docs/ci: Maintenance-Updates (README, Workflows, Aufräumen)

- README auf kompaktes englisches Profil gekürzt (DevCenter-Abgrenzung)
- PORTIERUNGSPLAN.md und llms.txt entfernt (intern / gitignored)
- Stale- und Welcome-Workflows auf aktuelle Action-Versionen gehoben

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Lukas Geiger

.github/workflows/stale.yml

@@ -13,7 +13,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v10
+      - uses: actions/stale@v9
         with:
           stale-issue-message: >
             This issue has been automatically marked as stale because it has not had

.github/workflows/welcome.yml

@@ -14,18 +14,18 @@ jobs:
   welcome:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/first-interaction@v3
+      - uses: actions/first-interaction@v1
         with:
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
-          issue_message: |
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: |
             Welcome! 👋 Thanks for opening your first issue in this repository.
 
             We'll review it as soon as possible. In the meantime:
             - Check if there's a similar issue already open
             - Add as much detail as possible (steps to reproduce, expected behavior, environment)
 
             If you'd like to contribute a fix, PRs are always welcome!
-          pr_message: |
+          pr-message: |
             Welcome! 👋 Thanks for your first pull request in this repository.
 
             A maintainer will review it soon. Please make sure:

PORTIERUNGSPLAN.md

@@ -1,61 +1,20 @@
 # 🚀 DevCenter
 
-**Local-first Python IDE and developer toolkit for Windows.** DevCenter combines a PySide6 code editor, static analyzer, PyInstaller build helper, license collector, file index and optional Claude/Anthropic assistant in one desktop suite.
+**Python Development Suite** - Eine integrierte Entwicklungsumgebung für den kompletten Python-Entwicklungszyklus
 
 ![Version](https://img.shields.io/badge/version-1.0.0-blue)
 ![Python](https://img.shields.io/badge/python-3.10+-green)
 ![License](https://img.shields.io/badge/license-GPL%20v3-blue)
 
-## Overview
-
-DevCenter is a local desktop development suite for Python projects that covers the practical workflow from first file to release checklist:
-
-**Write -> Analyze -> Test -> Build -> Publish**
-
-It is designed for developers who want a lightweight local IDE with built-in project analysis, EXE packaging support, privacy-aware settings, and export planning for a future read-only Web/PWA companion.
-
-This repository is **not** Azure DevCenter, Microsoft Dev Box, Moderne DevCenter or Devbox. It is the `dev-bricks/DevCenter` open-source Python desktop app.
-
-![DevCenter main window showing the local Python IDE dashboard](README/screenshots/main.png)
-
-## Why DevCenter
-
-- **Local-first workflow:** projects, indexes, settings and build artifacts stay on your machine by default.
-- **Python desktop focus:** PySide6 interface, syntax highlighting, project explorer, terminal output and settings persistence.
-- **Static analysis built in:** method/class detection, complexity checks, import analysis, TODO/FIXME detection and encoding repair helpers.
-- **Build and release helpers:** PyInstaller wrapper, icon conversion, third-party license collection, release notes and export planning.
-- **Optional AI assistant:** Claude/Anthropic integration is opt-in and should use local settings, keyring or environment variables.
-- **Companion-ready export plan:** `devcenter-workspace-v1.json` is planned for redacted project-status handoff to a static Web/PWA viewer.
-
-## Quick Start
-
-```bash
-git clone https://github.com/dev-bricks/DevCenter.git
-cd DevCenter
-pip install -r requirements.txt
-python main.py
-```
-
-Windows helpers:
-
-```batch
-START_DevCenter.bat
-build_exe.bat
-```
-
-## Keywords
-
-`Python IDE`, `PySide6 IDE`, `local-first developer tools`, `offline Python editor`, `PyInstaller GUI`, `static code analyzer`, `developer toolkit`, `Windows Python desktop app`, `AI-assisted coding`, `license collector`, `project export`, `PWA companion`.
-
-## Deutsch: Übersicht
+## 📋 Übersicht
 
 DevCenter ist eine All-in-One Desktop-IDE für Python-Projekte, die den kompletten Entwicklungszyklus unterstützt:
 
-**Code schreiben -> Analysieren -> Testen -> Kompilieren -> Veröffentlichen**
+**Code schreiben → Analysieren → Testen → Kompilieren → Veröffentlichen**
 
-DevCenter ist eine lokale Desktop-Anwendung und nicht mit Azure DevCenter, Microsoft Dev Box, Moderne DevCenter oder Devbox identisch.
+## Screenshot
 
-![DevCenter Hauptfenster mit lokalem Python-IDE-Dashboard](README/screenshots/main.png)
+![DevCenter Hauptfenster](README/screenshots/main.png)
 
 ### 🔧 Fusionierte Tools