feat(ui): auto-detect HIGH/LOW badges and auto-tag filters (#918)

- Backend auto-tag extraction service: detect HIGH/LOW (Wan-only), I2V/T2V/TI2V,
  Lightning/Turbo from filename, base_model, and CivitAI version name
- HIGH/LOW badge in card footer (inline before version name), color-coded:
  blue for HIGH, teal for LOW; abbreviated to H/L in medium/compact density
- Auto-tag filter panel (I2V, T2V, TI2V, Lightning, Turbo) with tri-state
  include/exclude filtering
- Full filter pipeline: FilterCriteria → ModelFilterSet → baseModelApi params
- AUTO_TAG_GROUPS exported for frontend use
- 19 unit tests for auto-tag extraction edge cases

static/js/utils/constants.js

@@ -500,6 +500,18 @@ export function clearDynamicBaseModels() {
     dynamicBaseModelsTimestamp = null;
 }
 
+export const AUTO_TAG_GROUPS = {
+    mode: new Set(['HIGH', 'LOW']),
+    video: new Set(['I2V', 'T2V', 'TI2V']),
+    speed: new Set(['Lightning', 'Turbo']),
+};
+
+export const AUTO_TAG_GROUP_LABELS = {
+    mode: 'High / Low',
+    video: 'I2V / T2V / TI2V',
+    speed: 'Lightning / Turbo',
+};
+
 /**
  * Check if dynamic base models cache is valid
  * @returns {boolean}