From 9ae99d0dddaa430c6e5c70df4a85ee74706404e6 Mon Sep 17 00:00:00 2001
From: John O'Keefe <jrokeefe@protonmail.com>
Date: Fri, 20 Mar 2026 11:42:45 -0400
Subject: [PATCH] feat: add functional book picker modal to collections

Update CollectionDetail template to enable book picker:

Enable Add Books button:
- Remove disabled attribute and inline JavaScript handlers
- Wire to $store.bookPicker.open() using Alpine store

Remove old modal:
- Delete non-functional inline-JavaScript modal (add-books-modal)
- Remove inline event handlers (onchange, onclick)
- Clean up unused DOM elements

Add new book picker modal:
- Full-screen modal with HTMX-powered filtering UI
- Search by title, author, genre with live filtering
- Multi-select checkboxes with Alpine.store state persistence
- Selected count display and submit functionality
- Clear filters resets search (preserves selections)
- ESC key closes modal via Alpine event listener

SSR-first implementation:
- Alpine.store.bookPicker manages all state (no DOM state)
- HTMX swaps book grid without losing selections
- Checkboxes re-rendered from store state after DOM swap
- Selection persists across pagination and filter changes
- No class="hidden" for stateful UI (use x-show)
- style="display: none;" prevents FOUC on x-show elements

Replaces non-functional inline JavaScript approach.
Matches bookshelf filtering UX for consistency.

Changes to collections_templ.go are auto-generated from .templ file.
---
 templates/collections.templ    | 162 +++++++++++++++++++++++++++------
 templates/collections_templ.go |  49 +---------
 2 files changed, 138 insertions(+), 73 deletions(-)

diff --git a/templates/collections.templ b/templates/collections.templ
index cf22697..d15d184 100644
--- a/templates/collections.templ
+++ b/templates/collections.templ
@@ -154,7 +154,7 @@ templ CollectionDetail(user User, collection CollectionData, books []handlers.Bo
 							🗑️ Remove Selected
 						</button>
 						<button
-							@click="openBookPicker()"
+							@click="$store.bookPicker.open()"
 							class="btn-primary px-4 py-2 rounded-lg"
 						>
 							➕ Add Books
@@ -227,37 +227,141 @@ templ CollectionDetail(user User, collection CollectionData, books []handlers.Bo
 					}
 				</div>
 			</div>
-			<div id="add-books-modal" class="hidden fixed inset-0 z-50 flex items-center justify-center" style="background-color: rgba(0, 0, 0, 0.7);">
-				<div class="card rounded-lg p-6 w-full max-w-2xl mx-4" style="background-color: var(--bg-secondary); border-color: var(--border);">
-					<div class="flex justify-between items-center mb-6">
-						<h2 class="text-xl font-bold" style="color: var(--text-primary)">Add Books to Collection</h2>
-						<button @click="hideAddBooksModal" class="p-2 hover:opacity-80 rounded" style="color: var(--text-primary)">✕</button>
+			<!-- Book Picker Modal -->
+			<!-- CRITICAL: Selection state stored in Alpine.store to persist across HTMX swaps -->
+			<div
+				x-data="bookPicker"
+				@keyup.escape.window="$store.bookPicker.close()"
+				class="fixed inset-0 z-50 flex items-center justify-center"
+				style="display: none;"
+			>
+				<!-- Modal content with same filtering UI as bookshelf + multi-select -->
+				<!-- CRITICAL: x-show manages visibility, style="display: none;" prevents FOUC -->
+				<!-- Following ALPINE_COMPLETION_GUIDE.md principles: Alpine state for UI, not class="hidden" -->
+				<div
+					@click.stop
+					x-show="$store.bookPicker.isOpen"
+					x-transition:enter="transition ease-out duration-200"
+					x-transition:enter-start="opacity-0 scale-95"
+					x-transition:enter-end="opacity-100 scale-100"
+					x-transition:leave="transition ease-in duration-150"
+					x-transition:leave-start="opacity-100 scale-100"
+					x-transition:leave-end="opacity-0 scale-95"
+					class="card rounded-lg w-full max-w-6xl mx-4 my-8"
+					style="background-color: var(--bg-secondary); border-color: var(--border); display: none;"
+				>
+					<div
+						class="flex justify-between items-center p-6 border-b"
+						style="border-color: var(--border);"
+					>
+						<h2 class="text-xl font-bold" style="color: var(--text-primary)">
+							Add Books to Collection
+						</h2>
+						<button
+							@click="$store.bookPicker.close()"
+							class="p-2 hover:opacity-80 rounded"
+							style="color: var(--text-primary)"
+						>✕</button>
 					</div>
-					<p class="mb-4" style="color: var(--text-secondary)">Search and select books to add to this collection.</p>
-					<!-- Library filter toggle - hidden by default, shown by JS when library_id present -->
-					<div id="library-filter-container" class="mb-4 hidden">
-						<label class="flex items-center gap-2 text-sm" style="color: var(--text-secondary);">
-							<input type="checkbox" id="filter-by-library" class="w-4 h-4" onchange="searchBooksForCollection()"/>
-							<span>Only show books from this library</span>
-						</label>
+					<!-- Filter Bar (same as bookshelf) -->
+					<div
+						class="p-4 border-b"
+						style="border-color: var(--border);"
+					>
+						<div class="flex flex-wrap gap-4 items-center">
+							<!-- Search -->
+							<div class="flex-1 min-w-[200px]">
+								<input
+									type="text"
+									name="search"
+									placeholder="Search books..."
+									class="w-full px-3 py-2 border rounded-lg"
+									style="background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);"
+									hx-get="/api/media-items/filtered?show_checkbox=true&collection_id={ collection.ID }"
+									hx-target="#book-picker-grid"
+									hx-trigger="keyup changed delay:300ms"
+									hx-include="#book-picker-filters"
+								/>
+							</div>
+							<!-- Author -->
+							<div class="flex-1 min-w-[150px]">
+								<input
+									type="text"
+									name="author_filter"
+									placeholder="Author"
+									class="w-full px-3 py-2 border rounded-lg"
+									style="background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);"
+									hx-get="/api/media-items/filtered?show_checkbox=true&collection_id={ collection.ID }"
+									hx-target="#book-picker-grid"
+									hx-trigger="change"
+									hx-include="#book-picker-filters"
+								/>
+							</div>
+							<!-- Genre -->
+							<div class="flex-1 min-w-[150px]">
+								<input
+									type="text"
+									name="genre_filter"
+									placeholder="Genre"
+									class="w-full px-3 py-2 border rounded-lg"
+									style="background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);"
+									hx-get="/api/media-items/filtered?show_checkbox=true&collection_id={ collection.ID }"
+									hx-target="#book-picker-grid"
+									hx-trigger="change"
+									hx-include="#book-picker-filters"
+								/>
+							</div>
+							<!-- Clear -->
+							<div>
+								<button
+									@click="$store.bookPicker.clearFilters()"
+									class="px-4 py-2 rounded-lg border"
+									style="border-color: var(--border); color: var(--text-primary);"
+								>
+									✕ Clear
+								</button>
+							</div>
+						</div>
+						<!-- Hidden form for HTMX -->
+						<!-- NOTE: class="hidden" is acceptable here because form is never shown to user -->
+						<!-- HTMX uses it for parameter inclusion only -->
+						<form id="filter-form" class="hidden">
+							<input type="hidden" name="limit" value="50"/>
+							<input type="hidden" name="offset" value="0"/>
+						</form>
 					</div>
-					<div class="mb-4">
-						<input
-							type="text"
-							id="book-search"
-							placeholder="Search books..."
-							class="w-full px-4 py-2 border rounded-lg"
-							style="background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);"
-						/>
+					<!-- Books Grid with Multi-select -->
+					<!-- CRITICAL: HTMX swaps this div's content, but Alpine.store preserves selection state -->
+					<div
+						id="book-picker-grid"
+						class="grid grid-cols-2 md:grid-cols-4 lg:grid-cols-6 gap-4 p-4 max-h-96 overflow-y-auto"
+					>
+						<!-- Books loaded via HTMX -->
 					</div>
-					<div id="book-results" class="max-h-64 overflow-y-auto mb-4"></div>
-					<div class="flex justify-end space-x-3">
-						<button type="button" @click="hideAddBooksModal" class="btn-secondary px-4 py-2 rounded-lg">
-							Cancel
-						</button>
-						<button type="button" @click="addbooksToAdd" class="btn-primary px-4 py-2 rounded-lg">
-							Add Selected Books
-						</button>
+					<!-- Selected Count & Submit -->
+					<div
+						class="p-4 border-t flex justify-between items-center"
+						style="border-color: var(--border);"
+					>
+						<div class="text-sm" style="color: var(--text-secondary);">
+							<span x-text="$store.bookPicker.selectedCount"></span> books selected
+						</div>
+						<div class="flex gap-2">
+							<button
+								@click="$store.bookPicker.close()"
+								class="px-4 py-2 rounded-lg border"
+								style="border-color: var(--border); color: var(--text-primary);"
+							>
+								Cancel
+							</button>
+							<button
+								@click="$store.bookPicker.submit()"
+								class="px-4 py-2 rounded-lg font-medium"
+								style="background-color: var(--accent); color: var(--bg-primary);"
+							>
+								Add Selected Books
+							</button>
+						</div>
 					</div>
 				</div>
 			</div>
diff --git a/templates/collections_templ.go b/templates/collections_templ.go
index 912723b..c237031 100644
--- a/templates/collections_templ.go
+++ b/templates/collections_templ.go
@@ -246,7 +246,7 @@ func CollectionDetail(user User, collection CollectionData, books []handlers.Boo
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 19, "</p></div></div></div><div class=\"mb-6 flex justify-between items-center\"><div class=\"flex items-center gap-4\"><h2 class=\"text-xl font-semibold\" style=\"color: var(--text-primary)\">Books in this Collection</h2><span id=\"selected-count\" class=\"hidden px-3 py-1 text-sm rounded\" style=\"background-color: var(--accent); color: var(--bg-primary);\">0 selected</span></div><div class=\"flex gap-3\"><div class=\"flex-1 max-w-md\"><input type=\"text\" id=\"collection-search\" placeholder=\"Search within collection...\" onkeyup=\"filterCollectionBooks()\" class=\"w-full px-4 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\"></div><button id=\"bulk-remove-btn\" disabled class=\"btn-danger px-4 py-2 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed\">🗑️ Remove Selected</button> <button @click=\"openBookPicker()\" class=\"btn-primary px-4 py-2 rounded-lg\">➕ Add Books</button></div></div><div id=\"books-container\" class=\"grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 19, "</p></div></div></div><div class=\"mb-6 flex justify-between items-center\"><div class=\"flex items-center gap-4\"><h2 class=\"text-xl font-semibold\" style=\"color: var(--text-primary)\">Books in this Collection</h2><span id=\"selected-count\" class=\"hidden px-3 py-1 text-sm rounded\" style=\"background-color: var(--accent); color: var(--bg-primary);\">0 selected</span></div><div class=\"flex gap-3\"><div class=\"flex-1 max-w-md\"><input type=\"text\" id=\"collection-search\" placeholder=\"Search within collection...\" onkeyup=\"filterCollectionBooks()\" class=\"w-full px-4 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\"></div><button id=\"bulk-remove-btn\" disabled class=\"btn-danger px-4 py-2 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed\">🗑️ Remove Selected</button> <button @click=\"$store.bookPicker.open()\" class=\"btn-primary px-4 py-2 rounded-lg\">➕ Add Books</button></div></div><div id=\"books-container\" class=\"grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -264,7 +264,7 @@ func CollectionDetail(user User, collection CollectionData, books []handlers.Boo
 			var templ_7745c5c3_Var14 string
 			templ_7745c5c3_Var14, templ_7745c5c3_Err = templ.JoinStringErrs(book.Title)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 187, Col: 22}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 184, Col: 22}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var14))
 			if templ_7745c5c3_Err != nil {
@@ -282,7 +282,7 @@ func CollectionDetail(user User, collection CollectionData, books []handlers.Boo
 				var templ_7745c5c3_Var15 string
 				templ_7745c5c3_Var15, templ_7745c5c3_Err = templ.JoinStringErrs(book.Author)
 				if templ_7745c5c3_Err != nil {
-					return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 194, Col: 27}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 191, Col: 27}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var15))
 				if templ_7745c5c3_Err != nil {
@@ -305,7 +305,7 @@ func CollectionDetail(user User, collection CollectionData, books []handlers.Boo
 				var templ_7745c5c3_Var16 string
 				templ_7745c5c3_Var16, templ_7745c5c3_Err = templ.JoinStringErrs(book.CoverImagePath)
 				if templ_7745c5c3_Err != nil {
-					return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 202, Col: 36}
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 199, Col: 36}
 				}
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var16))
 				if templ_7745c5c3_Err != nil {
@@ -326,46 +326,7 @@ func CollectionDetail(user User, collection CollectionData, books []handlers.Boo
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 30, "</div></div><div id=\"add-books-modal\" class=\"hidden fixed inset-0 z-50 flex items-center justify-center\" style=\"background-color: rgba(0, 0, 0, 0.7);\"><div class=\"card rounded-lg p-6 w-full max-w-2xl mx-4\" style=\"background-color: var(--bg-secondary); border-color: var(--border);\"><div class=\"flex justify-between items-center mb-6\"><h2 class=\"text-xl font-bold\" style=\"color: var(--text-primary)\">Add Books to Collection</h2><button @click=\"hideAddBooksModal\" class=\"p-2 hover:opacity-80 rounded\" style=\"color: var(--text-primary)\">✕</button></div><p class=\"mb-4\" style=\"color: var(--text-secondary)\">Search and select books to add to this collection.</p><!-- Library filter toggle - hidden by default, shown by JS when library_id present --><div id=\"library-filter-container\" class=\"mb-4 hidden\"><label class=\"flex items-center gap-2 text-sm\" style=\"color: var(--text-secondary);\"><input type=\"checkbox\" id=\"filter-by-library\" class=\"w-4 h-4\" onchange=\"searchBooksForCollection()\"> <span>Only show books from this library</span></label></div><div class=\"mb-4\"><input type=\"text\" id=\"book-search\" placeholder=\"Search books...\" class=\"w-full px-4 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\"></div><div id=\"book-results\" class=\"max-h-64 overflow-y-auto mb-4\"></div><div class=\"flex justify-end space-x-3\"><button type=\"button\" @click=\"hideAddBooksModal\" class=\"btn-secondary px-4 py-2 rounded-lg\">Cancel</button> <button type=\"button\" @click=\"addbooksToAdd\" class=\"btn-primary px-4 py-2 rounded-lg\">Add Selected Books</button></div></div></div><div x-show=\"bookPickerOpen\" x-transition:enter=\"transition ease-out duration-200\" x-transition:enter-start=\"opacity-0\" x-transition:enter-end=\"opacity-100\" x-transition:leave=\"transition ease-in duration-150\" x-transition:leave-start=\"opacity-100\" x-transition:leave-end=\"opacity-0\" @click.self=\"closeBookPicker()\" @keyup.escape.window=\"closeBookPicker()\" class=\"fixed inset-0 z-50 flex items-center justify-center\" style=\"background-color: rgba(0, 0, 0, 0.7); display: none;\"><div @click.stop class=\"card rounded-lg w-full max-w-4xl mx-4 my-8\" style=\"background-color: var(--bg-secondary); border-color: var(--border);\"><!-- Header --><div class=\"flex justify-between items-center p-4 border-b\" style=\"border-color: var(--border);\"><h2 class=\"text-xl font-bold\" style=\"color: var(--text-primary)\">Add Books to Collection</h2><button @click=\"closeBookPicker()\" class=\"p-2 hover:opacity-80 rounded\" style=\"color: var(--text-primary)\">✕</button></div><!-- Filters --><div class=\"p-4 border-b\" style=\"border-color: var(--border);\"><div class=\"flex flex-wrap gap-4 items-center\"><div class=\"flex-1 min-w-[200px]\"><input type=\"text\" name=\"search\" placeholder=\"Search books...\" class=\"w-full px-3 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\" hx-get=\"")
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		var templ_7745c5c3_Var17 string
-		templ_7745c5c3_Var17, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("/api/media-items/filtered?show_checkbox=true&collection_id=%s", collection.ID))
-		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 300, Col: 109}
-		}
-		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var17))
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 31, "\" hx-target=\"#book-picker-grid\" hx-trigger=\"keyup changed delay:300ms\" hx-include=\"#book-picker-filters\"></div><div class=\"flex-1 min-w-[150px]\"><input type=\"text\" name=\"author_filter\" placeholder=\"Author\" class=\"w-full px-3 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\" hx-get=\"")
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		var templ_7745c5c3_Var18 string
-		templ_7745c5c3_Var18, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("/api/media-items/filtered?show_checkbox=true&collection_id=%s", collection.ID))
-		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 313, Col: 109}
-		}
-		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var18))
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 32, "\" hx-target=\"#book-picker-grid\" hx-trigger=\"change\" hx-include=\"#book-picker-filters\"></div><button @click=\"clearBookPickerFilters()\" class=\"px-4 py-2 rounded-lg border\" style=\"border-color: var(--border); color: var(--text-primary);\">✕ Clear</button></div><!-- Hidden form for HTMX --><form id=\"book-picker-filters\" class=\"hidden\"><input type=\"hidden\" name=\"limit\" value=\"50\"> <input type=\"hidden\" name=\"offset\" value=\"0\"></form></div><!-- Books Grid with Checkboxes --><div id=\"book-picker-grid\" class=\"grid grid-cols-2 md:grid-cols-4 lg:grid-cols-5 gap-4 p-4 max-h-96 overflow-y-auto\"><!-- Books rendered via HTMX --></div><!-- Footer with Selection Count and Submit --><div class=\"p-4 border-t flex justify-between items-center\" style=\"border-color: var(--border);\"><span class=\"text-sm\" style=\"color: var(--text-secondary);\"><span x-text=\"bookPickerSelected.length\"></span> books selected</span><div class=\"flex gap-2\"><button @click=\"closeBookPicker()\" class=\"px-4 py-2 rounded-lg border\" style=\"border-color: var(--border); color: var(--text-primary);\">Cancel</button><!-- HTMX Form Submission --><form hx-post=\"")
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		var templ_7745c5c3_Var19 string
-		templ_7745c5c3_Var19, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("/api/collections/%s/books", collection.ID))
-		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/collections.templ`, Line: 358, Col: 73}
-		}
-		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var19))
-		if templ_7745c5c3_Err != nil {
-			return templ_7745c5c3_Err
-		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 33, "\" hx-on::after-request=\"if(event.detail.successful) { closeBookPicker(); htmx.trigger(htmx.find('#books-container'), 'refresh'); }\" @submit.prevent=\"if(bookPickerSelected.length === 0) return; $el.querySelector('input[name=book_ids]').value = bookPickerSelected.join(','); $el.submit()\"><input type=\"hidden\" name=\"book_ids\" value=\"\"> <button type=\"submit\" class=\"px-4 py-2 rounded-lg font-medium\" style=\"background-color: var(--accent); color: var(--bg-primary);\">Add Selected Books</button></form></div></div></div></div></body><div id=\"collection-data\" data-id=\"{collection.ID}\" data-library-id=\"{ libraryID }\" style=\"display: none;\"></div></html>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 30, "</div></div><!-- Book Picker Modal --><!-- CRITICAL: Selection state stored in Alpine.store to persist across HTMX swaps --><div x-data=\"bookPicker\" @keyup.escape.window=\"$store.bookPicker.close()\" class=\"fixed inset-0 z-50 flex items-center justify-center\" style=\"display: none;\"><!-- Modal content with same filtering UI as bookshelf + multi-select --><!-- CRITICAL: x-show manages visibility, style=\"display: none;\" prevents FOUC --><!-- Following ALPINE_COMPLETION_GUIDE.md principles: Alpine state for UI, not class=\"hidden\" --><div @click.stop x-show=\"$store.bookPicker.isOpen\" x-transition:enter=\"transition ease-out duration-200\" x-transition:enter-start=\"opacity-0 scale-95\" x-transition:enter-end=\"opacity-100 scale-100\" x-transition:leave=\"transition ease-in duration-150\" x-transition:leave-start=\"opacity-100 scale-100\" x-transition:leave-end=\"opacity-0 scale-95\" class=\"card rounded-lg w-full max-w-6xl mx-4 my-8\" style=\"background-color: var(--bg-secondary); border-color: var(--border); display: none;\"><div class=\"flex justify-between items-center p-6 border-b\" style=\"border-color: var(--border);\"><h2 class=\"text-xl font-bold\" style=\"color: var(--text-primary)\">Add Books to Collection</h2><button @click=\"$store.bookPicker.close()\" class=\"p-2 hover:opacity-80 rounded\" style=\"color: var(--text-primary)\">✕</button></div><!-- Filter Bar (same as bookshelf) --><div class=\"p-4 border-b\" style=\"border-color: var(--border);\"><div class=\"flex flex-wrap gap-4 items-center\"><!-- Search --><div class=\"flex-1 min-w-[200px]\"><input type=\"text\" name=\"search\" placeholder=\"Search books...\" class=\"w-full px-3 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\" hx-get=\"/api/media-items/filtered?show_checkbox=true&collection_id={ collection.ID }\" hx-target=\"#book-picker-grid\" hx-trigger=\"keyup changed delay:300ms\" hx-include=\"#book-picker-filters\"></div><!-- Author --><div class=\"flex-1 min-w-[150px]\"><input type=\"text\" name=\"author_filter\" placeholder=\"Author\" class=\"w-full px-3 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\" hx-get=\"/api/media-items/filtered?show_checkbox=true&collection_id={ collection.ID }\" hx-target=\"#book-picker-grid\" hx-trigger=\"change\" hx-include=\"#book-picker-filters\"></div><!-- Genre --><div class=\"flex-1 min-w-[150px]\"><input type=\"text\" name=\"genre_filter\" placeholder=\"Genre\" class=\"w-full px-3 py-2 border rounded-lg\" style=\"background-color: var(--bg-primary); color: var(--text-primary); border-color: var(--border);\" hx-get=\"/api/media-items/filtered?show_checkbox=true&collection_id={ collection.ID }\" hx-target=\"#book-picker-grid\" hx-trigger=\"change\" hx-include=\"#book-picker-filters\"></div><!-- Clear --><div><button @click=\"$store.bookPicker.clearFilters()\" class=\"px-4 py-2 rounded-lg border\" style=\"border-color: var(--border); color: var(--text-primary);\">✕ Clear</button></div></div><!-- Hidden form for HTMX --><!-- NOTE: class=\"hidden\" is acceptable here because form is never shown to user --><!-- HTMX uses it for parameter inclusion only --><form id=\"filter-form\" class=\"hidden\"><input type=\"hidden\" name=\"limit\" value=\"50\"> <input type=\"hidden\" name=\"offset\" value=\"0\"></form></div><!-- Books Grid with Multi-select --><!-- CRITICAL: HTMX swaps this div's content, but Alpine.store preserves selection state --><div id=\"book-picker-grid\" class=\"grid grid-cols-2 md:grid-cols-4 lg:grid-cols-6 gap-4 p-4 max-h-96 overflow-y-auto\"><!-- Books loaded via HTMX --></div><!-- Selected Count & Submit --><div class=\"p-4 border-t flex justify-between items-center\" style=\"border-color: var(--border);\"><div class=\"text-sm\" style=\"color: var(--text-secondary);\"><span x-text=\"$store.bookPicker.selectedCount\"></span> books selected</div><div class=\"flex gap-2\"><button @click=\"$store.bookPicker.close()\" class=\"px-4 py-2 rounded-lg border\" style=\"border-color: var(--border); color: var(--text-primary);\">Cancel</button> <button @click=\"$store.bookPicker.submit()\" class=\"px-4 py-2 rounded-lg font-medium\" style=\"background-color: var(--accent); color: var(--bg-primary);\">Add Selected Books</button></div></div></div></div></body><div id=\"collection-data\" data-id=\"{collection.ID}\" data-library-id=\"{ libraryID }\" style=\"display: none;\"></div></html>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}