Fix nonlocal scoping in CSS processing, move brightness source emoji to dropdown items

Add nonlocal declarations for _u16_a, _u16_b, _i32 in nested functions
_blend_u16 and _apply_corrections — Python treats augmented assignments
(*=, +=, >>=) as local variable bindings, causing UnboundLocalError
that prevented any frames from being sent to devices.

Move 🔢 emoji from brightness source label to dropdown option items.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/core/processing/color_strip_stream.py

@@ -305,6 +305,7 @@ class PictureColorStripStream(ColorStripStream):
 
             Uses pre-allocated uint16 scratch buffers (_u16_a, _u16_b).
             """
+            nonlocal _u16_a, _u16_b
             np.copyto(_u16_a, a, casting='unsafe')
             np.copyto(_u16_b, b, casting='unsafe')
             _u16_a *= (256 - alpha_b)
@@ -318,6 +319,7 @@ class PictureColorStripStream(ColorStripStream):
 
             Returns the (possibly reassigned) led_colors array.
             """
+            nonlocal _i32
             if self._saturation != 1.0:
                 _apply_saturation(led_colors, self._saturation, _i32, _i32_gray, led_colors)
             if self._gamma != 1.0:

server/src/wled_controller/static/js/features/kc-targets.js

@@ -363,11 +363,9 @@ function _populateKCBrightnessVsDropdown(selectedId = '') {
     // Keep the first "None" option, remove the rest
     while (sel.options.length > 1) sel.remove(1);
     _cachedValueSources.forEach(vs => {
-        const typeIcons = { static: '📊', animated: '🔄', audio: '🎵' };
-        const icon = typeIcons[vs.source_type] || '🔢';
         const opt = document.createElement('option');
         opt.value = vs.id;
-        opt.textContent = `${icon} ${vs.name}`;
+        opt.textContent = `🔢 ${vs.name}`;
         sel.appendChild(opt);
     });
     sel.value = selectedId || '';

server/src/wled_controller/static/js/features/targets.js

@@ -184,9 +184,7 @@ function _populateBrightnessVsDropdown(selectedId = '') {
     const select = document.getElementById('target-editor-brightness-vs');
     let html = `<option value="">${t('targets.brightness_vs.none')}</option>`;
     _cachedValueSources.forEach(vs => {
-        const typeIcons = { static: '📊', animated: '🔄', audio: '🎵' };
+        html += `<option value="${vs.id}"${vs.id === selectedId ? ' selected' : ''}>🔢 ${escapeHtml(vs.name)}</option>`;
-        const icon = typeIcons[vs.source_type] || '🎚️';
-        html += `<option value="${vs.id}"${vs.id === selectedId ? ' selected' : ''}>${icon} ${escapeHtml(vs.name)}</option>`;
     });
     select.innerHTML = html;
 }

server/src/wled_controller/static/locales/en.json

@@ -431,7 +431,7 @@
   "kc.pattern_template": "Pattern Template:",
   "kc.pattern_template.hint": "Select the rectangle pattern to use for color extraction",
   "kc.pattern_template.none": "-- Select a pattern template --",
-  "kc.brightness_vs": "🔢 Brightness Source:",
+  "kc.brightness_vs": "Brightness Source:",
   "kc.brightness_vs.hint": "Optional value source that dynamically controls brightness each frame (multiplied with the manual brightness slider)",
   "kc.brightness_vs.none": "None (manual brightness only)",
   "kc.created": "Key colors target created successfully",
@@ -847,7 +847,7 @@
   "value_source.deleted": "Value source deleted",
   "value_source.delete.confirm": "Are you sure you want to delete this value source?",
   "value_source.error.name_required": "Please enter a name",
-  "targets.brightness_vs": "🔢 Brightness Source:",
+  "targets.brightness_vs": "Brightness Source:",
   "targets.brightness_vs.hint": "Optional value source that dynamically controls brightness each frame (overrides device brightness)",
   "targets.brightness_vs.none": "None (device brightness)"
 }

server/src/wled_controller/static/locales/ru.json

@@ -431,7 +431,7 @@
   "kc.pattern_template": "Шаблон Паттерна:",
   "kc.pattern_template.hint": "Выберите шаблон прямоугольников для извлечения цветов",
   "kc.pattern_template.none": "-- Выберите шаблон паттерна --",
-  "kc.brightness_vs": "🔢 Источник Яркости:",
+  "kc.brightness_vs": "Источник Яркости:",
   "kc.brightness_vs.hint": "Опциональный источник значений, динамически управляющий яркостью каждый кадр (умножается на ручной слайдер яркости)",
   "kc.brightness_vs.none": "Нет (только ручная яркость)",
   "kc.created": "Цель ключевых цветов успешно создана",
@@ -847,7 +847,7 @@
   "value_source.deleted": "Источник значений удалён",
   "value_source.delete.confirm": "Удалить этот источник значений?",
   "value_source.error.name_required": "Введите название",
-  "targets.brightness_vs": "🔢 Источник яркости:",
+  "targets.brightness_vs": "Источник яркости:",
   "targets.brightness_vs.hint": "Необязательный источник значений для динамического управления яркостью каждый кадр (переопределяет яркость устройства)",
   "targets.brightness_vs.none": "Нет (яркость устройства)"
 }