Refactor and enhance game management, user roles, and state handling

This commit introduces significant changes across the backend and frontend to improve game creation, joining, and member management. Key updates include adding a host role, structured handling of winners, and a New Game modal in the frontend. The refactor also simplifies join codes, improves persistence for user themes, and enhances overall user interaction with better UI feedback and logic.

backend/app/models.py

@@ -1,19 +1,30 @@
 import enum
 import uuid
-from sqlalchemy import String, Boolean, DateTime, ForeignKey, Integer, SmallInteger, UniqueConstraint
+from sqlalchemy import (
+    String,
+    Boolean,
+    DateTime,
+    ForeignKey,
+    Integer,
+    SmallInteger,
+    UniqueConstraint,
+)
 from sqlalchemy.orm import Mapped, mapped_column
 from sqlalchemy.sql import func
 from .db import Base
 
+
 class Role(str, enum.Enum):
     admin = "admin"
     user = "user"
 
+
 class Category(str, enum.Enum):
     suspect = "suspect"
     item = "item"
     location = "location"
 
+
 class User(Base):
     __tablename__ = "users"
     id: Mapped[str] = mapped_column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
@@ -21,40 +32,39 @@ class User(Base):
     password_hash: Mapped[str] = mapped_column(String)
     role: Mapped[str] = mapped_column(String, default=Role.user.value)
     disabled: Mapped[bool] = mapped_column(Boolean, default=False)
+    created_at: Mapped[str] = mapped_column(DateTime(timezone=True), server_default=func.now())
 
-    # UI preferences (persisted server-side)
+    # NEW: Theme im Userprofil (damit es auf anderen Geräten mitkommt)
     theme_key: Mapped[str] = mapped_column(String, default="default")
 
-    created_at: Mapped[str] = mapped_column(DateTime(timezone=True), server_default=func.now())
 
 class Game(Base):
     __tablename__ = "games"
     id: Mapped[str] = mapped_column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
 
-    # Creator/owner (for audit), membership controls access
-    owner_user_id: Mapped[str] = mapped_column(String, ForeignKey("users.id"), index=True)
+    # NEW: Host (nur Host darf Winner setzen)
+    host_user_id: Mapped[str] = mapped_column(String, ForeignKey("users.id"), index=True)
 
     name: Mapped[str] = mapped_column(String)
     seed: Mapped[int] = mapped_column(Integer)
+    created_at: Mapped[str] = mapped_column(DateTime(timezone=True), server_default=func.now())
 
-    # "Kahoot"-style join code
-    join_code: Mapped[str] = mapped_column(String, unique=True, index=True)
+    # NEW: Join-Code (Kahoot-Style)
+    code: Mapped[str] = mapped_column(String, unique=True, index=True)
 
-    # Winner (shared for the game)
+    # NEW: Winner (aus Users, nicht Freitext)
     winner_user_id: Mapped[str | None] = mapped_column(String, ForeignKey("users.id"), nullable=True)
 
-    created_at: Mapped[str] = mapped_column(DateTime(timezone=True), server_default=func.now())
 
 class GameMember(Base):
     __tablename__ = "game_members"
-    __table_args__ = (
-        UniqueConstraint("game_id", "user_id", name="uq_game_member"),
-    )
+    __table_args__ = (UniqueConstraint("game_id", "user_id", name="uq_game_member"),)
 
     id: Mapped[str] = mapped_column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
     game_id: Mapped[str] = mapped_column(String, ForeignKey("games.id"), index=True)
     user_id: Mapped[str] = mapped_column(String, ForeignKey("users.id"), index=True)
-    created_at: Mapped[str] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    joined_at: Mapped[str] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
 
 class Entry(Base):
     __tablename__ = "entries"
@@ -62,11 +72,13 @@ class Entry(Base):
     category: Mapped[str] = mapped_column(String, index=True)
     label: Mapped[str] = mapped_column(String)
 
+
 class SheetState(Base):
     __tablename__ = "sheet_state"
     __table_args__ = (
         UniqueConstraint("game_id", "owner_user_id", "entry_id", name="uq_sheet"),
     )
+
     id: Mapped[str] = mapped_column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
     game_id: Mapped[str] = mapped_column(String, ForeignKey("games.id"), index=True)
     owner_user_id: Mapped[str] = mapped_column(String, ForeignKey("users.id"), index=True)
@@ -75,6 +87,6 @@ class SheetState(Base):
     status: Mapped[int] = mapped_column(SmallInteger, default=0)  # 0 unknown, 1 crossed, 2 confirmed, 3 maybe
     note_tag: Mapped[str | None] = mapped_column(String, nullable=True)  # null | 'i' | 'm' | 's'
 
-    # Frontend "s.XX" chip selection (persisted)
-    chip_code: Mapped[str | None] = mapped_column(String, nullable=True)
+    # NEW: Chip persistieren (statt LocalStorage)
+    chip: Mapped[str | None] = mapped_column(String, nullable=True)