Add real WPM and honest adaptive timing

src/lib/reading.ts

@@ -9,15 +9,39 @@ export function getORPIndex(wordLength: number): number {
   return 4; // 14+ chars: 5th letter
 }
 
-export function getWordDelay(word: string, baseDelayMs: number): number {
-  let multiplier = 1;
-  multiplier += Math.sqrt(word.length) * 0.04;
-  if (/[.!?]$/.test(word)) {
-    multiplier = 2.5;
-  } else if (/[,;:]$/.test(word)) {
-    multiplier = 1.8;
+function stripTrailingClosers(s: string): string {
+  // Handle punctuation followed by quotes/brackets like `word."` or `word.)`.
+  return s.replace(/[)"'\]]+$/g, "");
+}
+
+export function getTimingMultiplier(text: string, adaptiveTiming: boolean): number {
+  if (!adaptiveTiming) return 1;
+
+  const tokens = text.trim().split(/\s+/).filter(Boolean);
+  if (tokens.length === 0) return 1;
+
+  // Length-based slowdown: use the longest token in the display chunk.
+  let maxLen = 0;
+  for (const t of tokens) maxLen = Math.max(maxLen, t.length);
+  let multiplier = 1 + Math.sqrt(maxLen) * 0.04;
+
+  // Punctuation-based pauses: based on the last token.
+  const last = stripTrailingClosers(tokens[tokens.length - 1]);
+  if (/[.!?]$/.test(last)) {
+    multiplier = Math.max(multiplier, 2.5);
+  } else if (/[,;:]$/.test(last)) {
+    multiplier = Math.max(multiplier, 1.8);
   }
-  return baseDelayMs * multiplier;
+
+  return multiplier;
+}
+
+export function getWordDelay(
+  text: string,
+  baseDelayMs: number,
+  adaptiveTiming: boolean,
+): number {
+  return baseDelayMs * getTimingMultiplier(text, adaptiveTiming);
 }
 
 export function formatReadingTime(minutes: number): string {