docs(readme): remove DB_README reference and link active project files

README.md

@@ -63,7 +63,7 @@ Supabase config is required at runtime/build time (no embedded fallback values).
 Use:
 
 - `.env/flutter_defines.json` (local, ignored by git)
-- `.env/flutter_defines.example.json` (tracked template)
+- [.env/flutter_defines.example.json](.env/flutter_defines.example.json) (tracked template)
 
 Expected shape:
 
@@ -108,7 +108,7 @@ flutter run
 
 ### Run / Debug (`launch.json`)
 
-Use **Run and Debug** with:
+Use **Run and Debug** with your local launch config.
 
 - `Flutter (Supabase Local - Debug)`
 - `Flutter (Supabase Local - Profile)`
@@ -126,6 +126,8 @@ Use **Terminal → Run Task**:
 - `Flutter Build App Bundle (Release)`
 - `Flutter Build iOS IPA (Release)`
 
+Task definition file: [.vscode/tasks.json](.vscode/tasks.json)
+
 ## Project Structure (high level)
 
 - `lib/screens/` UI screens and flows
@@ -173,7 +175,7 @@ Use **Terminal → Run Task**:
 
 ## Contributing
 
-See `CONTRIBUTING.md` for branching strategy, commit message rules, and PR guidelines.
+See [CONTRIBUTING.md](CONTRIBUTING.md) for branching strategy, commit message rules, and PR guidelines.
 
 ## Security Notes
 
@@ -181,16 +183,16 @@ See `CONTRIBUTING.md` for branching strategy, commit message rules, and PR guide
 - Sensitive local config files are git-ignored.
 - User-facing errors are sanitized and shown via global overlays.
 
-For reporting vulnerabilities, see `SECURITY.md`.
+For reporting vulnerabilities, see [SECURITY.md](SECURITY.md).
 
 ## License
 
 This project is licensed under the MIT License.
-See `LICENSE` for details.
+See [LICENSE](LICENSE) for details.
 
 ## Reference
 
-- Contributor guidelines: `CONTRIBUTING.md`
-- Security policy: `SECURITY.md`
-- Database and backend notes: `DB_README.md`
+- Contributor guidelines: [CONTRIBUTING.md](CONTRIBUTING.md)
+- Security policy: [SECURITY.md](SECURITY.md)
+- DB schema export query pack: [db/export_schema.sql](db/export_schema.sql)