chore: initial project scaffolding with AI rules and requirements

dev_docs/ARCHIVE_LOGS.md

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+# Archive Logs
+This file contains the mandatory historical log of code, architecture, and logic modifications.
+Each entry MUST be formatted chronologically.
+
+## Log Format
+### [YYYY-MM-DD HH:MM] Feature/Modification Title
+**Purpose:** Why this was modified.
+**Modified Files:**
+- `path/to/file`
+
+**Test Results:** (if applicable)

dev_docs/PLAN_HISTORY.md

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+# Plan History
+This file tracks all completed tasks and phases moved from `PLAN.md`.
+
+## Archive
+*(Moved completed components here to keep PLAN.md focused on active work)*

dev_docs/UI_FIDELITY_SPEC.md

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+# UI Fidelity Specification
+
+This document details the mandatory visual and structural specifications for UI components (headers, banners, cards, buttons) in the unified PWA interface.
+
+## 1. General Principles
+- Use TailwindCSS (or equivalent local vanilla CSS framework established).
+- No emojis; strictly Bootstrap Icons.
+- Standard spacing, consistent font weight (Inter or Roboto).
+- Responsive: Viewport scaling for both Desktop dashboard and Mobile full-screen scanning modes.
+
+## 2. Specific Components
+*(To be populated as components are developed)*