docs: add .claude-context project overview

.claude-context/00-overview.md

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+# LEGO Instructions Manager (LIM)
+
+Flask web app for organising LEGO instruction manuals — official sets and MOCs (My Own Creations).
+
+**Repository:** https://gitea.hideawaygaming.com.au/jessikitty/lego-instructions-manager
+
+## Architecture
+- Flask with modular `app/` package: separate `services/`, `routes/` (blueprints), models, templates
+- SQLAlchemy + SQLite (PostgreSQL planned for production); Bootstrap 5 front end
+- PDF/image instruction uploads; PyMuPDF for PDF thumbnails, Pillow for cover image optimisation
+- Brickset API for auto-populating set details
+- Auth with admin panel, user management, stats dashboard, role-based access
+- MOC numbering via `MOCNumberGenerator` — global sequence, `MOC-0001` format
+
+## Deployment
+- Windows host at `E:\LIM`, Python 3.14, served with waitress
+- Auto-start via `start_lim.bat` + Task Scheduler (`setup_startup.bat`)
+
+## Conventions
+- Flexible dependency ranges; minimums for Py 3.14: PyMuPDF ≥1.24.0, Pillow ≥11.0.0, SQLAlchemy ≥2.0.35
+- Quote version specifiers on Windows (`pip install "pkg>=x"`) — unquoted `>` creates stray files
+
+## Session Log
+- 2025-12-12 — Python 3.14 Compatibility and Windows Auto-Start — Raised dependency minimums, flexible ranges, Task Scheduler startup
+- 2025-12-15 — MOC Number Auto-Generation (Global Numbering) — MOC service/blueprint, global MOC-0001 numbering, auto-fill + validation
+- 2026-01-05 — LEGO-Themed Visual Refresh — Brand-styled base template, dashboard and home page
+
+---
+*Created by: Jess Rogerson (yelling commands at Claude.AI)*