feat(chapters): add ChapterList modal

components/chapters/ChapterList.tsx

@@ -0,0 +1,120 @@
+/**
+ * A modal listing an item's chapters. Each row shows the chapter name and its
+ * timestamp; the current chapter is highlighted. Tapping a row seeks to that
+ * chapter and closes the modal. Player-agnostic — the seek is injected.
+ */
+
+import { Ionicons } from "@expo/vector-icons";
+import type { ChapterInfo } from "@jellyfin/sdk/lib/generated-client/models";
+import { FlatList, Modal, Pressable, View } from "react-native";
+import { Text } from "@/components/common/Text";
+import {
+  chapterStartsMs,
+  currentChapterIndex,
+  formatChapterTime,
+} from "@/utils/chapters";
+
+interface ChapterListProps {
+  visible: boolean;
+  chapters: ChapterInfo[] | null | undefined;
+  /** Current playback position in milliseconds (to highlight the row). */
+  currentPositionMs: number;
+  /** Seek the player to this millisecond position. */
+  onSeek: (positionMs: number) => void;
+  onClose: () => void;
+}
+
+export function ChapterList({
+  visible,
+  chapters,
+  currentPositionMs,
+  onSeek,
+  onClose,
+}: ChapterListProps) {
+  const starts = chapterStartsMs(chapters);
+  const activeIndex = currentChapterIndex(currentPositionMs, chapters);
+  const list = chapters ?? [];
+
+  return (
+    <Modal
+      visible={visible}
+      transparent
+      animationType='slide'
+      onRequestClose={onClose}
+    >
+      <Pressable
+        onPress={onClose}
+        style={{
+          flex: 1,
+          justifyContent: "flex-end",
+          backgroundColor: "#0009",
+        }}
+      >
+        <Pressable
+          onPress={(e) => e.stopPropagation()}
+          style={{
+            backgroundColor: "#1a1a1a",
+            borderTopLeftRadius: 16,
+            borderTopRightRadius: 16,
+            maxHeight: "70%",
+            paddingBottom: 24,
+          }}
+        >
+          <View
+            style={{
+              flexDirection: "row",
+              justifyContent: "space-between",
+              alignItems: "center",
+              padding: 16,
+            }}
+          >
+            <Text style={{ color: "#fff", fontSize: 17, fontWeight: "700" }}>
+              Chapters
+            </Text>
+            <Pressable onPress={onClose} hitSlop={10}>
+              <Ionicons name='close' size={24} color='#fff' />
+            </Pressable>
+          </View>
+          <FlatList
+            data={list}
+            keyExtractor={(_, i) => String(i)}
+            renderItem={({ item, index }) => {
+              const positionMs = starts[index] ?? 0;
+              const isActive = index === activeIndex;
+              return (
+                <Pressable
+                  onPress={() => {
+                    onSeek(positionMs);
+                    onClose();
+                  }}
+                  style={{
+                    flexDirection: "row",
+                    justifyContent: "space-between",
+                    alignItems: "center",
+                    paddingHorizontal: 16,
+                    paddingVertical: 14,
+                    backgroundColor: isActive ? "#a855f733" : "transparent",
+                  }}
+                >
+                  <Text
+                    style={{
+                      color: isActive ? "#a855f7" : "#fff",
+                      fontSize: 15,
+                      flex: 1,
+                    }}
+                    numberOfLines={1}
+                  >
+                    {item.Name || `Chapter ${index + 1}`}
+                  </Text>
+                  <Text style={{ color: "#999", fontSize: 13, marginLeft: 12 }}>
+                    {formatChapterTime(positionMs)}
+                  </Text>
+                </Pressable>
+              );
+            }}
+          />
+        </Pressable>
+      </Pressable>
+    </Modal>
+  );
+}