block-filters: hide labitbu chip outside mint window; default OTS on

- Labitbu gate now hides the chip on every view that isn't a block
  inside the historical mint window. Mempool / cluster / Next Block
  views (blockHeight = null) previously kept the chip visible; no new
  labitbu tx will ever land in the mempool so the chip is pure noise
  there. Flipped from "show if null OR in-window" to "show only if
  explicitly in-window".

- OpenTimestamps chip is now selected by default. ordpool_ots was
  the only Ordpool Flag missing from activeGoggles$.filters; users
  shouldn't have to opt in to see OTS commits on the block-overview
  graph out of the box.

- Re-sync filters on disabledFilters change. The activeGoggles$
  subscription runs once in ngOnInit before [blockHeight] flows in,
  so any filter that started disabled (labitbu by default, since
  blockHeight starts null) was pruned from activeFilters and never
  came back when the gate later opened. Extracted the subscribe-body
  into applyActiveGoggles() and call it again whenever
  excludeFilters / blockHeight change.

Author: hans-crypto

frontend/src/app/components/block-filters/block-filters.component.ts

@@ -43,16 +43,7 @@ export class BlockFiltersComponent implements OnInit, OnChanges, OnDestroy {
 
   ngOnInit(): void {
     this.filterSubscription = this.stateService.activeGoggles$.subscribe((active: ActiveFilter) => {
-      this.filterMode = active.mode;
-      this.gradientMode = active.gradient;
-      for (const key of Object.keys(this.filterFlags)) {
-        this.filterFlags[key] = false;
-      }
-      for (const key of active.filters) {
-        this.filterFlags[key] = !this.disabledFilters[key];
-      }
-      this.activeFilters = [...active.filters.filter(key => !this.disabledFilters[key])];
-      this.onFilterChanged.emit({ mode: active.mode, filters: this.activeFilters, gradient: this.gradientMode });
+      this.applyActiveGoggles(active);
     });
   }
 
@@ -66,13 +57,35 @@ export class BlockFiltersComponent implements OnInit, OnChanges, OnDestroy {
         this.disabledFilters[filter] = true;
       });
       // HACK -- Ordpool: gate labitbu chip on the labitbu mint window.
-      // Show on mempool / cluster views (blockHeight = null) and on blocks
-      // inside the window. Hide everywhere else: the labitbu experiment is
-      // done and the chip is meaningless on every other block.
-      if (this.blockHeight != null && (this.blockHeight < LABITBU_FIRST_HEIGHT || this.blockHeight > LABITBU_LAST_HEIGHT)) {
+      // The labitbu experiment is done; minting is complete. Show the chip
+      // ONLY on blocks inside the historical mint window. Hide everywhere
+      // else, including mempool / cluster / Next Block views (blockHeight
+      // null) — no new labitbu tx will ever land in the mempool, so the
+      // chip is pure noise there.
+      if (this.blockHeight == null || this.blockHeight < LABITBU_FIRST_HEIGHT || this.blockHeight > LABITBU_LAST_HEIGHT) {
         this.disabledFilters['ordpool_labitbu'] = true;
       }
+      // HACK -- Ordpool: re-sync active filters whenever `disabledFilters`
+      // changes. Without this, a filter that started disabled (e.g. labitbu
+      // when the component mounted before `blockHeight` flowed in) stays
+      // pruned from `activeFilters` even after the gate later opens.
+      if (this.filterSubscription) {
+        this.applyActiveGoggles(this.stateService.activeGoggles$.value);
+      }
+    }
+  }
+
+  private applyActiveGoggles(active: ActiveFilter): void {
+    this.filterMode = active.mode;
+    this.gradientMode = active.gradient;
+    for (const key of Object.keys(this.filterFlags)) {
+      this.filterFlags[key] = false;
+    }
+    for (const key of active.filters) {
+      this.filterFlags[key] = !this.disabledFilters[key];
     }
+    this.activeFilters = [...active.filters.filter(key => !this.disabledFilters[key])];
+    this.onFilterChanged.emit({ mode: active.mode, filters: this.activeFilters, gradient: this.gradientMode });
   }
 
   setFilterMode(mode): void {

frontend/src/app/services/state.service.ts

@@ -247,6 +247,7 @@ export class StateService {
       'ordpool_stamp',
       'ordpool_src721',
       'ordpool_src101',
+      'ordpool_ots',
     ],
     gradient: 'fee'
   });