fix: keep Rating + Tags pills in their sections, only hide Flag in Discarded

Rated and Tags sections still benefit from their respective pill —
Rating because the user can refine the section's ratingMin >= 1 to a
higher floor, Tags because they can intersect the tag-grouped view
with a specific tag id list. Flag in Discarded is the only pill where
the section locks the only useful value, so it stays hidden there.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/filter/FilterBar.tsx

@@ -47,14 +47,12 @@ export function FilterBar() {
   const tagIds = useFilterStore((s) => s.tagIds)
   const currentSection = useFilterStore((s) => s.currentSection)
 
-  // Section-locked pills: each section has a preset filter that defines
-  // it (Rated → ratingMin, Discarded → flag, Tags → groupBy=tag). The
-  // matching pill is hidden while you're inside that section because
-  // toggling it would either be a no-op or break the section. The user
-  // can still navigate away to change the locked dimension.
-  const hideRatingPill = currentSection === 'rated'
+  // Only the Flag pill is hidden inside the Discarded section. Flag has
+  // exactly two values and the section locks one of them, so the pill
+  // would only ever toggle the section off — useless. Rating + Tags
+  // pills stay visible in their sections because the user can refine
+  // them further (ratingMin >= 3, restrict to specific tag ids).
   const hideFlagPill = currentSection === 'discarded'
-  const hideTagsPill = currentSection === 'tags'
 
   const setDateFrom = useFilterStore((s) => s.setDateFrom)
   const setDateTo = useFilterStore((s) => s.setDateTo)
@@ -226,10 +224,7 @@ export function FilterBar() {
         </div>
       </FilterPill>
 
-      {/* Rating — hidden in the Rated section since the section already
-       *  pins ratingMin and the only useful tweak (ratingMin >= N) lives
-       *  in the section preset itself. */}
-      {!hideRatingPill && (
+      {/* Rating */}
       <FilterPill
         label="Rating"
         value={ratingValue}
@@ -259,7 +254,6 @@ export function FilterBar() {
           </div>
         </div>
       </FilterPill>
-      )}
 
       {/* Color */}
       <FilterPill
@@ -332,10 +326,8 @@ export function FilterBar() {
         </FilterPill>
       )}
 
-      {/* Tags — hidden in the Tags section since the section already
-       *  groups everything by tag and re-applying a tag filter on top
-       *  collapses the view to a single bucket. */}
-      {!hideTagsPill && allTags.length > 0 && (
+      {/* Tags */}
+      {allTags.length > 0 && (
         <FilterPill
           label="Tags"
           value={tagValue}