v3: Mission Control Self-Update + Guides-Copy + Button-Audit

- Neuer Self-Update-Button ("Mission Control aktualisieren"): POST /api/self-update
  macht git pull (Quelle) -> rsync nach Prod -> systemctl restart (NOPASSWD).
  Pfade aus config.py (SOURCE_DIR/PROD_DIR), nicht user-hartkodiert.
- "LLM-Engine aktualisieren" ehrlich (war MC, ist llama.cpp via MC_UPDATE_CMD).
- Guides: Kopier-Buttons fuer alle Configs + Codeblock (Copy-Paste-tauglich).
- Button-Audit: Funktionen/Labels in allen Panels geprueft, stimmig.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

config.py

@@ -29,6 +29,10 @@ UPDATE_CMD = os.environ.get("MC_UPDATE_CMD", "")
 DEFAULT_TTL = int(os.environ.get("MC_DEFAULT_TTL", "300"))
 TOKEN = os.environ.get("MC_TOKEN", "")  # leer = keine Auth (nur LAN!)
 
+# Self-Update ("Mission Control aktualisieren"): Quelle = git-Repo, Prod = laufende Installation.
+SOURCE_DIR = os.path.expanduser(os.environ.get("MC_SOURCE_DIR", "~/mission-control"))
+PROD_DIR = str(Path(__file__).resolve().parent)
+
 # Gemeinsame YAML-Instanz (preserve_quotes haelt Kommentare/Quotes in config.yaml).
 yaml = YAML()
 yaml.preserve_quotes = True