKSessionLeaveModal
+ - But leave modal may need values from parent for submit
+ - Decision: Document as FUTURE CANDIDATE - not critical path for this phase
+
+4. Record findings in task output for summary.
+
+
+Review useState declarations present:
+`grep -c "useState" jam-ui/src/components/client/JKSessionScreen.js`
+
+Verify videoLoading/resyncLoading removed (should be 0):
+`grep -c "videoLoading\|resyncLoading" jam-ui/src/components/client/JKSessionScreen.js`
+
+
+useState audit completed with documented decisions for each state variable
+
+
+
+
+ Task 2: Document re-render measurement approach
+ jam-ui/src/components/client/JKSessionScreen.js
+
+Add a temporary render counter for measurement purposes. This will be removed after verification.
+
+1. Add render counter at the beginning of the JKSessionScreen function body:
+```javascript
+// TEMPORARY: Render counter for Phase 32 verification
+// Remove after verifying optimization
+const renderCountRef = React.useRef(0);
+renderCountRef.current += 1;
+if (process.env.NODE_ENV === 'development') {
+ console.log(`[JKSessionScreen] Render #${renderCountRef.current}`);
+}
+```
+
+2. Document in the summary how to measure:
+ - Open React DevTools Profiler
+ - Start recording
+ - Join a session (triggers track sync and mixer setup)
+ - Wait 10 seconds for stabilization
+ - Stop recording
+ - Check JKSessionScreen render count
+ - Compare with expected reduction (baseline was ~20-30 renders on join, target is 50%+ reduction)
+
+3. The success criteria from roadmap: "JKSessionScreen re-render count reduced by 50%+"
+ - This measurement is a checkpoint for the user to verify
+ - Document expected numbers in summary
+
+
+Render counter present (for now):
+`grep "renderCountRef" jam-ui/src/components/client/JKSessionScreen.js | head -3`
+
+Counter only logs in development:
+`grep "NODE_ENV.*development" jam-ui/src/components/client/JKSessionScreen.js`
+
+
+Render counter added for measurement, documentation of measurement approach prepared
+
+
+
+
+
+Phase 32 state update optimizations:
+1. Single debounced track sync (replacing 3 setTimeout calls)
+2. Stable useDebounceCallback hook for trackChanges
+3. Conditional dispatch in mixer categorization
+4. JKResyncButton with colocated loading state
+5. JKVideoButton with colocated loading state
+6. State colocation audit completed
+
+
+1. **Functional verification:**
+ - Start jam-ui: `cd jam-ui && npm run start`
+ - Log in and join a session
+ - Verify session loads correctly
+ - Click Resync button - should show loading spinner
+ - Click Video button - should open video conferencing
+
+2. **Re-render measurement:**
+ - Open React DevTools in browser (F12 -> Profiler tab)
+ - Click "Start profiling"
+ - Join a new session (or refresh current session)
+ - Wait 10 seconds
+ - Click "Stop profiling"
+ - Look at JKSessionScreen render count
+ - Expected: Significantly fewer renders than before (target: 50%+ reduction)
+ - Check console for `[JKSessionScreen] Render #X` logs
+
+3. **Track sync verification:**
+ - Open Network tab in DevTools
+ - Join a session
+ - Filter by "track" in network requests
+ - Should see only ONE track sync call (not 3)
+
+4. **Console verification:**
+ - After joining session, check console for:
+ - `[Track Sync] Mixers ready, scheduling single debounced sync` (if uncommented)
+ - `[useMixerHelper] Metronome mixers changed, dispatching` (on first categorization)
+ - Subsequent mixer updates should NOT log dispatch messages
+
+5. **Remove render counter:**
+ - After verification, the render counter can be removed from JKSessionScreen
+ - Or keep for ongoing monitoring (your preference)
+
+
+Type "approved" if:
+- Session joins and works correctly
+- Buttons function as expected
+- Re-render count is measurably reduced
+- Track sync fires once (not 3 times)
+
+Or describe any issues found.
+
+
+
+
+
+
+1. Audit completed (Task 1):
+ - All useState documented with decisions
+ - No missed colocation opportunities for this phase
+
+2. Measurement approach documented (Task 2):
+ - Render counter added
+ - Steps for measuring improvement clear
+
+3. Human verification (Task 3):
+ - Functional tests pass
+ - Performance improvement confirmed
+
+
+
+- [ ] All useState declarations audited and documented
+- [ ] Render counter added for measurement
+- [ ] User verifies session join works
+- [ ] User verifies buttons work
+- [ ] User confirms re-render reduction (50%+ target)
+- [ ] Track sync fires once per session join
+
+
+