fix(slideshow): read globals from app_settings, not the missing setti…

[Luca-Timo]

…ngs table

slideshowSettings used settingsService.getSetting, which queries db('settings')

• a table that does not exist in this app (globals live in app_settings). Every GET /gallery/:slug/show/:token/session and /state therefore threw and returned 500 INTERNAL_ERROR once a valid token resolved. Switch to getAppSetting (utils/appSettings), which reads app_settings where the slideshow_watermark_* and branding_* values are actually written.

Description

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Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

• Unit tests pass (npm test)
• Manual testing completed
• Tested on Docker deployment
• Tested on production-like environment

Test Configuration:

• PicPeak Version:
• Node.js Version:
• Database: PostgreSQL / SQLite
• Browser:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published
• I have updated the CHANGELOG.md file

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Additional Notes:

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