Do I need a database for a small business invoice system?

No. For under ~10k customers, a single customers.js file on Hostinger file storage (100GB) is enough. It's downloadable via File Manager, no phpMyAdmin. save.php (44 lines) handles POST {'{type, content}'} with allowlist. localStorage is fallback if fetch fails.

Why is selectable text in PDF important?

Customers need to copy the bank account BCA 5771 •• 465 without retyping. Screenshot PDFs (850KB, image) don't allow copy. Text-based jsPDF (45KB) does, and it's 19x smaller. Logo still embeds via canvas PNG conversion.

Can local AI really handle jsPDF and file save logic?

Yes, but batched per component. One-shot generation hallucinated pricelist and broke logo CORS. Batched prompting (form → preview → pdf → save.php) with human validation produced 919 lines that work on shared hosting.

Building a Self-Contained Invoice System Without a Database.

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