Add visual selectors to automation and KC target editors

Automation editor:
- IconSelect grid for condition logic (OR/AND) with descriptions

KC target editor:
- IconSelect for color mode (average/median/dominant) with SVG previews
- EntitySelect palette for picture source, pattern template, brightness source

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

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

@@ -524,6 +524,9 @@
   "kc.interpolation.average": "Average",
   "kc.interpolation.median": "Median",
   "kc.interpolation.dominant": "Dominant",
+  "kc.interpolation.average.desc": "Mean of all pixel colors",
+  "kc.interpolation.median.desc": "Middle color value per channel",
+  "kc.interpolation.dominant.desc": "Most frequent color",
   "kc.smoothing": "Smoothing:",
   "kc.smoothing.hint": "Temporal blending between extractions (0=none, 1=full)",
   "kc.pattern_template": "Pattern Template:",
@@ -614,6 +617,8 @@
   "automations.condition_logic.hint": "How multiple conditions are combined: ANY (OR) or ALL (AND)",
   "automations.condition_logic.or": "Any condition (OR)",
   "automations.condition_logic.and": "All conditions (AND)",
+  "automations.condition_logic.or.desc": "Triggers when any condition matches",
+  "automations.condition_logic.and.desc": "Triggers only when all match",
   "automations.conditions": "Conditions:",
   "automations.conditions.hint": "Rules that determine when this automation activates",
   "automations.conditions.add": "Add Condition",