feat: BindableFloat — universal value source binding for all scalar properties

Introduce BindableFloat abstraction that allows any numeric property to be
either a static value or dynamically driven by a ValueSource. Backward-compatible
serialization: plain float when unbound, {value, source_id} dict when bound.

Backend:
- storage/bindable.py — BindableFloat dataclass + bfloat() helper
- 25+ scalar properties converted across all entity types
- Runtime VS acquisition in ColorStripStreamManager for CSS bindings
- All stream hot loops use self.resolve() for live values
- KeyColorsColorStripStream now inherits ColorStripStream

Frontend:
- BindableScalarWidget (slider + VS picker toggle) for all editors
- TypeScript BindableFloat type + helpers
- Graph editor edges for all bindable properties
- Audio source channel IconSelect grid

Fixes: daylight longitude, candlelight wind_strength/candle_type from_dict

server/src/wled_controller/templates/modals/ha-light-editor.html

@@ -39,29 +39,25 @@
                 <!-- Update Rate -->
                 <div class="form-group">
                     <div class="label-row">
-                        <label for="ha-light-editor-update-rate">
+                        <label>
                             <span data-i18n="ha_light.update_rate">Update Rate:</span>
-                            <span id="ha-light-editor-update-rate-display">2.0</span> Hz
                         </label>
                         <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                     </div>
                     <small class="input-hint" style="display:none" data-i18n="ha_light.update_rate.hint">How often to send color updates to HA lights (0.5-5.0 Hz). Lower values are safer for HA performance.</small>
-                    <input type="range" id="ha-light-editor-update-rate" min="0.5" max="5.0" step="0.5" value="2.0"
-                        oninput="document.getElementById('ha-light-editor-update-rate-display').textContent = parseFloat(this.value).toFixed(1)">
+                    <div id="ha-light-editor-update-rate-container"></div>
                 </div>
 
                 <!-- Transition -->
                 <div class="form-group">
                     <div class="label-row">
-                        <label for="ha-light-editor-transition">
+                        <label>
                             <span data-i18n="ha_light.transition">Transition:</span>
-                            <span id="ha-light-editor-transition-display">0.5</span>s
                         </label>
                         <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                     </div>
                     <small class="input-hint" style="display:none" data-i18n="ha_light.transition.hint">Smooth fade duration between colors (HA transition parameter). Higher values give smoother but slower transitions.</small>
-                    <input type="range" id="ha-light-editor-transition" min="0" max="5.0" step="0.1" value="0.5"
-                        oninput="document.getElementById('ha-light-editor-transition-display').textContent = parseFloat(this.value).toFixed(1)">
+                    <div id="ha-light-editor-transition-container"></div>
                 </div>
 
                 <!-- Brightness Value Source -->
@@ -74,6 +70,30 @@
                     </select>
                 </div>
 
+                <!-- Color Tolerance -->
+                <div class="form-group">
+                    <div class="label-row">
+                        <label>
+                            <span data-i18n="ha_light.color_tolerance">Color Tolerance:</span>
+                        </label>
+                        <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
+                    </div>
+                    <small class="input-hint" style="display:none" data-i18n="ha_light.color_tolerance.hint">Skip sending color updates when the RGB delta is below this threshold. Reduces HA traffic for near-static scenes.</small>
+                    <div id="ha-light-editor-color-tolerance-container"></div>
+                </div>
+
+                <!-- Min Brightness Threshold -->
+                <div class="form-group">
+                    <div class="label-row">
+                        <label>
+                            <span data-i18n="ha_light.min_brightness_threshold">Min Brightness Threshold:</span>
+                        </label>
+                        <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
+                    </div>
+                    <small class="input-hint" style="display:none" data-i18n="ha_light.min_brightness_threshold.hint">Effective output brightness below this value turns lights off completely (0 = disabled)</small>
+                    <div id="ha-light-editor-min-brightness-threshold-container"></div>
+                </div>
+
                 <!-- Light Mappings -->
                 <div class="form-group">
                     <div class="label-row">