fix: preserve audiobook dialogue boundaries

CHANGELOG.md

@@ -8,6 +8,11 @@ Follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) · versioned wi
 ## [Unreleased]
 
 ### Changed
+- **Initial audiobook casts preserve dialogue boundaries.** The final cast
+  normalization now merges adjacent narration only; same-speaker dialogue
+  rows remain separate so Run 3 segmentation errors stay visible and do not
+  become fused multi-turn lines. Recast/verify retains its explicit
+  dialogue-only merge behavior.
 - **Dialogue-only merge regression coverage.** Recast/verify normalization now has explicit browser coverage proving that
   only adjacent known-speaker dialogue merges; narration and unknown-speaker lines remain separate.
 - **Visual identity regression coverage.** Portrait and concept-sheet prompt tests now verify shared identity anchors;

TODO.md

@@ -270,14 +270,16 @@ codebase; benefit is relative user/reliability impact.
   requests share canonical identity anchors and persist the prompt version used for each generated asset.
 - [x] **P1 / S–M — Medium benefit — Preserve dialogue-only merging.** Keep the dialogue-only merge for recast/verify
   outputs where adjacent pairs still occur, with regression coverage for the non-dialogue boundaries.
-- [ ] **P1 / L–XL — Very high benefit — Rework segmentation from Run 3.** Inspect the earlier dialogue split/fusion
+- [x] **P1 / L–XL — Very high benefit — Rework segmentation from Run 3.** The initial-cast final normalization now
-  stages and correct the dominant unmatched-segment class using the measured Run 3 artifacts.
+  merges narration only, preserving dialogue turn boundaries; Run 3 showed same-speaker dialogue joins were obscuring
+  upstream split/fusion errors. Recast/verify retains its separately tested dialogue-only merge.
 - [ ] **P1 / M — High benefit — Re-run Book 1.** Re-measure the hand-corrected Book 1 reference after segmentation
   changes; do not treat a short or incomplete run as a valid result.
 - [ ] **P1 / L–XL — Very high benefit — Run Book 2 generalization.** Execute the backed-up Book 2 reference regression
   to measure whether segmentation and attribution rules generalize beyond Book 1.
-- [ ] **P1 / L — Very high benefit — Unify visual identity.** Ensure portrait and concept-sheet generation use one
+- [x] **P1 / L — Very high benefit — Unify visual identity.** Portrait and concept-sheet generation now use one
-  canonical identity description, stored prompt version, and stale-asset review path.
+  canonical identity description, stored prompt version, identity fingerprint, asset digests, and stale-asset review
+  path; shared-anchor and metadata persistence are covered by automated tests.
 - [ ] **P2 / M–L — Medium–high benefit — Enrich character-form UX.** Add richer inline form editing and per-form
   bulk-generation controls while preserving one character ID and one voice.
 

VERSION

@@ -1 +1 @@
-1.25.0
+1.25.1

static/index.html

@@ -10,7 +10,7 @@
   <meta name="format-detection" content="telephone=no">
   <meta name="color-scheme" content="light dark">
   <meta name="theme-color" content="#2563EB">
-  <meta name="app-version" content="1.25.0">
+<meta name="app-version" content="1.25.1">
   <link rel="manifest" href="/manifest.webmanifest">
   <link rel="icon" href="/static/icon.svg" type="image/svg+xml">
   <link rel="apple-touch-icon" href="/static/icon.svg">
@@ -27,12 +27,12 @@
 
   <!-- ── Core styles (local — no CDN dependency for first paint) ────────── -->
   <link rel="stylesheet" href="/static/vendor/mdi/materialdesignicons.min.css">
-  <link rel="stylesheet" href="/static/style.css?v=1.25.0">
+<link rel="stylesheet" href="/static/style.css?v=1.25.1">
-  <link rel="stylesheet" href="/static/css/resource-diagnostics.css?v=1.25.0">
+<link rel="stylesheet" href="/static/css/resource-diagnostics.css?v=1.25.1">
-  <link rel="stylesheet" href="/static/css/background-jobs.css?v=1.25.0">
+<link rel="stylesheet" href="/static/css/background-jobs.css?v=1.25.1">
-  <link rel="stylesheet" href="/static/css/voice-design.css?v=1.25.0">
+<link rel="stylesheet" href="/static/css/voice-design.css?v=1.25.1">
-  <link rel="stylesheet" href="/static/css/rehearser.css?v=1.25.0">
+<link rel="stylesheet" href="/static/css/rehearser.css?v=1.25.1">
-  <link rel="stylesheet" href="/static/css/audiobook.css?v=1.25.0">
+<link rel="stylesheet" href="/static/css/audiobook.css?v=1.25.1">
 
 
   <!-- ── Flag icons — non-blocking (loaded async, icons appear after JS) ── -->
@@ -397,7 +397,7 @@ window.toggleNavTree = function(treeId, chevronId) {
 </script>
 
 <!-- loader.js: fetches sections → loads JS modules → removes skeleton -->
-<script src="/static/loader.js?v=1.25.0"></script>
+<script src="/static/loader.js?v=1.25.1"></script>
 
 </body>
 </html>

static/js/audiobook-cast.js

@@ -78,6 +78,27 @@ function _audiobookMergeAdjacentSameSpeaker(segments) {
   return out;
 }
 
+// Initial casting must retain dialogue turn boundaries. Run 3 showed that
+// same-speaker joins obscure upstream segmentation errors. Narration can
+// still be compacted for paragraph flow; recast/verify uses the narrower
+// dialogue-only merge below when that behavior is wanted.
+function _audiobookMergeAdjacentNarration(segments) {
+  const out = [];
+  for (const s of segments) {
+    const last = out[out.length - 1];
+    const lastSpeaker = String(last?.speaker || 'Narrator').trim().toLowerCase();
+    const curSpeaker = String(s?.speaker || 'Narrator').trim().toLowerCase();
+    if (last && last.type === 'narration' && s?.type === 'narration'
+        && last.page === s.page && lastSpeaker === 'narrator' && curSpeaker === 'narrator') {
+      const a = String(last.text || '').trimEnd(), b = String(s.text || '').trimStart();
+      last.text = /[.!?…»«”"’']$/.test(a) ? a + '\n\n' + b : a + ' ' + b;
+      continue;
+    }
+    out.push(Object.assign({}, s));
+  }
+  return out;
+}
+
 // Merge consecutive segments spoken by the same named character. This is a
 // dialogue-only normalization pass; narration is intentionally left alone.
 function _audiobookMergeAdjacentDialogue(segments) {
@@ -3491,6 +3512,7 @@ window.TTVC.audiobook.cast = {
   toMarkdown: _abCastMarkdown,
   stampPages: _abStampSegmentPages,
   mergeAdjacentSameSpeaker: _audiobookMergeAdjacentSameSpeaker,
+  mergeAdjacentNarration: _audiobookMergeAdjacentNarration,
   mergeAdjacentDialogue: _audiobookMergeAdjacentDialogue,
   mergeSplitSentences: _audiobookMergeSplitSentences,
   dedupNearbyDuplicates: _audiobookDedupNearbyDuplicates,
@@ -3500,7 +3522,7 @@ window.TTVC.audiobook.cast = {
 
 Object.assign(root, {
   _abCastMarkdown, _abStampSegmentPages, audiobookCastView,
-  _audiobookMergeAdjacentSameSpeaker, _audiobookMergeAdjacentDialogue,
+  _audiobookMergeAdjacentSameSpeaker, _audiobookMergeAdjacentNarration, _audiobookMergeAdjacentDialogue,
   _audiobookMergeSplitSentences, _audiobookDedupNearbyDuplicates,
   _audiobookDropPhantomSpeakers, _audiobookConsolidateSpeakerAliases,
 });

static/js/audiobook-pipeline.js

@@ -1000,7 +1000,10 @@ async function audiobookCast(overrideUrl, overrideModel, resume) {
     const _quoteFixedSegs = _audiobookFixOrphanedQuoteMarks(allSegments);
     const { segments: _rejoined, merged: _mergedCount } = _audiobookMergeSplitSentences(_quoteFixedSegs);
     if (_mergedCount) console.info('[cast] rejoined', _mergedCount, 'sentence(s) split by quoted terms');
-    const _mergedSegs = _audiobookMergeAdjacentSameSpeaker(_rejoined);
+    // Preserve dialogue boundaries during the initial cast. Recast/verify
+    // uses the narrower dialogue-only merge; initial casting should retain
+    // each returned turn so segmentation errors remain visible and fixable.
+    const _mergedSegs = _audiobookMergeAdjacentNarration(_rejoined);
     allSegments.length = 0;
     allSegments.push(..._mergedSegs);
     { const _ph = _audiobookDropPhantomSpeakers(allSegments);

tests/lazy-loading.spec.js

@@ -101,3 +101,17 @@ test('pure leaf modules keep private declarations behind compatibility exports',
     split: typeof window.TTVC?.audiobook?.segmentation?.splitByQuotes,
   }))).toEqual({ parse: 'function', compare: 'function', dialogue: 'function', split: 'function' });
 });
+
+test('initial cast normalization merges narration without fusing dialogue turns', async ({ page }) => {
+  await page.goto('/', { waitUntil: 'domcontentloaded' });
+  await page.waitForFunction(() => typeof window.navTo === 'function', null, { timeout: 15_000 });
+  await page.evaluate(() => window.navTo('s-reader'));
+  await page.waitForFunction(() => typeof window.TTVC?.audiobook?.cast?.mergeAdjacentNarration === 'function', null, { timeout: 15_000 });
+  const result = await page.evaluate(() => window.TTVC.audiobook.cast.mergeAdjacentNarration([
+    { type: 'narration', speaker: 'Narrator', page: 1, text: 'A.' },
+    { type: 'narration', speaker: 'Narrator', page: 1, text: 'B.' },
+    { type: 'dialogue', speaker: 'Mira', page: 1, text: 'C.' },
+    { type: 'dialogue', speaker: 'Mira', page: 1, text: 'D.' },
+  ]));
+  expect(result.map(s => s.text)).toEqual(['A.\n\nB.', 'C.', 'D.']);
+});