fix(search): preserve quoted exact matches

src/lib/Search.fns.ts

@@ -3,6 +3,7 @@
 import { createServerFn } from '@tanstack/react-start'
 import { z } from 'zod'
 import type { Result } from './Search'
+import { buildFtsSearchQuery, buildTitleFtsSearchQuery } from './SearchQuery'
 
 /** Search TIPs with FTS5, supporting exact number shortcuts and prefix matching. */
 export const query = createServerFn({ method: 'POST' })
@@ -34,15 +35,11 @@ export const query = createServerFn({ method: 'POST' })
         ] as Result[]
     }
 
-    // FTS5 query with prefix matching
-    const ftsQuery = trimmed
-      .split(/\s+/)
-      .filter((term) => term.length > 0)
-      .map((term) => term.replace(/"/g, '""') + '*')
-      .join(' ')
+    const ftsQuery = buildFtsSearchQuery(trimmed)
+    if (!ftsQuery) return [] as Result[]
 
     // Run two queries: title-scoped matches first, then general matches
-    const titleQuery = `title : ${ftsQuery}`
+    const titleQuery = buildTitleFtsSearchQuery(ftsQuery)
     const [titleRows, allRows] = await Promise.all([
       db
         .prepare(
@@ -78,8 +75,8 @@ export const query = createServerFn({ method: 'POST' })
 
     // Merge: title matches first, then remaining general matches
     const seen = new Set(titleRows.results.map((r) => r.number))
-    return [
-      ...titleRows.results,
-      ...allRows.results.filter((r) => !seen.has(r.number)),
-    ].slice(0, 20)
+    return [...titleRows.results, ...allRows.results.filter((r) => !seen.has(r.number))].slice(
+      0,
+      20,
+    )
   })

src/lib/SearchQuery.test.ts

@@ -0,0 +1,35 @@
+import assert from 'node:assert/strict'
+import { describe, test } from 'node:test'
+import { buildFtsSearchQuery, buildTitleFtsSearchQuery } from './SearchQuery'
+
+describe('buildFtsSearchQuery', () => {
+  test('keeps unquoted terms as prefix searches', () => {
+    assert.equal(buildFtsSearchQuery('bal'), '"bal"*')
+  })
+
+  test('treats quoted terms as exact phrase searches', () => {
+    assert.equal(buildFtsSearchQuery('"bal"'), '"bal"')
+  })
+
+  test('mixes prefix terms and exact phrases', () => {
+    assert.equal(buildFtsSearchQuery('bal "asset layer"'), '"bal"* "asset layer"')
+  })
+
+  test('treats an unfinished quote as an exact phrase', () => {
+    assert.equal(buildFtsSearchQuery('"bal'), '"bal"')
+  })
+
+  test('quotes punctuation so direct search text cannot break FTS syntax', () => {
+    assert.equal(buildFtsSearchQuery('foo/bar'), '"foo/bar"*')
+  })
+
+  test('ignores empty quoted phrases', () => {
+    assert.equal(buildFtsSearchQuery('""'), '')
+  })
+})
+
+describe('buildTitleFtsSearchQuery', () => {
+  test('scopes the whole search expression to the title column', () => {
+    assert.equal(buildTitleFtsSearchQuery('"foo"* "bar"*'), 'title : ("foo"* "bar"*)')
+  })
+})

src/lib/SearchQuery.ts

@@ -0,0 +1,58 @@
+type SearchTerm = {
+  text: string
+  exact: boolean
+}
+
+/** Build an FTS5 MATCH query from direct search-box input. */
+export function buildFtsSearchQuery(input: string): string {
+  return parseSearchTerms(input)
+    .map((term) => {
+      const phrase = quoteFtsPhrase(term.text)
+      return term.exact ? phrase : `${phrase}*`
+    })
+    .join(' ')
+}
+
+export function buildTitleFtsSearchQuery(ftsQuery: string): string {
+  return `title : (${ftsQuery})`
+}
+
+function parseSearchTerms(input: string): SearchTerm[] {
+  const terms: SearchTerm[] = []
+  let text = ''
+  let inQuote = false
+
+  function push(exact: boolean) {
+    const trimmed = text.trim()
+    if (trimmed) terms.push({ text: trimmed, exact })
+    text = ''
+  }
+
+  for (const char of input.trim()) {
+    if (inQuote) {
+      if (char === '"') {
+        push(true)
+        inQuote = false
+      } else {
+        text += char
+      }
+      continue
+    }
+
+    if (char === '"') {
+      push(false)
+      inQuote = true
+    } else if (/\s/.test(char)) {
+      push(false)
+    } else {
+      text += char
+    }
+  }
+
+  push(inQuote)
+  return terms
+}
+
+function quoteFtsPhrase(value: string): string {
+  return `"${value.replace(/"/g, '""')}"`
+}