fix: extract shared isGeneratedNoteTitle, fix filename using default title

- Extract UUID_TITLE_RE, ISO_TITLE_RE, and generated-title detection into
  a shared utility at services/enhancer/title.ts.
- In getEnhancedNoteFilename (persister), skip the title when it is a
  generated placeholder ('Summary', UUID, ISO, or template_id) and fall
  back to template_id for the filename. This prevents all template-based
  notes from being saved as Summary.md before async title hydration.
- Remove duplicated regex constants and logic from enhancer/index.ts and
  header.tsx; both now import isGeneratedNoteTitle from the shared module.

Author: cursoragent

apps/desktop/src/services/enhancer/index.ts

@@ -3,6 +3,7 @@ import type { LanguageModel } from "ai";
 import { commands as analyticsCommands } from "@hypr/plugin-analytics";
 
 import { getEligibility } from "./eligibility";
+import { isGeneratedNoteTitle } from "./title";
 
 import type { Store as MainStore } from "~/store/tinybase/store/main";
 import { INDEXES } from "~/store/tinybase/store/main";
@@ -37,25 +38,11 @@ type EnhancerDeps = {
   getSelectedTemplateId: () => string | undefined;
 };
 
-const UUID_TITLE_RE =
-  /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
-const ISO_TITLE_RE = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}/;
-
 function shouldHydrateTemplateTitle(
   currentTitle: string | null | undefined,
   templateId: string,
 ) {
-  const title = currentTitle?.trim();
-  if (!title) {
-    return true;
-  }
-
-  return (
-    title === "Summary" ||
-    title === templateId ||
-    UUID_TITLE_RE.test(title) ||
-    ISO_TITLE_RE.test(title)
-  );
+  return isGeneratedNoteTitle(currentTitle, templateId);
 }
 
 let instance: EnhancerService | null = null;

apps/desktop/src/services/enhancer/title.ts

@@ -0,0 +1,20 @@
+const UUID_TITLE_RE =
+  /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+const ISO_TITLE_RE = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}/;
+
+export function isGeneratedNoteTitle(
+  title: string | null | undefined,
+  templateId?: string,
+): boolean {
+  const trimmed = title?.trim();
+  if (!trimmed) {
+    return true;
+  }
+
+  return (
+    trimmed === "Summary" ||
+    (!!templateId && trimmed === templateId) ||
+    UUID_TITLE_RE.test(trimmed) ||
+    ISO_TITLE_RE.test(trimmed)
+  );
+}

apps/desktop/src/session/components/note-input/header.tsx

@@ -37,6 +37,7 @@ import { useAITaskTask } from "~/ai/hooks";
 import { useLanguageModel, useLLMConnectionStatus } from "~/ai/hooks";
 import { extractPlainText } from "~/search/contexts/engine/utils";
 import { getEnhancerService } from "~/services/enhancer";
+import { isGeneratedNoteTitle } from "~/services/enhancer/title";
 import { useHasTranscript } from "~/session/components/shared";
 import { useEnsureDefaultSummary } from "~/session/hooks/useEnhancedNotes";
 import {
@@ -90,10 +91,6 @@ function getStoredNoteMarkdown(content: string | undefined) {
   return json2md(parseJsonContent(trimmed)).trim();
 }
 
-const UUID_TITLE_RE =
-  /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
-const ISO_TITLE_RE = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}/;
-
 function getEnhancedNoteTitle({
   rawTitle,
   templateTitle,
@@ -108,13 +105,7 @@ function getEnhancedNoteTitle({
     return templateTitle || "Summary";
   }
 
-  const isGeneratedTitle =
-    title === "Summary" ||
-    title === templateId ||
-    UUID_TITLE_RE.test(title) ||
-    ISO_TITLE_RE.test(title);
-
-  if (isGeneratedTitle && templateTitle) {
+  if (isGeneratedNoteTitle(title, templateId) && templateTitle) {
     return templateTitle;
   }
 

apps/desktop/src/store/tinybase/persister/session/save/note.ts

@@ -12,6 +12,7 @@ import {
   type TablesContent,
   type WriteOperation,
 } from "~/store/tinybase/persister/shared";
+import { isGeneratedNoteTitle } from "~/services/enhancer/title";
 import type { Store } from "~/store/tinybase/store/main";
 
 type DocumentItem = [ParsedDocument, string];
@@ -142,8 +143,11 @@ function getEnhancedNoteFilename(
   enhancedNote: ReturnType<typeof iterateTableRows<"enhanced_notes">>[number],
 ): string {
   if (enhancedNote.template_id) {
+    const title = enhancedNote.title as string | undefined;
+    const useTitle =
+      title && !isGeneratedNoteTitle(title, enhancedNote.template_id);
     const safeName = sanitizeFilename(
-      enhancedNote.title || enhancedNote.template_id,
+      useTitle ? title : enhancedNote.template_id,
     );
     return `${safeName}.md`;
   }