UI styling improvements: dashboard headers and navigation

- Restore blue PageHeader on Dashboard (/app-components)
- Update homepage (/) with subtle header design without blue bar
- Add uniform PageHeader styling to application edit page
- Fix Rapporten link on homepage to point to /reports overview
- Improve header descriptions spacing for better readability

CLAUDE.md

@@ -1,8 +1,8 @@
-# CLAUDE.md - ZiRA Classificatie Tool
+# CLAUDE.md - CMDB Insight
 
 ## Project Overview
 
-**Project:** ZiRA Classificatie Tool (Zuyderland CMDB Editor)
+**Project:** CMDB Insight (Zuyderland CMDB Editor)
 **Organization:** Zuyderland Medisch Centrum - ICMT
 **Purpose:** Interactive tool for classifying ~500 application components into ZiRA (Ziekenhuis Referentie Architectuur) application functions with Jira Assets CMDB integration.
 
@@ -18,7 +18,7 @@ The project has a working implementation with:
 - SQLite database for classification history
 
 Key files:
-- `zira-classificatie-tool-specificatie.md` - Complete technical specification
+- `cmdb-insight-specificatie.md` - Complete technical specification
 - `zira-taxonomy.json` - ZiRA taxonomy with 90+ application functions across 10 domains
 - `management-parameters.json` - Reference data for dynamics, complexity, users, governance models
 
@@ -57,7 +57,7 @@ cd frontend && npm run build
 ## Project Structure
 
 ```
-zira-classificatie-tool/
+cmdb-insight/
 ├── package.json                  # Root workspace package
 ├── docker-compose.yml            # Docker development setup
 ├── .env.example                  # Environment template
@@ -271,9 +271,25 @@ SESSION_SECRET=your_secure_random_string
 
 | File | Purpose |
 |------|---------|
-| `zira-classificatie-tool-specificatie.md` | Complete technical specification |
+| `cmdb-insight-specificatie.md` | Complete technical specification |
 | `zira-taxonomy.json` | 90+ ZiRA application functions |
 | `management-parameters.json` | Dropdown options and reference data |
+| `docs/refactor-plan.md` | **Architecture refactoring plan (Phase 1: Analysis)** |
+
+## Architecture Refactoring
+
+**Status:** Phase 1 Complete - Analysis and Planning
+
+A comprehensive refactoring plan has been created to improve maintainability, reduce duplication, and establish clearer separation of concerns. See `docs/refactor-plan.md` for:
+
+- Current architecture map (files/folders/modules)
+- Pain points and duplication analysis
+- Target architecture (domain/infrastructure/services/api)
+- Migration steps in order
+- Explicit deletion list (files to remove later)
+- API payload contract and recursion insights
+
+**⚠️ Note:** Phase 1 is analysis only - no functional changes have been made yet.
 
 ## Language