fix: Prioritize exact phrase matches and fix case-sensitive search

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

src/search/search-engine.ts

@@ -481,6 +481,15 @@ export class SearchEngine {
         query
       )
 
+      let bestMatch: SearchMatch | undefined
+      if (
+        matches.length > 0 &&
+        query.getBestStringForExcerpt() &&
+        matches[0].match.toLowerCase() === query.getBestStringForExcerpt()
+      ) {
+        bestMatch = matches.shift()
+      }
+
       const lowerCaseBasename = note.basename.toLowerCase()
       const titleMatchWord = foundWords.find(word =>
         lowerCaseBasename.includes(word.toLowerCase())
@@ -514,6 +523,10 @@ export class SearchEngine {
         }
       }
 
+      if (bestMatch) {
+        matches.unshift(bestMatch)
+      }
+
       logVerbose(`Matches for note "${note.path}"`, matches)
       const resultNote: ResultNote = {
         score: result.score,

src/tools/text-processing.ts

@@ -95,11 +95,16 @@ export class TextProcessor {
       query &&
       (query.query.text.length > 1 || query.getExactTerms().length > 0)
     ) {
-      const best = text.indexOf(query.getBestStringForExcerpt())
-      if (best > -1 && matches.find(m => m.offset === best)) {
+      const bestMatchStr = query.getBestStringForExcerpt()
+      const best = text.toLowerCase().indexOf(bestMatchStr)
+      if (best > -1) {
+        // We found the full query. We make it the first result, and remove any other match that it contains.
+        matches = matches.filter(
+          m => m.offset < best || m.offset >= best + bestMatchStr.length
+        )
         matches.unshift({
           offset: best,
-          match: query.getBestStringForExcerpt(),
+          match: originalText.substring(best, best + bestMatchStr.length),
         })
       }
     }