feat: support paragraph AND search and stabilize translation display

Author: reycn

server/document-search.test.mjs

@@ -4,7 +4,13 @@ import {searchSegments} from '../src/document-search.mjs';
 test('PDF search spans text runs, ignores layout whitespace, and keeps matching coordinates',()=>{
  const a={x:10,y:20,width:30,height:12},b={x:40,y:20,width:30,height:12};
  const segments=[{text:'Hello ',box:a},{text:'WORLD',box:b},{text:'hello world',box:a}];
- assert.deepEqual(searchSegments(segments,'hello world').map(m=>m.boxes),[[a,b],[a]]);
+ assert.deepEqual(searchSegments(segments,'helloworld').map(m=>m.boxes),[[a,b],[a]]);
  assert.equal(searchSegments([{text:'译 文Ａ',box:a}],'译文a').length,1);
  assert.deepEqual(searchSegments(segments,' '),[]);
+ const first={},second={};
+ const paragraphs=[{text:'2017: other words ',box:a,block:first},{text:'Miller',box:b,block:first},{text:'Miller only',box:a,block:second}];
+ assert.deepEqual(searchSegments(paragraphs,'Miller 2017').map(m=>m.boxes),[[a,b]]);
+ assert.equal(searchSegments(paragraphs,'2017 Miller Miller').length,1);
+ assert.equal(searchSegments([{text:'Miller',box:a,block:first},{text:'2017',box:b,block:second}],'Miller 2017').length,0);
+
 });