ajout d'un paneau admin

app/models/admin_settings.py

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+"""Global application settings stored as key-value pairs in the database."""
+
+from app.extensions import db
+
+
+class AppSettings(db.Model):
+    """Key-value store for global application settings.
+
+    Stores toggles and configuration that admins control through the
+    admin panel, such as whether tryouts are open, season state, etc.
+    """
+
+    __tablename__ = 'app_settings'
+
+    key = db.Column(db.String(100), primary_key=True)
+    value = db.Column(db.Text, nullable=True)
+
+    # ------------------------------------------------------------------
+    # Well-known keys (documented here for discoverability)
+    # ------------------------------------------------------------------
+    # tryouts_open          – "true" / "false"  (default: "true")
+    # season_active         – "true" / "false"  (default: "false")
+    # season_name           – e.g. "Fall 2026"
+    # season_start          – ISO date string
+    # season_end            – ISO date string
+
+    @staticmethod
+    def get(key, default=None):
+        """Return the value for *key*, or *default* if not set."""
+        row = db.session.get(AppSettings, key)
+        return row.value if row is not None else default
+
+    @staticmethod
+    def set(key, value):
+        """Upsert a setting."""
+        row = db.session.get(AppSettings, key)
+        if row is None:
+            row = AppSettings(key=key, value=str(value) if value is not None else None)
+            db.session.add(row)
+        else:
+            row.value = str(value) if value is not None else None
+        db.session.commit()
+
+    @staticmethod
+    def get_bool(key, default=False):
+        """Return a boolean setting."""
+        val = AppSettings.get(key)
+        if val is None:
+            return default
+        return val.lower() in ('true', '1', 'yes', 'on')
+
+    @staticmethod
+    def set_bool(key, value):
+        """Store a boolean setting as 'true' / 'false'."""
+        AppSettings.set(key, 'true' if value else 'false')