feat(filters+ui): per-element author/publisher filters, playlist toggles, Up Next API, reorder UI, dashboard badges

Phases 4 + 5 of the metadata overhaul (plan §4, §5) plus §3 handler
wiring.

Filters (§4.1): author_filter/publisher_filter now match per-element
against the authors[]/publishers[] arrays — a co-authored book matches
any one of its authors — with comma-joined params acting as
OR-within-facet multi-select (string_to_array + cross unnest). Legacy
single-value params unchanged on the wire; series/genre/language
filters stay on their varchar columns; narrator filter already
per-element.

Collections API (§3.3-3.5): collection detail carries viewer +
hide_finished into the listing query and exposes up_next (visible-
library-enforced reading-queue head); PUT
/api/collections/:id/items/order (owner-only, full-order rewrite);
UpdateCollectionRequest gains hide_finished/show_up_next ([]
string last-value-wins for the hidden-false-sibling checkbox pattern)
merged server-side OVER stored view_settings so imported_from_series
provenance survives edits; EditCollectionModal renders the toggles
from view_settings.

Dashboard (§5.5): sections JSON carries is_playlist/complete
(dashboard.ts is the AGENTS-documented JSON-render exception; first
paint stays templ). Fully-read playlists render '✓ Playlist complete'
instead of an empty rail; imported playlists get a 📖 Playlist badge.

Frontend: book detail shows subtitle + full authors + Explicit badge;
edit modal gains subtitle, comma-separated authors/publishers (client-
split to arrays exactly like narrators), step=any series number,
explicit checkbox; collection book cards get playlist move ↑/↓ buttons
persisting the full order via the reorder endpoint (templ partial
re-render on failure — DOM order is client-local, API order is truth).

AGENTS.md gotcha #3 amended per plan §3.7: user collections are
dashboard sections by default; the show_on_dashboard premise is
retired.

Verified: full affected integration sweep green (pins widened for
up_next/is_playlist/complete — changelog entries in
docs/contract_pins.md); unit suite green; go build + templ + vite
green.

AGENTS.md

@@ -161,14 +161,19 @@ of a server bug: stop and flag the user.
    the cache stale until the next API-path write — never "preview"
    rule changes via psql and expect them applied (2026-10-14: a live
    curl test flip looked ignored until the API path was used).
-3. **User collections are not dashboard sections**: nothing sets
-   collection show_on_dashboard for user rows, and GetDashboardSections
-   skips empty user sections. Collection detail (JSON + SSR) must NOT
-   route user rows through the dashboard-section path — a 7ce7321
-   regression did exactly that (static detail without library_id
-   returned zero books until 0a7fbd6). Only real system query types
-   (continue-reading etc.) route there; `query_type='filter'` is the
-   schema DEFAULT on every user row, not a query type.
+3. **User collections are not dashboard query types** (amended 2026-10-19,
+   A2c): user collections ARE dashboard sections by default now —
+   GetUserCollectionsForDashboard no longer gates on show_on_dashboard
+   (which remains system-section provisioning state; hiding is
+   dashboard-prefs `hidden_collections` territory). GetDashboardSections
+   still skips genuinely empty user sections, but hide_finished
+   collections emit a Complete section instead of vanishing. Collection
+   detail (JSON + SSR) must still NOT route user rows through the
+   dashboard-section path — a 7ce7321 regression did exactly that
+   (static detail without library_id returned zero books until 0a7fbd6).
+   Only real system query types (continue-reading etc.) route there;
+   `query_type='filter'` is the schema DEFAULT on every user row, not a
+   query type.
 4. **End-of-day arithmetic**: anchor the END bound to the START of the
    day, never to NOW(). `now.AddDate(0,0,1) − 1ns` carries this
    instant's clock time into tomorrow — a range "ending today"

internal/database/queries.sql.go

@@ -13218,14 +13218,26 @@ WHERE COALESCE(lv.is_visible, true) = true
   AND mi.missing_scan_count = 0
   AND ($2::uuid IS NULL
   OR mi.library_id = $2::uuid)
-  -- Fuzzy author filter
-  AND ($3 = '' OR word_similarity($3, COALESCE(mi.author, '')) > 0.3)
+  -- Fuzzy author filter — per-element against the authors[] array (A2c
+  -- §4.1): a co-authored book matches ANY one of its authors, and a
+  -- comma-joined param is multi-select (OR within the facet).
+  AND ($3 = '' OR EXISTS (
+    SELECT 1
+    FROM unnest(string_to_array($3, ',')) AS f
+    JOIN unnest(mi.authors) AS a ON true
+    WHERE word_similarity(f, COALESCE(a, '')) > 0.3
+  ))
   -- Fuzzy series filter
   AND ($4 = '' OR word_similarity($4, COALESCE(mi.series, '')) > 0.3)
   -- Fuzzy genre filter
   AND ($5 = '' OR word_similarity($5, COALESCE(mi.genre, '')) > 0.3)
-  -- Fuzzy publisher filter
-  AND ($6 = '' OR word_similarity($6, COALESCE(mi.publisher, '')) > 0.3)
+  -- Fuzzy publisher filter — per-element against publishers[] (A2c §4.1).
+  AND ($6 = '' OR EXISTS (
+    SELECT 1
+    FROM unnest(string_to_array($6, ',')) AS f
+    JOIN unnest(mi.publishers) AS p ON true
+    WHERE word_similarity(f, COALESCE(p, '')) > 0.3
+  ))
   -- Fuzzy language filter
   AND ($7 = '' OR word_similarity($7, COALESCE(mi.language, '')) > 0.3)
   -- Tags filter (NEW - fuzzy match against tags array)

internal/database/queries/queries.sql

@@ -679,14 +679,26 @@ WHERE COALESCE(lv.is_visible, true) = true
   AND mi.missing_scan_count = 0
   AND (sqlc.narg('library_id')::uuid IS NULL
   OR mi.library_id = sqlc.narg('library_id')::uuid)
-  -- Fuzzy author filter
-  AND (sqlc.narg('author_filter') = '' OR word_similarity(sqlc.narg('author_filter'), COALESCE(mi.author, '')) > 0.3)
+  -- Fuzzy author filter — per-element against the authors[] array (A2c
+  -- §4.1): a co-authored book matches ANY one of its authors, and a
+  -- comma-joined param is multi-select (OR within the facet).
+  AND (sqlc.narg('author_filter') = '' OR EXISTS (
+    SELECT 1
+    FROM unnest(string_to_array(sqlc.narg('author_filter'), ',')) AS f
+    JOIN unnest(mi.authors) AS a ON true
+    WHERE word_similarity(f, COALESCE(a, '')) > 0.3
+  ))
   -- Fuzzy series filter
   AND (sqlc.narg('series_filter') = '' OR word_similarity(sqlc.narg('series_filter'), COALESCE(mi.series, '')) > 0.3)
   -- Fuzzy genre filter
   AND (sqlc.narg('genre_filter') = '' OR word_similarity(sqlc.narg('genre_filter'), COALESCE(mi.genre, '')) > 0.3)
-  -- Fuzzy publisher filter
-  AND (sqlc.narg('publisher_filter') = '' OR word_similarity(sqlc.narg('publisher_filter'), COALESCE(mi.publisher, '')) > 0.3)
+  -- Fuzzy publisher filter — per-element against publishers[] (A2c §4.1).
+  AND (sqlc.narg('publisher_filter') = '' OR EXISTS (
+    SELECT 1
+    FROM unnest(string_to_array(sqlc.narg('publisher_filter'), ',')) AS f
+    JOIN unnest(mi.publishers) AS p ON true
+    WHERE word_similarity(f, COALESCE(p, '')) > 0.3
+  ))
   -- Fuzzy language filter
   AND (sqlc.narg('language_filter') = '' OR word_similarity(sqlc.narg('language_filter'), COALESCE(mi.language, '')) > 0.3)
   -- Tags filter (NEW - fuzzy match against tags array)

internal/handlers/collections.go

@@ -52,6 +52,12 @@ type UpdateCollectionRequest struct {
 	Icon            string                 `form:"icon" json:"icon"`
 	AutoAssignRules []services.Rule        `form:"auto_assign_rules" json:"auto_assign_rules"`
 	ViewSettings    map[string]interface{} `form:"view_settings" json:"view_settings"`
+	// A2c §3.3: playlist toggles — merged into view_settings server-side
+	// (nil = untouched). []string because the form posts a hidden "false"
+	// sibling next to the checkbox; the LAST value wins. JSON clients may
+	// send a single-element array (or omit — untouched).
+	HideFinished []string `form:"hide_finished" json:"hide_finished"`
+	ShowUpNext   []string `form:"show_up_next" json:"show_up_next"`
 }
 
 type AddBooksRequest struct {
@@ -404,6 +410,23 @@ func (h *CollectionHandler) UpdateCollection(c *echo.Context) error {
 		return c.JSON(http.StatusBadRequest, map[string]string{"error": err.Error()})
 	}
 
+	// A2c §3.3: playlist toggles ride the edit form as top-level fields and
+	// merge into view_settings server-side (the form can't bind a map).
+	// The form posts a hidden "false" sibling before the checkbox, so the
+	// LAST value is the checkbox state.
+	if v := optionalFlag(req.HideFinished); v != nil {
+		if req.ViewSettings == nil {
+			req.ViewSettings = map[string]interface{}{}
+		}
+		req.ViewSettings["hide_finished"] = *v
+	}
+	if v := optionalFlag(req.ShowUpNext); v != nil {
+		if req.ViewSettings == nil {
+			req.ViewSettings = map[string]interface{}{}
+		}
+		req.ViewSettings["show_up_next"] = *v
+	}
+
 	collection, err := h.collectionService.UpdateCollection(
 		c.Request().Context(),
 		collectionID,
@@ -1336,3 +1359,13 @@ func (h *CollectionHandler) ReorderItems(c *echo.Context) error {
 	}
 	return c.JSON(http.StatusOK, map[string]string{"status": "reordered"})
 }
+
+// optionalFlag interprets a multi-valued form flag: last value wins
+// (hidden-false sibling precedes the checkbox), absent → nil (untouched).
+func optionalFlag(values []string) *bool {
+	if len(values) == 0 {
+		return nil
+	}
+	v := strings.EqualFold(values[len(values)-1], "true")
+	return &v
+}

internal/router/frontend.go

@@ -605,6 +605,19 @@ func registerFrontendRoutes(cfg *Config) {
 			Icon:        utils.PgTextString(collection.Icon),
 		}
 
+		// A2c §3.3: playlist toggles from view_settings.
+		if len(collection.ViewSettings) > 0 {
+			var vs map[string]interface{}
+			if json.Unmarshal(collection.ViewSettings, &vs) == nil {
+				if b, ok := vs["hide_finished"].(bool); ok {
+					colData.HideFinished = b
+				}
+				if b, ok := vs["show_up_next"].(bool); ok {
+					colData.ShowUpNext = b
+				}
+			}
+		}
+
 		// Ensure default color if empty
 		if colData.Color == "" {
 			colData.Color = "blue"

internal/services/collection_service.go

@@ -155,6 +155,23 @@ func (s *CollectionService) GetUserCollections(ctx context.Context, userID uuid.
 
 // UpdateCollection updates a collection
 func (s *CollectionService) UpdateCollection(ctx context.Context, collectionID uuid.UUID, name, description, color, icon string, autoAssignRules []Rule, viewSettings map[string]any) (database.Collections, error) {
+	// A2c §3.3: the edit form carries only the toggles it renders — merge
+	// them OVER the stored view_settings so provenance keys
+	// (imported_from_series) and anything else on the row survive.
+	if len(viewSettings) > 0 {
+		existing, err := s.db.GetCollection(ctx, pgtype.UUID{Bytes: collectionID, Valid: true})
+		if err == nil && len(existing.ViewSettings) > 0 {
+			var stored map[string]any
+			if json.Unmarshal(existing.ViewSettings, &stored) == nil {
+				merged := stored
+				for k, v := range viewSettings {
+					merged[k] = v
+				}
+				viewSettings = merged
+			}
+		}
+	}
+
 	// Convert rules to JSONB ([]byte)
 	var rulesJSON []byte
 	if len(autoAssignRules) > 0 {

templates/book_detail.templ

@@ -63,7 +63,14 @@ templ BookDetail(user User, book handlers.MediaDetail, errorMessage string, tomb
 						<!-- Details -->
 						<div class="flex-1 min-w-0">
 							<h1 class="text-3xl md:text-4xl font-bold tracking-tight mb-2" style="color: var(--text-primary)">{ book.Title }</h1>
-							if book.Author.Valid && book.Author.String != "" {
+							if book.Subtitle.Valid && book.Subtitle.String != "" {
+								<p class="text-lg mb-2" style="color: var(--text-secondary)">{ book.Subtitle.String }</p>
+							}
+							if len(book.Authors) > 0 {
+								<h2 class="text-lg md:text-xl mb-5" style="color: var(--text-secondary)">
+									by { strings.Join(book.Authors, ", ") }
+								</h2>
+							} else if book.Author.Valid && book.Author.String != "" {
 								<h2 class="text-lg md:text-xl mb-5" style="color: var(--text-secondary)">
 									by { book.Author.String }
 								</h2>
@@ -184,6 +191,9 @@ templ BookDetail(user User, book handlers.MediaDetail, errorMessage string, tomb
 							}
 							<!-- Badges: series, direction, tags -->
 							<div class="flex flex-wrap items-center gap-2 mb-3">
+								if book.Explicit {
+									<span class="badge" style="border: 1px solid var(--border); color: var(--text-secondary);" title="Marked explicit in source metadata">Explicit</span>
+								}
 								if book.Series.Valid && book.Series.String != "" {
 									<a
 										href={ "/series/detail?name=" + url.QueryEscape(book.Series.String) + "&library_id=" + uuidToString(book.LibraryID) }

templates/book_detail_modals.templ

@@ -323,9 +323,13 @@ templ MetadataEditorModal(book handlers.MediaDetail) {
 								<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Title</label>
 								<input type="text" name="title" value={ book.Title } class="input" />
 							</div>
+							<div>
+								<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Subtitle</label>
+								<input type="text" name="subtitle" value={ textToString(book.Subtitle) } class="input" />
+							</div>
 							<div>
 								<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Author</label>
-								<input type="text" name="author" value={ textToString(book.Author) } class="input" />
+								<input type="text" name="authors" value={ authorsFormValue(book.Authors, textToString(book.Author)) } class="input" placeholder="Comma-separated names"/>
 							</div>
 							<div>
 								<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Description</label>
@@ -400,7 +404,7 @@ templ MetadataEditorModal(book handlers.MediaDetail) {
 						<div x-show="openSections.publication" x-transition class="p-4 space-y-3 border-t" style="border-color: var(--border);">
 							<div>
 								<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Publisher</label>
-								<input type="text" name="publisher" value={ textToString(book.Publisher) } class="input" />
+								<input type="text" name="publishers" value={ authorsFormValue(book.Publishers, textToString(book.Publisher)) } class="input" placeholder="Comma-separated publishers"/>
 							</div>
 							<div>
 								<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Date Published</label>
@@ -446,7 +450,7 @@ templ MetadataEditorModal(book handlers.MediaDetail) {
 							<div class="grid grid-cols-3 gap-3">
 								<div>
 									<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Number</label>
-									<input type="number" name="series_number"
+									<input type="number" name="series_number" step="any"
 										value={ fmtNumber(book.SeriesNumber.Float64) }
 										class="input" />
 								</div>
@@ -524,6 +528,12 @@ templ MetadataEditorModal(book handlers.MediaDetail) {
 										<span>Abridged edition</span>
 									</label>
 								</div>
+								<div>
+									<label class="flex items-center gap-2 text-sm" style="color: var(--text-primary);">
+										<input type="checkbox" name="explicit" checked={ book.Explicit } class="h-4 w-4 accent-current"/>
+										<span>Explicit content</span>
+									</label>
+								</div>
 								if book.AudioDuration() > 0 {
 									<div>
 										<label class="block text-xs font-semibold uppercase tracking-wide mb-1" style="color: var(--text-secondary);">Duration (scanned)</label>

templates/collection_modal.templ

@@ -72,6 +72,18 @@ templ CollectionModal(collection CollectionData) {
 							<button type="button" @click="selectColor('purple')" data-color="purple" class="w-8 h-8 rounded-full color-option bg-purple-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-purple-400" aria-label="Purple"></button>
 						</div>
 						<input type="hidden" name="color" id="collection-color" value={ collection.Color }/>
+						<div class="mb-4 space-y-2">
+							<label class="flex items-center gap-2 text-sm" style="color: var(--text-primary);">
+								<input type="hidden" name="hide_finished" value="false"/>
+								<input type="checkbox" name="hide_finished" value="true" checked={ collection.HideFinished } class="h-4 w-4 accent-current"/>
+								<span>Hide finished books (reading-queue mode)</span>
+							</label>
+							<label class="flex items-center gap-2 text-sm" style="color: var(--text-primary);">
+								<input type="hidden" name="show_up_next" value="false"/>
+								<input type="checkbox" name="show_up_next" value="true" checked={ collection.ShowUpNext } class="h-4 w-4 accent-current"/>
+								<span>Show Up Next strip</span>
+							</label>
+						</div>
 					</div>
 					<div class="flex justify-end space-x-3">
 						<button type="button" @click="closeCollectionModal()" class="btn btn-secondary">Cancel</button>

templates/collection_modal_templ.go

@@ -143,30 +143,56 @@ func CollectionModal(collection CollectionData) templ.Component {
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 13, "\"></div><div class=\"flex justify-end space-x-3\"><button type=\"button\" @click=\"closeCollectionModal()\" class=\"btn btn-secondary\">Cancel</button> <button type=\"submit\" class=\"btn btn-primary\">Update Collection</button></div></form>")
-			if templ_7745c5c3_Err != nil {
-				return templ_7745c5c3_Err
-			}
-		} else {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 14, "<form hx-post=\"/api/collections\" hx-redirect=\"/collections\"><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Type</label><div class=\"grid grid-cols-2 gap-2\"><label class=\"relative cursor-pointer\"><input type=\"radio\" name=\"collection_type\" value=\"static\" checked class=\"peer sr-only\"><div class=\"p-3 rounded-lg border text-center peer-checked:border-blue-500\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"><span class=\"font-semibold text-sm\" style=\"color: var(--text-primary)\">Static</span><p class=\"text-xs mt-1\" style=\"color: var(--text-secondary)\">Pick books by hand</p></div></label> <label class=\"relative cursor-pointer\"><input type=\"radio\" name=\"collection_type\" value=\"smart\" class=\"peer sr-only\"><div class=\"p-3 rounded-lg border text-center peer-checked:border-blue-500 peer-checked:ring-2 peer-checked:ring-blue-400\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"><span class=\"font-semibold text-sm\" style=\"color: var(--text-primary)\">⚡ Smart</span><p class=\"text-xs mt-1\" style=\"color: var(--text-secondary)\">Match books by rules — always live</p></div></label></div></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Name</label> <input type=\"text\" name=\"name\" required class=\"input\" placeholder=\"My Reading List\"></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Description</label> <textarea name=\"description\" class=\"input\" placeholder=\"Optional description\" rows=\"3\"></textarea></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Icon</label> <input type=\"text\" id=\"icon-search\" class=\"input mb-2\" placeholder=\"Search or type emoji...\" maxlength=\"4\" @input=\"filterIcons($event.target.value)\" @focus=\"showAllIcons()\"> <input type=\"hidden\" name=\"icon\" id=\"collection-icon\" value=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 13, "\"><div class=\"mb-4 space-y-2\"><label class=\"flex items-center gap-2 text-sm\" style=\"color: var(--text-primary);\"><input type=\"hidden\" name=\"hide_finished\" value=\"false\"> <input type=\"checkbox\" name=\"hide_finished\" value=\"true\" checked=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			var templ_7745c5c3_Var8 string
-			templ_7745c5c3_Var8, templ_7745c5c3_Err = templ.ResolveAttributeValue(collection.Icon)
+			templ_7745c5c3_Var8, templ_7745c5c3_Err = templ.ResolveAttributeValue(collection.HideFinished)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `collection_modal.templ`, Line: 135, Col: 83}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `collection_modal.templ`, Line: 78, Col: 98}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var8)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 15, "\"><div id=\"icon-grid\" class=\"grid grid-cols-8 gap-1 max-h-32 overflow-y-auto p-2 rounded-lg border\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"></div></div><div class=\"mb-6\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Color</label><div class=\"flex gap-2\"><button type=\"button\" @click=\"selectColor('blue')\" data-color=\"blue\" class=\"w-8 h-8 rounded-full color-option bg-blue-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-blue-400\" aria-label=\"Blue\"></button> <button type=\"button\" @click=\"selectColor('red')\" data-color=\"red\" class=\"w-8 h-8 rounded-full color-option bg-red-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-red-400\" aria-label=\"Red\"></button> <button type=\"button\" @click=\"selectColor('yellow')\" data-color=\"yellow\" class=\"w-8 h-8 rounded-full color-option bg-yellow-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-yellow-400\" aria-label=\"Yellow\"></button> <button type=\"button\" @click=\"selectColor('green')\" data-color=\"green\" class=\"w-8 h-8 rounded-full color-option bg-green-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-green-400\" aria-label=\"Green\"></button> <button type=\"button\" @click=\"selectColor('purple')\" data-color=\"purple\" class=\"w-8 h-8 rounded-full color-option bg-purple-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-purple-400\" aria-label=\"Purple\"></button></div><input type=\"hidden\" name=\"color\" id=\"collection-color\" value=\"blue\"></div><div class=\"flex justify-end space-x-3\"><button type=\"button\" @click=\"closeCollectionModal()\" class=\"btn btn-secondary\">Cancel</button> <button type=\"submit\" class=\"btn btn-primary\">Create Collection</button></div></form>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 14, "\" class=\"h-4 w-4 accent-current\"> <span>Hide finished books (reading-queue mode)</span></label> <label class=\"flex items-center gap-2 text-sm\" style=\"color: var(--text-primary);\"><input type=\"hidden\" name=\"show_up_next\" value=\"false\"> <input type=\"checkbox\" name=\"show_up_next\" value=\"true\" checked=\"")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var9 string
+			templ_7745c5c3_Var9, templ_7745c5c3_Err = templ.ResolveAttributeValue(collection.ShowUpNext)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `collection_modal.templ`, Line: 83, Col: 95}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var9)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 15, "\" class=\"h-4 w-4 accent-current\"> <span>Show Up Next strip</span></label></div></div><div class=\"flex justify-end space-x-3\"><button type=\"button\" @click=\"closeCollectionModal()\" class=\"btn btn-secondary\">Cancel</button> <button type=\"submit\" class=\"btn btn-primary\">Update Collection</button></div></form>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		} else {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 16, "<form hx-post=\"/api/collections\" hx-redirect=\"/collections\"><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Type</label><div class=\"grid grid-cols-2 gap-2\"><label class=\"relative cursor-pointer\"><input type=\"radio\" name=\"collection_type\" value=\"static\" checked class=\"peer sr-only\"><div class=\"p-3 rounded-lg border text-center peer-checked:border-blue-500\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"><span class=\"font-semibold text-sm\" style=\"color: var(--text-primary)\">Static</span><p class=\"text-xs mt-1\" style=\"color: var(--text-secondary)\">Pick books by hand</p></div></label> <label class=\"relative cursor-pointer\"><input type=\"radio\" name=\"collection_type\" value=\"smart\" class=\"peer sr-only\"><div class=\"p-3 rounded-lg border text-center peer-checked:border-blue-500 peer-checked:ring-2 peer-checked:ring-blue-400\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"><span class=\"font-semibold text-sm\" style=\"color: var(--text-primary)\">⚡ Smart</span><p class=\"text-xs mt-1\" style=\"color: var(--text-secondary)\">Match books by rules — always live</p></div></label></div></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Name</label> <input type=\"text\" name=\"name\" required class=\"input\" placeholder=\"My Reading List\"></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Description</label> <textarea name=\"description\" class=\"input\" placeholder=\"Optional description\" rows=\"3\"></textarea></div><div class=\"mb-4\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Icon</label> <input type=\"text\" id=\"icon-search\" class=\"input mb-2\" placeholder=\"Search or type emoji...\" maxlength=\"4\" @input=\"filterIcons($event.target.value)\" @focus=\"showAllIcons()\"> <input type=\"hidden\" name=\"icon\" id=\"collection-icon\" value=\"")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var10 string
+			templ_7745c5c3_Var10, templ_7745c5c3_Err = templ.ResolveAttributeValue(collection.Icon)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `collection_modal.templ`, Line: 147, Col: 83}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var10)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 17, "\"><div id=\"icon-grid\" class=\"grid grid-cols-8 gap-1 max-h-32 overflow-y-auto p-2 rounded-lg border\" style=\"background-color: var(--bg-primary); border-color: var(--border);\"></div></div><div class=\"mb-6\"><label class=\"block text-xs font-semibold uppercase tracking-wide mb-2\" style=\"color: var(--text-secondary)\">Color</label><div class=\"flex gap-2\"><button type=\"button\" @click=\"selectColor('blue')\" data-color=\"blue\" class=\"w-8 h-8 rounded-full color-option bg-blue-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-blue-400\" aria-label=\"Blue\"></button> <button type=\"button\" @click=\"selectColor('red')\" data-color=\"red\" class=\"w-8 h-8 rounded-full color-option bg-red-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-red-400\" aria-label=\"Red\"></button> <button type=\"button\" @click=\"selectColor('yellow')\" data-color=\"yellow\" class=\"w-8 h-8 rounded-full color-option bg-yellow-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-yellow-400\" aria-label=\"Yellow\"></button> <button type=\"button\" @click=\"selectColor('green')\" data-color=\"green\" class=\"w-8 h-8 rounded-full color-option bg-green-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-green-400\" aria-label=\"Green\"></button> <button type=\"button\" @click=\"selectColor('purple')\" data-color=\"purple\" class=\"w-8 h-8 rounded-full color-option bg-purple-500 hover:ring-2 hover:ring-offset-2 hover:ring-offset-transparent hover:ring-purple-400\" aria-label=\"Purple\"></button></div><input type=\"hidden\" name=\"color\" id=\"collection-color\" value=\"blue\"></div><div class=\"flex justify-end space-x-3\"><button type=\"button\" @click=\"closeCollectionModal()\" class=\"btn btn-secondary\">Cancel</button> <button type=\"submit\" class=\"btn btn-primary\">Create Collection</button></div></form>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 16, "</div></div>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 18, "</div></div>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}

templates/collections.templ

@@ -36,6 +36,12 @@ templ CollectionBooksGrid(collection CollectionData, books []handlers.BookInfo)
 												@change={ "toggleSelection(" + JSONArg(book.MediaItemID) + ")" }
 											/>
 										</label>
+										<div class="flex flex-col items-center gap-0.5 mt-1">
+											<button type="button" class="icon-btn text-xs" title="Move earlier (playlist order)"
+												@click={ "moveCollectionBook(" + JSONArg(book.MediaItemID) + ", -1)" }>↑</button>
+											<button type="button" class="icon-btn text-xs" title="Move later (playlist order)"
+												@click={ "moveCollectionBook(" + JSONArg(book.MediaItemID) + ", 1)" }>↓</button>
+										</div>
 									</div>
 								}
 								<div class="flex-1 min-w-0">

templates/types.go

@@ -31,6 +31,10 @@ type CollectionData struct {
 	Color       string
 	Icon        string
 	IsSystem    bool
+	// A2c §3.3: playlist toggles (static collections only). Hidden fields
+	// preserve the current values on submit; absent from the create form.
+	HideFinished bool
+	ShowUpNext   bool
 	// IsSmart marks rule-based ("dynamic") collections: membership is
 	// evaluated live at render, not stored in collection_items.
 	IsSmart bool

templates/utils.go

@@ -475,3 +475,13 @@ func LibraryTypeDisplayName(name string) string {
 func fmtNumber(f float64) string {
 	return strconv.FormatFloat(f, 'f', -1, 64)
 }
+
+// authorsFormValue prefills an editable comma-separated author/publisher
+// field: the array is the write truth; the legacy single value is the
+// fallback for rows predating the arrays.
+func authorsFormValue(arr []string, legacy string) string {
+	if len(arr) > 0 {
+		return strings.Join(arr, ", ")
+	}
+	return legacy
+}

web/src/book-detail.ts

@@ -98,6 +98,20 @@ function collectFormData(editorTags: string[]): Record<string, unknown> {
     else delete data.narrators;
   }
 
+  // A2b: authors/publishers are arrays server-side (write truth); the form
+  // fields are comma-separated strings exactly like narrators.
+  for (const key of ["authors", "publishers"] as const) {
+    const raw = data[key] as string;
+    if (typeof raw === "string") {
+      const list = raw
+        .split(",")
+        .map((v: string) => v.trim())
+        .filter(Boolean);
+      if (list.length) data[key] = list;
+      else delete data[key];
+    }
+  }
+
   return data;
 }
 

web/src/collections.ts

@@ -541,6 +541,7 @@ export {
   showAllIcons,
   testRule,
   toggleSelection,
+  moveCollectionBook,
 };
 
 Alpine.data("collections", () => ({
@@ -553,6 +554,7 @@ Alpine.data("collections", () => ({
   initializeCollectionWebSocket,
   initCollectionsPage,
   loadCollectionRules,
+  moveCollectionBook,
   navigateToCollection,
   populateIconGrid,
   selectColor,
@@ -594,3 +596,67 @@ Alpine.data("collections", () => ({
     this.pendingAction = null;
   },
 }));
+
+// A2c §3.2: playlist ordering — move a card one slot and persist the full
+// resulting order. The DOM cards are the server-rendered truth for CURRENT
+// order; the API is the truth for SAVED order. On failure the grid refresh
+// from the templ partial so the UI never lies.
+async function moveCollectionBook(
+  this: any,
+  mediaId: string,
+  direction: number,
+): Promise<void> {
+  const container = document.getElementById("books-container");
+  if (!container) return;
+  const cards = Array.from(
+    container.querySelectorAll<HTMLElement>(".collection-book-card"),
+  );
+  const index = cards.findIndex(
+    (c) => c.dataset.mediaId === mediaId,
+  );
+  const target = index + direction;
+  if (index < 0 || target < 0 || target >= cards.length) return;
+
+  // Optimistic DOM swap (client-local state until the API confirms).
+  if (direction < 0) {
+    container.insertBefore(cards[index], cards[target]);
+  } else {
+    container.insertBefore(cards[target], cards[index]);
+  }
+
+  const orderedIds = Array.from(
+    container.querySelectorAll<HTMLElement>(".collection-book-card"),
+  )
+    .map((c) => c.dataset.mediaId)
+    .filter((id): id is string => Boolean(id));
+
+  const token = localStorage.getItem("token");
+  if (!token) return;
+  try {
+    const response = await fetch(
+      `/api/collections/${getCollectionId()}/items/order`,
+      {
+        method: "PUT",
+        headers: {
+          Authorization: `Bearer ${token}`,
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ item_ids: orderedIds }),
+      },
+    );
+    if (!response.ok) {
+      showToast("Failed to save the new order", "error");
+      // Rendering ownership: the templ partial re-renders the true order.
+      const gridTarget = document.getElementById("books-container");
+      if (gridTarget && (window as any).htmx) {
+        (window as any).htmx.ajax(
+          "GET",
+          `/collections/${getCollectionId()}/books-grid${window.location.search.startsWith("?") ? window.location.search : ""}`,
+          { target: "#books-container", swap: "innerHTML" },
+        );
+      }
+    }
+  } catch {
+    showToast("Failed to save the new order", "error");
+  }
+}

web/src/dashboard.ts

@@ -199,13 +199,36 @@ async function restoreSystemCollection(
 }
 
 function renderSectionHTML(section: SectionData): string {
+  // A2c §3.5: a fully-read playlist (hide_finished drained the queue)
+  // renders its completion state instead of book cards.
+  if (section.complete) {
+    return `
+        <div class="dashboard-collection mb-8" data-collection-id="${section.id}">
+            <div class="flex items-center justify-between mb-4">
+                <div class="flex items-center gap-3">
+                    <span class="text-2xl">${section.icon}</span>
+                    <div>
+                        <h2 class="text-xl font-bold" style="color: var(--text-primary)">${section.title}
+                            <span class="badge ml-2" style="background-color: var(--accent-muted); color: var(--accent);">✓ Playlist complete</span>
+                        </h2>
+                        ${section.description ? `<p class="text-sm" style="color: var(--text-secondary)">${section.description}</p>` : ""}
+                    </div>
+                </div>
+                ${section.view_all_url ? `<a href="${section.view_all_url}" class="text-sm font-medium hover:underline" style="color: var(--accent);">View All →</a>` : ""}
+            </div>
+            <div class="card p-6 text-sm" style="color: var(--text-secondary)">Every book in this playlist is finished. Time to add the next one.</div>
+        </div>`;
+  }
+  const playlistBadge = section.is_playlist
+    ? `<span class="badge" style="background-color: var(--accent-muted); color: var(--accent);" title="Curated reading order">📖 Playlist</span>`
+    : "";
   return `
         <div class="dashboard-collection mb-8" data-collection-id="${section.id}">
             <div class="flex items-center justify-between mb-4">
                 <div class="flex items-center gap-3">
                     <span class="text-2xl">${section.icon}</span>
                     <div>
-                        <h2 class="text-xl font-bold" style="color: var(--text-primary)">${section.title}</h2>
+                        <h2 class="text-xl font-bold" style="color: var(--text-primary)">${section.title}${playlistBadge}</h2>
                         ${section.description ? `<p class="text-sm" style="color: var(--text-secondary)">${section.description}</p>` : ""}
                     </div>
                 </div>

web/src/types/api.d.ts

@@ -119,6 +119,10 @@ interface SectionData {
   items: BookInfo[];
   view_all_url: string;
   priority: number;
+  // A2c (2026-10-19): imported reading-order playlist + hide_finished
+  // completion state — see docs/contract_pins.md.
+  is_playlist: boolean;
+  complete: boolean;
 }
 
 // Matches database.UserDashboardPreferences and dashboard preferences API