feat(rsvp): split words option, faster countdown, and skip pages RSVP cant open (#3755)

* fix: use string-parsed year to avoid UTC/timezone boundary issues

* feat: Add option to split words in RSVP mode

* fix: change the checkbox to a toggle

* fix(rsvp): speed up countdown from 2.4s to 1.5s

* feat(rsvp): skip to next page when no readable text is found

* fix(rsvp): replace lookbehind regex with lookahead-only split in getHyphenParts

apps/readest-app/src/services/rsvp/utils.ts

@@ -167,6 +167,24 @@ export function segmentCJKText(text: string): string[] {
   return words.filter((w) => w.trim().length > 0);
 }
 
+/**
+ * Split a hyphenated word into display parts, keeping a trailing hyphen on
+ * all but the last part. Only splits on hyphens that are directly between two
+ * letters (letter-hyphen-letter), so tokens like "--", "-word", "word-", and
+ * "foo--bar" are returned unchanged.
+ *
+ * Examples:
+ *   "well-known"  → ["well-", "known"]
+ *   "a-b-c"       → ["a-", "b-", "c"]
+ *   "--"          → ["--"]
+ *   "hello"       → ["hello"]
+ */
+export function getHyphenParts(word: string): string[] {
+  if (!/[a-zA-Z]-[a-zA-Z]/.test(word)) return [word];
+  const parts = word.split(/-(?=[a-zA-Z])/);
+  return parts.map((part, i) => (i < parts.length - 1 ? part + '-' : part));
+}
+
 /**
  * Split text into words, handling both CJK and non-CJK text
  */