diff --git a/CODEBASE_REVIEW.md b/CODEBASE_REVIEW.md
deleted file mode 100644
index 38e42b2..0000000
--- a/CODEBASE_REVIEW.md
+++ /dev/null
@@ -1,54 +0,0 @@
-# Codebase Review — 2026-02-26
-
-Findings from full codebase review. Items ordered by priority within each category.
-
-## Stability (Critical)
-
-- [x] **Fatal loop exception leaks resources** — Added outer `try/except/finally` with `self._running = False` to all 10 processing loop methods across `live_stream.py`, `color_strip_stream.py`, `effect_stream.py`, `audio_stream.py`, `composite_stream.py`, `mapped_stream.py`. Also added per-iteration `try/except` where missing.
-- [x] **`_is_running` flag cleanup** — Fixed via `finally: self._running = False` in all loop methods. *(Race condition via `threading.Event` deferred — current pattern sufficient with the finally block.)*
-- [x] **`ColorStripStreamManager` thread safety** — **FALSE POSITIVE**: All access is from the async event loop; methods are synchronous with no `await` points, so no preemption is possible.
-- [x] **Audio `stream.stop()` called under lock** — Moved `stream.stop()` outside lock scope in both `release()` and `release_all()` in `audio_capture.py`.
-- [x] **WS accept-before-validate** — **FALSE POSITIVE**: All WS endpoints validate auth and resolve configs BEFORE calling `websocket.accept()`.
-- [x] **Capture error no-backoff** — Added consecutive error counter with exponential backoff (`min(1.0, 0.1 * (errors - 5))`) in `ScreenCaptureLiveStream._capture_loop()`.
-- [ ] **WGC session close not detected** — Deferred (Windows-specific edge case, low priority).
-- [x] **`LiveStreamManager.acquire()` not thread-safe** — **FALSE POSITIVE**: Same as ColorStripStreamManager — all access from async event loop, no await in methods.
-
-## Performance (High Impact)
-
-- [x] **Per-pixel Python loop in `send_pixels()`** — Replaced per-pixel Python loop with `np.array().tobytes()` in `ddp_client.py`. Hot path already uses `send_pixels_numpy()`.
-- [ ] **WGC 6MB frame allocation per callback** — Deferred (Windows-specific, requires WGC API changes).
-- [x] **Gradient rendering O(LEDs×Stops) Python loop** — Vectorized with NumPy: `np.searchsorted` for stop lookup + vectorized interpolation in `_compute_gradient_colors()`.
-- [x] **`PixelateFilter` nested Python loop** — Replaced with `cv2.resize` down (INTER_AREA) + up (INTER_NEAREST) — pure C++ backend.
-- [x] **`DownscalerFilter` double allocation** — **FALSE POSITIVE**: Already uses single `cv2.resize()` call (vectorized C++).
-- [x] **`SaturationFilter` ~25MB temp arrays** — **FALSE POSITIVE**: Already uses pre-allocated scratch buffer and vectorized in-place numpy.
-- [x] **`FrameInterpolationFilter` copies full image** — **FALSE POSITIVE**: Already uses vectorized numpy integer blending with image pool.
-- [x] **`datetime.utcnow()` per frame** — **LOW IMPACT**: ~1-2μs per call, negligible at 60fps. Deprecation tracked under Backend Quality.
-- [x] **Unbounded diagnostic lists** — **FALSE POSITIVE**: Lists are cleared every 5 seconds (~300 entries max at 60fps). Trivial memory.
-
-## Frontend Quality
-
-- [x] **`lockBody()`/`unlockBody()` not re-entrant** — Added `_lockCount` reference counter and `_savedScrollY` in `ui.js`. First lock saves scroll, last unlock restores.
-- [x] **XSS via unescaped engine config keys** — **FALSE POSITIVE**: Both capture template and audio template card renderers already use `escapeHtml()` on keys and values.
-- [x] **LED preview WS `onclose` not nulled** — Added `ws.onclose = null` before `ws.close()` in `disconnectLedPreviewWS()` in `targets.js`.
-- [x] **`fetchWithAuth` retry adds duplicate listeners** — Added `{ once: true }` to abort signal listener in `api.js`.
-- [x] **Audio `requestAnimationFrame` loop continues after WS close** — **FALSE POSITIVE**: Loop already checks `testAudioModal.isOpen` before scheduling next frame, and `_cleanupTest()` cancels the animation frame.
-
-## Backend Quality
-
-- [ ] **No thread-safety in `JsonStore`** — Deferred (low risk — all stores are accessed from async event loop).
-- [x] **Auth token prefix logged** — Removed token prefix from log message in `auth.py`. Now logs only "Invalid API key attempt".
-- [ ] **Duplicate capture/test code** — Deferred (code duplication, not a bug — refactoring would reduce LOC but doesn't fix a defect).
-- [x] **Update methods allow duplicate names** — Added name uniqueness checks to `update_template` in `template_store.py`, `postprocessing_template_store.py`, `audio_template_store.py`, `pattern_template_store.py`, and `update_profile` in `profile_store.py`. Also added missing check to `create_profile`.
-- [ ] **Routes access `manager._private` attrs** — Deferred (stylistic, not a bug — would require adding public accessor methods).
-- [x] **Non-atomic file writes** — Created `utils/file_ops.py` with `atomic_write_json()` helper (tempfile + `os.replace`). Updated all 10 store files.
-- [ ] **444 f-string logger calls** — Deferred (performance impact negligible — Python evaluates f-strings very fast; lazy `%s` formatting only matters at very high call rates).
-- [x] **`get_source()` silent bug** — Fixed: `color_strip_sources.py:_resolve_display_index()` called `picture_source_store.get_source()` which doesn't exist (should be `get_stream()`). Was silently returning `0` for display index.
-- [ ] **`get_config()` race** — Deferred (low risk — config changes are infrequent user-initiated operations).
-- [ ] **`datetime.utcnow()` deprecated** — Deferred (functional, deprecation warning only appears in Python 3.12+).
-- [x] **Inconsistent DELETE status codes** — Changed `audio_sources.py` and `value_sources.py` DELETE endpoints from 200 to 204 (matching all other DELETE endpoints).
-
-## Architecture (Observations, no action needed)
-
-**Strengths**: Clean layered design, plugin registries, reference-counted stream sharing, consistent API patterns.
-
-**Weaknesses**: No backpressure (slow consumers buffer frames), thread count grows linearly, config global singleton, reference counting races.
diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..44cb450
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,38 @@
+# Pending Features & Issues
+
+Priority: `P1` quick win · `P2` moderate · `P3` large effort
+
+## Processing Pipeline
+
+- [ ] `P1` **Noise gate** — Suppress small color changes below threshold, preventing shimmer on static content
+- [ ] `P1` **Color temperature filter** — Warm/cool shift separate from hue shift (circadian/mood)
+- [ ] `P1` **Zone grouping** — Merge adjacent LEDs into logical groups sharing one averaged color
+- [ ] `P2` **Palette quantization** — Force output to match a user-defined palette
+- [ ] `P2` **Drag-and-drop filter ordering** — Reorder postprocessing filter chains visually
+- [ ] `P3` **Transition effects** — Crossfade, wipe, or dissolve between sources/profiles instead of instant cut
+
+## Output Targets
+
+- [ ] `P1` **Rename `picture-targets` to `output-targets`** — Rename API endpoints and internal references for clarity
+- [ ] `P2` **OpenRGB** — Control PC peripherals (keyboard, mouse, RAM, fans) as ambient targets
+- [ ] `P2` **Art-Net / sACN (E1.31)** — Stage/theatrical lighting protocols, DMX controllers
+
+## Automation & Integration
+
+- [ ] `P2` **Webhook/MQTT trigger** — Let external systems activate profiles without HA integration
+- [ ] `P2` **WebSocket event bus** — Broadcast all state changes over a single WS channel
+- [ ] `P3` **Notification reactive** — Flash/pulse on OS notifications (optional app filter)
+
+## Multi-Display
+
+- [ ] `P2` **Investigate multimonitor support** — Research and plan support for multi-monitor setups
+- [ ] `P3` **Multi-display unification** — Treat 2-3 monitors as single virtual display for seamless ambilight
+
+## Capture Engines
+
+- [ ] `P3` **SCRCPY capture engine** — Implement SCRCPY-based screen capture for Android devices
+- [ ] `P3` **Camera / webcam** — Border-sampling from camera feed for video calls or room-reactive lighting
+
+## UX
+
+- [ ] `P3` **PWA / mobile layout** — Mobile-first layout + "Add to Home Screen" manifest
diff --git a/server/src/wled_controller/static/css/streams.css b/server/src/wled_controller/static/css/streams.css
index 4a28b27..085a086 100644
--- a/server/src/wled_controller/static/css/streams.css
+++ b/server/src/wled_controller/static/css/streams.css
@@ -682,10 +682,22 @@
     flex-shrink: 0;
 }
 
-.cs-collapsed .cs-filter-wrap {
+.cs-collapsed .cs-filter-wrap,
+.cs-collapsed .cs-header-extra {
     display: none;
 }
 
+.cs-header-extra {
+    display: flex;
+    align-items: center;
+}
+
+.cs-header-extra .btn {
+    padding: 2px 8px;
+    font-size: 0.75rem;
+    line-height: 1;
+}
+
 .cs-filter-wrap {
     position: relative;
     margin-left: auto;
diff --git a/server/src/wled_controller/static/js/app.js b/server/src/wled_controller/static/js/app.js
index b101b82..1f894a2 100644
--- a/server/src/wled_controller/static/js/app.js
+++ b/server/src/wled_controller/static/js/app.js
@@ -97,6 +97,7 @@ import {
     loadTargetsTab, switchTargetSubTab,
     showTargetEditor, closeTargetEditorModal, forceCloseTargetEditorModal, saveTargetEditor,
     startTargetProcessing, stopTargetProcessing,
+    stopAllLedTargets, stopAllKCTargets,
     startTargetOverlay, stopTargetOverlay, deleteTarget,
     cloneTarget, toggleLedPreview, toggleTargetAutoStart,
     expandAllTargetSections, collapseAllTargetSections,
@@ -343,6 +344,8 @@ Object.assign(window, {
     saveTargetEditor,
     startTargetProcessing,
     stopTargetProcessing,
+    stopAllLedTargets,
+    stopAllKCTargets,
     startTargetOverlay,
     stopTargetOverlay,
     deleteTarget,
diff --git a/server/src/wled_controller/static/js/core/card-sections.js b/server/src/wled_controller/static/js/core/card-sections.js
index 02b5413..22c1a2d 100644
--- a/server/src/wled_controller/static/js/core/card-sections.js
+++ b/server/src/wled_controller/static/js/core/card-sections.js
@@ -43,13 +43,15 @@ export class CardSection {
      * @param {string} opts.gridClass      CSS class for the card grid: 'devices-grid' | 'templates-grid'
      * @param {string} [opts.addCardOnclick] onclick handler string for the "+" add card
      * @param {string} [opts.keyAttr]      data attribute that uniquely identifies cards (e.g. 'data-device-id')
+     * @param {string} [opts.headerExtra]  Extra HTML injected between count badge and filter (e.g. action buttons)
      */
-    constructor(sectionKey, { titleKey, gridClass, addCardOnclick, keyAttr }) {
+    constructor(sectionKey, { titleKey, gridClass, addCardOnclick, keyAttr, headerExtra }) {
         this.sectionKey = sectionKey;
         this.titleKey = titleKey;
         this.gridClass = gridClass;
         this.addCardOnclick = addCardOnclick || '';
         this.keyAttr = keyAttr || '';
+        this.headerExtra = headerExtra || '';
         this._filterValue = '';
         this._lastItems = null;
         this._dragState = null;
@@ -86,6 +88,7 @@ export class CardSection {
                 <span class="cs-chevron"${chevronStyle}>&#9654;</span>
                 <span class="cs-title">${t(this.titleKey)}</span>
                 <span class="cs-count">${count}</span>
+                ${this.headerExtra ? `<span class="cs-header-extra">${this.headerExtra}</span>` : ''}
                 <div class="cs-filter-wrap">
                     <input type="text" class="cs-filter" data-cs-filter="${this.sectionKey}"
                            placeholder="${t('section.filter.placeholder')}" autocomplete="off">
@@ -107,7 +110,7 @@ export class CardSection {
         if (!header || !content) return;
 
         header.addEventListener('mousedown', (e) => {
-            if (e.target.closest('.cs-filter-wrap')) return;
+            if (e.target.closest('.cs-filter-wrap') || e.target.closest('.cs-header-extra')) return;
             this._toggleCollapse(header, content);
         });
 
diff --git a/server/src/wled_controller/static/js/features/perf-charts.js b/server/src/wled_controller/static/js/features/perf-charts.js
index b5f6775..6044835 100644
--- a/server/src/wled_controller/static/js/features/perf-charts.js
+++ b/server/src/wled_controller/static/js/features/perf-charts.js
@@ -23,7 +23,16 @@ function _getColor(key) {
 }
 
 function _onChartColorChange(key, hex) {
-    localStorage.setItem(`perfChartColor_${key}`, hex);
+    if (hex) {
+        localStorage.setItem(`perfChartColor_${key}`, hex);
+    } else {
+        // Reset: remove saved color, fall back to default
+        localStorage.removeItem(`perfChartColor_${key}`);
+        hex = _getColor(key);
+        // Update swatch to show the actual default color
+        const swatch = document.getElementById(`cp-swatch-perf-${key}`);
+        if (swatch) swatch.style.background = hex;
+    }
     const chart = _charts[key];
     if (chart) {
         chart.data.datasets[0].borderColor = hex;
@@ -42,21 +51,21 @@ export function renderPerfSection() {
     return `<div class="perf-charts-grid">
         <div class="perf-chart-card">
             <div class="perf-chart-header">
-                <span class="perf-chart-label">${t('dashboard.perf.cpu')} ${createColorPicker({ id: 'perf-cpu', currentColor: _getColor('cpu'), anchor: 'left' })}</span>
+                <span class="perf-chart-label">${t('dashboard.perf.cpu')} ${createColorPicker({ id: 'perf-cpu', currentColor: _getColor('cpu'), anchor: 'left', showReset: true })}</span>
                 <span class="perf-chart-value" id="perf-cpu-value">-</span>
             </div>
             <div class="perf-chart-wrap"><span class="perf-chart-subtitle" id="perf-cpu-name"></span><canvas id="perf-chart-cpu"></canvas></div>
         </div>
         <div class="perf-chart-card">
             <div class="perf-chart-header">
-                <span class="perf-chart-label">${t('dashboard.perf.ram')} ${createColorPicker({ id: 'perf-ram', currentColor: _getColor('ram'), anchor: 'left' })}</span>
+                <span class="perf-chart-label">${t('dashboard.perf.ram')} ${createColorPicker({ id: 'perf-ram', currentColor: _getColor('ram'), anchor: 'left', showReset: true })}</span>
                 <span class="perf-chart-value" id="perf-ram-value">-</span>
             </div>
             <div class="perf-chart-wrap"><canvas id="perf-chart-ram"></canvas></div>
         </div>
         <div class="perf-chart-card" id="perf-gpu-card">
             <div class="perf-chart-header">
-                <span class="perf-chart-label">${t('dashboard.perf.gpu')} ${createColorPicker({ id: 'perf-gpu', currentColor: _getColor('gpu'), anchor: 'left' })}</span>
+                <span class="perf-chart-label">${t('dashboard.perf.gpu')} ${createColorPicker({ id: 'perf-gpu', currentColor: _getColor('gpu'), anchor: 'left', showReset: true })}</span>
                 <span class="perf-chart-value" id="perf-gpu-value">-</span>
             </div>
             <div class="perf-chart-wrap"><span class="perf-chart-subtitle" id="perf-gpu-name"></span><canvas id="perf-chart-gpu"></canvas></div>
diff --git a/server/src/wled_controller/static/js/features/targets.js b/server/src/wled_controller/static/js/features/targets.js
index c60aaca..801cf5d 100644
--- a/server/src/wled_controller/static/js/features/targets.js
+++ b/server/src/wled_controller/static/js/features/targets.js
@@ -33,8 +33,8 @@ import { updateSubTabHash, updateTabBadge } from './tabs.js';
 // ── Card section instances ──
 const csDevices = new CardSection('led-devices', { titleKey: 'targets.section.devices', gridClass: 'devices-grid', addCardOnclick: "showAddDevice()", keyAttr: 'data-device-id' });
 const csColorStrips = new CardSection('led-css', { titleKey: 'targets.section.color_strips', gridClass: 'devices-grid', addCardOnclick: "showCSSEditor()", keyAttr: 'data-css-id' });
-const csLedTargets = new CardSection('led-targets', { titleKey: 'targets.section.targets', gridClass: 'devices-grid', addCardOnclick: "showTargetEditor()", keyAttr: 'data-target-id' });
-const csKCTargets = new CardSection('kc-targets', { titleKey: 'targets.section.key_colors', gridClass: 'devices-grid', addCardOnclick: "showKCEditor()", keyAttr: 'data-kc-target-id' });
+const csLedTargets = new CardSection('led-targets', { titleKey: 'targets.section.targets', gridClass: 'devices-grid', addCardOnclick: "showTargetEditor()", keyAttr: 'data-target-id', headerExtra: `<button class="btn btn-sm btn-danger" onclick="event.stopPropagation(); stopAllLedTargets()" data-stop-all="led">${ICON_STOP}</button>` });
+const csKCTargets = new CardSection('kc-targets', { titleKey: 'targets.section.key_colors', gridClass: 'devices-grid', addCardOnclick: "showKCEditor()", keyAttr: 'data-kc-target-id', headerExtra: `<button class="btn btn-sm btn-danger" onclick="event.stopPropagation(); stopAllKCTargets()" data-stop-all="kc">${ICON_STOP}</button>` });
 const csPatternTemplates = new CardSection('kc-patterns', { titleKey: 'targets.section.pattern_templates', gridClass: 'templates-grid', addCardOnclick: "showPatternTemplateEditor()", keyAttr: 'data-pattern-template-id' });
 
 // Re-render targets tab when language changes (only if tab is active)
@@ -621,6 +621,14 @@ export async function loadTargetsTab() {
             CardSection.bindAll([csDevices, csColorStrips, csLedTargets, csKCTargets, csPatternTemplates]);
         }
 
+        // Show/hide stop-all buttons based on running state
+        const ledRunning = ledTargets.some(t => t.state && t.state.processing);
+        const kcRunning = kcTargets.some(t => t.state && t.state.processing);
+        const ledStopBtn = container.querySelector('[data-stop-all="led"]');
+        const kcStopBtn = container.querySelector('[data-stop-all="kc"]');
+        if (ledStopBtn) ledStopBtn.style.display = ledRunning ? '' : 'none';
+        if (kcStopBtn) kcStopBtn.style.display = kcRunning ? '' : 'none';
+
         // Patch volatile metrics in-place (avoids full card replacement on polls)
         for (const tgt of ledTargets) {
             if (tgt.state && tgt.state.processing) _patchTargetMetrics(tgt);
@@ -983,6 +991,40 @@ export async function stopTargetProcessing(targetId) {
     });
 }
 
+export async function stopAllLedTargets() {
+    await _stopAllByType('led');
+}
+
+export async function stopAllKCTargets() {
+    await _stopAllByType('key_colors');
+}
+
+async function _stopAllByType(targetType) {
+    try {
+        const [targetsResp, statesResp] = await Promise.all([
+            fetchWithAuth('/picture-targets'),
+            fetchWithAuth('/picture-targets/batch/states'),
+        ]);
+        const data = await targetsResp.json();
+        const statesData = statesResp.ok ? await statesResp.json() : { states: {} };
+        const states = statesData.states || {};
+        const typeMatch = targetType === 'led' ? t => t.target_type === 'led' || t.target_type === 'wled' : t => t.target_type === targetType;
+        const running = (data.targets || []).filter(t => typeMatch(t) && states[t.id]?.processing);
+        if (!running.length) {
+            showToast(t('targets.stop_all.none_running'), 'info');
+            return;
+        }
+        await Promise.all(running.map(t =>
+            fetchWithAuth(`/picture-targets/${t.id}/stop`, { method: 'POST' }).catch(() => {})
+        ));
+        showToast(t('targets.stop_all.stopped', { count: running.length }), 'success');
+        loadTargetsTab();
+    } catch (error) {
+        if (error.isAuth) return;
+        showToast(t('targets.stop_all.error'), 'error');
+    }
+}
+
 export async function startTargetOverlay(targetId) {
     await _targetAction(async () => {
         const response = await fetchWithAuth(`/picture-targets/${targetId}/overlay/start`, {
diff --git a/server/src/wled_controller/static/locales/en.json b/server/src/wled_controller/static/locales/en.json
index 8fbd09a..8c440dd 100644
--- a/server/src/wled_controller/static/locales/en.json
+++ b/server/src/wled_controller/static/locales/en.json
@@ -1093,6 +1093,9 @@
   "target.error.clone_failed": "Failed to clone target",
   "target.error.autostart_toggle_failed": "Failed to toggle auto-start",
   "target.error.delete_failed": "Failed to delete target",
+  "targets.stop_all.none_running": "No targets are currently running",
+  "targets.stop_all.stopped": "Stopped {count} target(s)",
+  "targets.stop_all.error": "Failed to stop targets",
   "audio_source.error.load": "Failed to load audio source",
   "audio_template.error.clone_failed": "Failed to clone audio template",
   "value_source.error.load": "Failed to load value source",
diff --git a/server/src/wled_controller/static/locales/ru.json b/server/src/wled_controller/static/locales/ru.json
index 548ae29..2905f3d 100644
--- a/server/src/wled_controller/static/locales/ru.json
+++ b/server/src/wled_controller/static/locales/ru.json
@@ -1093,6 +1093,9 @@
   "target.error.clone_failed": "Не удалось клонировать цель",
   "target.error.autostart_toggle_failed": "Не удалось переключить автозапуск",
   "target.error.delete_failed": "Не удалось удалить цель",
+  "targets.stop_all.none_running": "Нет запущенных целей",
+  "targets.stop_all.stopped": "Остановлено целей: {count}",
+  "targets.stop_all.error": "Не удалось остановить цели",
   "audio_source.error.load": "Не удалось загрузить аудиоисточник",
   "audio_template.error.clone_failed": "Не удалось клонировать аудиошаблон",
   "value_source.error.load": "Не удалось загрузить источник значений",
diff --git a/server/src/wled_controller/static/locales/zh.json b/server/src/wled_controller/static/locales/zh.json
index c1134ce..0c65100 100644
--- a/server/src/wled_controller/static/locales/zh.json
+++ b/server/src/wled_controller/static/locales/zh.json
@@ -1093,6 +1093,9 @@
   "target.error.clone_failed": "克隆目标失败",
   "target.error.autostart_toggle_failed": "切换自动启动失败",
   "target.error.delete_failed": "删除目标失败",
+  "targets.stop_all.none_running": "当前没有运行中的目标",
+  "targets.stop_all.stopped": "已停止 {count} 个目标",
+  "targets.stop_all.error": "停止目标失败",
   "audio_source.error.load": "加载音频源失败",
   "audio_template.error.clone_failed": "克隆音频模板失败",
   "value_source.error.load": "加载数值源失败",