# Description of Changes
Fix#6801, along with fixing policies on desktop, which would attempt to
download policy outputs from the local backend instead of the server,
where they actually live. I've changed the policies logic to maintain
the same backend for the file retrieval as it used for the policy
running, so when we support running policies locally, it should still
work correctly.
# Description of Changes
Changes
- Use 127.0.0.1 instead of localhost for the local backend. The bundled
backend starts on a random port and binds the IPv4 wildcard, but the
frontend health-checked http://localhost:{port}. On macOS (and some
Linux) localhost resolves to IPv6 ::1 first, so the connection is
refused and every backend-dependent tool shows "backend offline" even
though the backend started fine. Switched getBackendUrl() and the
health-check URL to the 127.0.0.1 loopback literal (already in the Tauri
HTTP capability allowlist, and what the OAuth loopback server already
uses). Client-side tools were unaffected, which matches the reports.
- Fail the desktop build when the bundled JRE is older than the app JAR.
The app JAR is compiled for Java 25, but the bundle could ship an older
runtime/jre (jlink:runtime short-circuits on an existing runtime, and
nothing checked its version), producing UnsupportedClassVersionError at
launch so the backend never starts. Added a jlink:verify task that reads
the jlink release file and fails the build if the bundled JRE major is
below REQUIRED_JAVA (25, kept in sync with build.gradle
modernJavaVersion). It runs after the runtime is staged - including the
short-circuit reuse path that lets a stale JRE slip through.
Cross-platform Node script, no new dependencies.
---
## Checklist
### General
- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings
### Documentation
- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)
### Translations (if applicable)
- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)
### UI Changes (if applicable)
- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)
### Testing (if applicable)
- [ ] I have run `task check` to verify linters, typechecks, and tests
pass
- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#7-testing)
for more details.
