fix(search): extend snippet window to word boundary at trailing edge

scripts/smoke.mjs

@@ -11,7 +11,7 @@ import { resolve, dirname } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { Personalizer, collectThemes, normalizeTheme } from '../src/personalize.js';
 import { SearchIndex, tokenize, snippet } from '../src/search.js';
-import { asMovements, monthByNumber, movementOf, mirrorOf, currentMonth, neighbors } from '../src/journey.js';
+import { asMovements, monthByNumber, monthsOfMovement, movementOf, mirrorOf, currentMonth, neighbors } from '../src/journey.js';
 
 const root = resolve(dirname(fileURLToPath(import.meta.url)), '..');
 const { articles } = JSON.parse(
@@ -145,6 +145,16 @@ check('snippet falls back to the start of the text when nothing matches', () =>
   assert.ok(s.startsWith('Gratitude'));
 });
 
+check('snippet does not cut mid-word at the trailing window edge', () => {
+  // The half-window (30 chars for contextChars=60) ends inside a word without the fix.
+  const body = 'target ' + 'filler '.repeat(20);
+  const s = snippet({ body }, ['target'], { contextChars: 60 });
+  assert.ok(s.endsWith(' …'), 'long text should produce a trailing ellipsis');
+  const beforeMark = s.slice(0, s.lastIndexOf(' …'));
+  const lastWord = beforeMark.split(/\s+/).pop();
+  assert.equal(lastWord, 'filler');
+});
+
 check('search matches an author name', () => {
   const idx = new SearchIndex().build([
     { title: 'On stillness', themes: ['Silence'], author: 'Nirodbaran', summary: 'x', body: 'y' },
@@ -154,4 +164,15 @@ check('search matches an author name', () => {
   assert.ok(hits[0].matched.includes('nirodbaran'));
 });
 
+console.log('journey.js (more)');
+
+check("monthsOfMovement returns a movement's months in calendar order", () => {
+  const months = monthsOfMovement(arc, 'ground');
+  assert.deepEqual(months.map((m) => m.number), [1, 2, 3, 4, 5]);
+});
+
+check('mirrorOf returns null for months with no mirror partner', () => {
+  assert.equal(mirrorOf(arc, 6), null);
+});
+
 console.log(`\n${passed} checks passed.`);

src/search.js

@@ -128,7 +128,12 @@ export function snippet(article, terms = [], { contextChars = 120 } = {}) {
     }
     if (idx === -1) continue;
     const start = Math.max(0, idx - half);
-    const end = Math.min(text.length, idx + half);
+    let end = Math.min(text.length, idx + half);
+    // Avoid cutting mid-word at the trailing edge of the window.
+    if (end < text.length && /\S/.test(text[end])) {
+      const nextSpace = text.indexOf(' ', end);
+      end = nextSpace !== -1 ? nextSpace : text.length;
+    }
     let s = text.slice(start, end).trim();
     if (start > 0) s = `… ${s}`;
     if (end < text.length) s = `${s} …`;