Initialize project

.gemini_instructions.md

@@ -0,0 +1,11 @@
+# Gemini Agent Instructions
+
+This project follows specific architectural and operational rules defined in `PROJECT_RULES.md`.
+
+**CRITICAL INSTRUCTION:**
+Before implementing any new features or modifying existing code, you MUST read and adhere to the guidelines in **`PROJECT_RULES.md`** located in the project root.
+
+Key highlights:
+1. **Client-Side First:** Logic should be implemented in the Frontend (Vue 3) whenever possible to ensure privacy and reduce server load.
+2. **Stateless Server:** The Backend (FastAPI) should remain stateless. Use `backend/temp_uploads` for temporary files and rely on the auto-cleanup scheduler.
+3. **UI/UX:** Use Global Navigation (GNB) instead of Sidebars (LNB).