refactor: AIDA -> modulare Zeiterfassung

- Alle AIDA-Referenzen durch generische Begriffe ersetzt
  (aida -> attendance im Code, "Zeiterfassung" im UI)
- DB-Spalten: last_aida_status -> last_attendance_status
- Settings: aida_csv_path -> attendance_csv_path
- REST API fuer Zeiterfassung auf Port 8081:
  POST /api/attendance/{personal_nr} mit {"status": "anwesend"}
  GET  /api/attendance - alle Status abfragen
- Automatische DB-Migration fuer bestehende Installationen
- CSV bleibt als Option, API als Echtzeit-Alternative

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

database.py

@@ -59,7 +59,7 @@ def init_db():
 
         CREATE TABLE IF NOT EXISTS state (
             user_azure_id TEXT PRIMARY KEY REFERENCES users(azure_id) ON DELETE CASCADE,
-            last_aida_status TEXT DEFAULT '',
+            last_attendance_status TEXT DEFAULT '',
             last_teams_status TEXT DEFAULT '',
             phone_active INTEGER DEFAULT 0,
             updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
@@ -70,7 +70,7 @@ def init_db():
             timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
             user_azure_id TEXT,
             user_name TEXT,
-            aida_status TEXT,
+            attendance_status TEXT,
             teams_status TEXT,
             wled_url TEXT,
             result TEXT
@@ -107,6 +107,27 @@ def init_db():
     except Exception:
         pass
 
+    # Migrate: rename aida columns to attendance
+    try:
+        conn.execute("ALTER TABLE state RENAME COLUMN last_aida_status TO last_attendance_status")
+    except Exception:
+        pass
+    try:
+        conn.execute("ALTER TABLE activity_log RENAME COLUMN aida_status TO attendance_status")
+    except Exception:
+        pass
+    # Migrate: rename aida settings keys
+    for old_key, new_key in [
+        ("aida_csv_path", "attendance_csv_path"),
+        ("aida_status_anwesend", "attendance_status_anwesend"),
+        ("aida_status_abwesend", "attendance_status_abwesend"),
+        ("aida_status_homeoffice", "attendance_status_homeoffice"),
+    ]:
+        old_val = conn.execute("SELECT value FROM settings WHERE key=?", (old_key,)).fetchone()
+        if old_val:
+            conn.execute("INSERT OR REPLACE INTO settings (key, value) VALUES (?, ?)", (new_key, old_val["value"]))
+            conn.execute("DELETE FROM settings WHERE key=?", (old_key,))
+
     defaults = {
         "azure_client_id": "",
         "azure_client_secret": "",
@@ -115,10 +136,10 @@ def init_db():
         "azure_scopes": "User.Read User.Read.All Presence.Read Presence.Read.All",
         "azure_auth_record": "",
         "poll_interval": "15",
-        "aida_csv_path": "",
-        "aida_status_anwesend": "~~1~~",
-        "aida_status_abwesend": "~~0~~",
-        "aida_status_homeoffice": "~~2~~",
+        "attendance_csv_path": "",
+        "attendance_status_anwesend": "~~1~~",
+        "attendance_status_abwesend": "~~0~~",
+        "attendance_status_homeoffice": "~~2~~",
     }
     for key, value in defaults.items():
         conn.execute(
@@ -179,14 +200,14 @@ def get_all_settings():
     return {row["key"]: row["value"] for row in rows}
 
 
-def log_activity(user_azure_id, user_name, aida_status, teams_status, wled_url, result):
+def log_activity(user_azure_id, user_name, attendance_status, teams_status, wled_url, result):
     from datetime import datetime
     conn = get_db()
     conn.execute(
         """INSERT INTO activity_log
-           (timestamp, user_azure_id, user_name, aida_status, teams_status, wled_url, result)
+           (timestamp, user_azure_id, user_name, attendance_status, teams_status, wled_url, result)
            VALUES (?, ?, ?, ?, ?, ?, ?)""",
-        (datetime.now().strftime("%Y-%m-%d %H:%M:%S"), user_azure_id, user_name, aida_status, teams_status, wled_url, result),
+        (datetime.now().strftime("%Y-%m-%d %H:%M:%S"), user_azure_id, user_name, attendance_status, teams_status, wled_url, result),
     )
     conn.execute(
         "DELETE FROM activity_log WHERE id NOT IN (SELECT id FROM activity_log ORDER BY id DESC LIMIT 500)"