feat: colors view and color label thumbnail ornament

Adds a Colors entry under Views that buckets photos in canonical
R-O-Y-G-B-P order (plus an Uncolored tail), mirroring the rated/tags
grouping pattern. Surfaces the color label on each thumbnail as a
small swatch chip preceding the rating badge in the BL corner so
labels are visible everywhere, not just inside the new view. Also
types color_label on the Photo interface — the backend already
returned it.

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

frontend/src/components/layout/LeftSidebar.tsx

@@ -10,6 +10,7 @@ import {
   HardDrive,
   Copy,
   Tag as TagIcon,
+  Palette,
   Layers2,
   MoreHorizontal,
   Pencil,
@@ -244,6 +245,9 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
       case 'tags':
         navigateToSection('tags', { groupBy: 'tag' })
         break
+      case 'colors':
+        navigateToSection('colors', { groupBy: 'color' })
+        break
       default:
         if (id.startsWith('folder-')) {
           const folderId = id.slice('folder-'.length)
@@ -344,6 +348,7 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
         { id: 'all-photos', label: 'All Photos', icon: <Image className="h-4 w-4" />, count: stats?.all_photos ?? 0 },
         { id: 'rated', label: 'Rated', icon: <Star className="h-4 w-4" />, count: stats?.rated ?? 0 },
         { id: 'tags', label: 'Tags', icon: <TagIcon className="h-4 w-4" />, count: tagsTotalCount },
+        { id: 'colors', label: 'Colors', icon: <Palette className="h-4 w-4" /> },
         { id: 'duplicates', label: 'Duplicates', icon: <Copy className="h-4 w-4" />, count: stats?.duplicates ?? 0 },
         { id: 'discarded', label: 'Discarded', icon: <Trash2 className="h-4 w-4" />, count: stats?.discarded ?? 0 },
       ],

frontend/src/components/timeline/PhotoThumbnail.tsx

@@ -4,6 +4,7 @@ import clsx from 'clsx'
 import { photos as photosApi } from '../../services/api'
 import type { Photo } from '../../types/photo'
 import { usePhotoStore } from '../../store/photoStore'
+import { COLOR_LABEL_OPTIONS } from '../../constants/colorLabels'
 
 /** Custom MIME used by HeapsPanel to recognise our drag payload. */
 export const PHOTO_DRAG_MIME = 'application/x-mulita-photos'
@@ -28,12 +29,21 @@ export const THUMB_BADGE_BASE =
 export const THUMB_BADGE_SQUARE = 'w-5 justify-center !px-0'
 /** Standard icon size for any lucide glyph inside a badge. */
 export const THUMB_BADGE_ICON = 'h-3 w-3'
-export const THUMB_BADGE_PRIMARY =
-  'bg-primary shadow-[0_0_0_1px_rgba(0,0,0,0.55),inset_0_1px_0_rgba(255,255,255,0.28),0_1px_2px_rgba(0,0,0,0.5)]'
+/** Chiseled-pixel frame: 1px outline + inset top highlight + drop shadow.
+ *  Shared by every "user-affirmed" variant so any swatch (primary, pick,
+ *  color label) reads as part of the same badge family. */
+const THUMB_BADGE_FRAME =
+  'shadow-[0_0_0_1px_rgba(0,0,0,0.55),inset_0_1px_0_rgba(255,255,255,0.28),0_1px_2px_rgba(0,0,0,0.5)]'
+export const THUMB_BADGE_PRIMARY = `bg-primary ${THUMB_BADGE_FRAME}`
 export const THUMB_BADGE_NEUTRAL =
   'bg-black/75 backdrop-blur-sm shadow-[0_0_0_1px_rgba(255,255,255,0.12),inset_0_1px_0_rgba(255,255,255,0.08),0_1px_2px_rgba(0,0,0,0.55)]'
-export const THUMB_BADGE_PICK =
-  'bg-pick shadow-[0_0_0_1px_rgba(0,0,0,0.55),inset_0_1px_0_rgba(255,255,255,0.28),0_1px_2px_rgba(0,0,0,0.5)]'
+export const THUMB_BADGE_PICK = `bg-pick ${THUMB_BADGE_FRAME}`
+
+/** Tailwind bg-class for each color label, looked up at render time so the
+ *  classnames are statically present in the source for the JIT to scan. */
+const COLOR_LABEL_BG: Record<string, string> = Object.fromEntries(
+  COLOR_LABEL_OPTIONS.map((o) => [o.value, o.className])
+)
 
 // Auto-retry schedule (ms). Backend generates thumbs on-demand via Celery, so
 // the first hit on a freshly-scanned library returns 404 "not ready" until
@@ -254,18 +264,30 @@ export function PhotoThumbnail({
         </div>
       )}
 
-      {/* BL — rating */}
-      {photo.rating > 0 && (
-        <div
-          className={clsx(
-            'absolute bottom-1 left-1 gap-0.5',
-            THUMB_BADGE_BASE,
-            THUMB_BADGE_PRIMARY
+      {/* BL — color label + rating. Color comes first (left of rating)
+       *  so the swatch reads as a "category dot" prefixing the stars. */}
+      {(photo.color_label || photo.rating > 0) && (
+        <div className="absolute bottom-1 left-1 flex items-center gap-1">
+          {photo.color_label && COLOR_LABEL_BG[photo.color_label] && (
+            <div
+              className={clsx(
+                THUMB_BADGE_BASE,
+                THUMB_BADGE_SQUARE,
+                COLOR_LABEL_BG[photo.color_label],
+                THUMB_BADGE_FRAME
+              )}
+              title={`Color label: ${photo.color_label}`}
+            />
+          )}
+          {photo.rating > 0 && (
+            <div
+              className={clsx('gap-0.5', THUMB_BADGE_BASE, THUMB_BADGE_PRIMARY)}
+            >
+              {Array.from({ length: photo.rating }).map((_, i) => (
+                <Star key={i} className={clsx(THUMB_BADGE_ICON, 'fill-white')} />
+              ))}
+            </div>
           )}
-        >
-          {Array.from({ length: photo.rating }).map((_, i) => (
-            <Star key={i} className={clsx(THUMB_BADGE_ICON, 'fill-white')} />
-          ))}
         </div>
       )}
 

frontend/src/components/timeline/Timeline.tsx

@@ -6,6 +6,7 @@ import { useFilterStore } from '../../store/filterStore'
 import { PhotoThumbnail } from './PhotoThumbnail'
 import { usePhotosQuery } from '../../hooks/usePhotosQuery'
 import { useActiveHeapMembers } from '../../hooks/useActiveHeapMembersQuery'
+import { COLOR_LABEL_OPTIONS } from '../../constants/colorLabels'
 import type { Photo } from '../../types/photo'
 
 // Layout constants for the grid + grouped headers.
@@ -26,11 +27,13 @@ type TimelineItem =
 /**
  * Build the flat header|row item array the virtualizer renders.
  *
- * Four modes:
+ * Five modes:
  *  - groupBy='tag': one bucket per unique tag (plus an "Untagged" bucket
  *    for photos with no tags). A photo with N tags appears in N buckets.
  *  - groupBy='rating': one bucket per star rating 5..1 (plus "Unrated"
  *    for rating 0). Each photo lands in exactly one bucket.
+ *  - groupBy='color': one bucket per color label, in canonical order
+ *    (plus an "Uncolored" bucket for photos with no label).
  *  - groupBy='date' AND sortBy is a date field: month buckets (existing).
  *  - otherwise: one un-headered stream.
  */
@@ -39,7 +42,7 @@ function buildItems(
   columns: number,
   rowHeight: number,
   sortBy: string,
-  groupBy: 'date' | 'tag' | 'rating'
+  groupBy: 'date' | 'tag' | 'rating' | 'color'
 ): TimelineItem[] {
   if (photos.length === 0) return []
 
@@ -154,6 +157,55 @@ function buildItems(
     return items
   }
 
+  // ── Color label grouping ──────────────────────────────────────────────
+  if (groupBy === 'color') {
+    // Bucket by color_label. Each photo lands in exactly one bucket;
+    // photos with no label go into "Uncolored".
+    const colorBuckets = new Map<string, PhotoCell[]>()
+    const uncolored: PhotoCell[] = []
+
+    photos.forEach((photo, globalIndex) => {
+      const cell: PhotoCell = { photo, globalIndex }
+      const label = photo.color_label
+      if (label) {
+        const arr = colorBuckets.get(label) ?? []
+        arr.push(cell)
+        colorBuckets.set(label, arr)
+      } else {
+        uncolored.push(cell)
+      }
+    })
+
+    // Walk the canonical color order so headers always read R-O-Y-G-B-P,
+    // matching every other color UI in the app. Skip empty buckets and
+    // ignore any unexpected label values that aren't in the canonical
+    // list (they'd be invalid backend state).
+    let bucketIndex = 0
+    for (const { value } of COLOR_LABEL_OPTIONS) {
+      const cells = colorBuckets.get(value)
+      if (!cells || cells.length === 0) continue
+      const label = value.charAt(0).toUpperCase() + value.slice(1)
+      items.push({
+        type: 'header',
+        key: `color::${bucketIndex}::${value}`,
+        label,
+        height: HEADER_HEIGHT,
+      })
+      pushRowsForGroup(`color::${bucketIndex}::${value}`, cells)
+      bucketIndex++
+    }
+    if (uncolored.length > 0) {
+      items.push({
+        type: 'header',
+        key: `color::${bucketIndex}::__uncolored`,
+        label: 'Uncolored',
+        height: HEADER_HEIGHT,
+      })
+      pushRowsForGroup(`color::${bucketIndex}::uncolored`, uncolored)
+    }
+    return items
+  }
+
   // ── Date grouping (existing) ──────────────────────────────────────────
   const isDateSort = sortBy === 'taken_at' || sortBy === 'added_at'
 

frontend/src/store/filterStore.ts

@@ -11,7 +11,7 @@ export type SortField =
   | 'file_size'
   | 'rating'
 export type SortOrder = 'asc' | 'desc'
-export type GroupBy = 'date' | 'tag' | 'rating'
+export type GroupBy = 'date' | 'tag' | 'rating' | 'color'
 
 export interface FilterState {
   q: string

frontend/src/types/photo.ts

@@ -13,6 +13,7 @@ export interface Photo {
   height: number | null
   taken_at: string | null
   rating: number
+  color_label?: string | null
   is_discarded: boolean
   is_duplicate: boolean
   file_hash: string