Feature: Tagebuch Cover-Bild (Favorit-Funktion) für diary_media

- Migration: diary_media.is_cover (INTEGER DEFAULT 0)
- Upload: erstes Item eines Eintrags automatisch is_cover=1
- Neuer Endpoint: PATCH /diary/{id}/media/{mid}/cover
- GET-Endpoints geben is_cover + cover_url zurück
- Frontend: Stern-Button (⭐) in Gallery-Detail und Edit-Formular
- Timeline-Karte verwendet cover_url als Vorschaubild
- SW by-v212, APP_VER 186

backend/database.py

@@ -6,18 +6,27 @@ SQLite mit WAL-Modus (bewährt von akku-werkstatt).
 import sqlite3
 import os
 import logging
+import unicodedata
 from contextlib import contextmanager
 
 logger   = logging.getLogger(__name__)
 DB_PATH  = os.getenv("DB_PATH", "/data/banyaro.db")
 
 
+def _norm(s):
+    """Diakritika entfernen + lowercase — für akzentunabhängige Suche."""
+    if not s:
+        return ''
+    return unicodedata.normalize('NFKD', str(s)).encode('ascii', 'ignore').decode('ascii').lower()
+
+
 def get_connection() -> sqlite3.Connection:
     conn = sqlite3.connect(DB_PATH, check_same_thread=False)
     conn.row_factory = sqlite3.Row
     conn.execute("PRAGMA journal_mode=WAL")
     conn.execute("PRAGMA foreign_keys=ON")
     conn.execute("PRAGMA busy_timeout=5000")
+    conn.create_function('norm', 1, _norm)
     return conn
 
 
@@ -471,6 +480,8 @@ def _migrate(conn_factory):
         ("walks",   "anz_bewertungen",  "INTEGER DEFAULT 0"),
         ("sitters", "bewertung",        "REAL DEFAULT 0"),
         ("sitters", "anz_bewertungen",  "INTEGER DEFAULT 0"),
+        # Tagebuch-Medien: Cover-Bild markieren
+        ("diary_media", "is_cover", "INTEGER NOT NULL DEFAULT 0"),
     ]
     with conn_factory() as conn:
         for table, column, col_type in migrations:
@@ -774,6 +785,20 @@ def _migrate(conn_factory):
         """)
         logger.info("Migration: diary_media Tabelle bereit.")
 
+        # Gesundheit: mehrere Mediendateien pro Eintrag
+        conn.executescript("""
+            CREATE TABLE IF NOT EXISTS health_media (
+                id         INTEGER PRIMARY KEY AUTOINCREMENT,
+                health_id  INTEGER NOT NULL REFERENCES health(id) ON DELETE CASCADE,
+                url        TEXT    NOT NULL,
+                media_type TEXT    NOT NULL DEFAULT 'image',
+                sort_order INTEGER NOT NULL DEFAULT 0,
+                created_at TEXT    NOT NULL DEFAULT (datetime('now'))
+            );
+            CREATE INDEX IF NOT EXISTS idx_health_media_entry ON health_media(health_id, sort_order);
+        """)
+        logger.info("Migration: health_media Tabelle bereit.")
+
         # Walk-Einladungen (RSVP)
         conn.executescript("""
             CREATE TABLE IF NOT EXISTS walk_invitations (