feat: provider-strict configs, slot-based templates, broadcast targets, email bots, command templates

Major architectural improvements:
- Provider-type enforcement: configs validated against provider type at assignment
- TemplateConfig migrated to slot-based pattern (TemplateSlot child table)
- Broadcast targets: TargetReceiver child table for multi-receiver dispatch
- EmailBot: first-class email sender entity with SMTP config, test connection
- CommandTemplateConfig: generic slot-based command response templates
- Provider capability registry: dynamic slot/event/command definitions per provider
- CommandTracker play/pause button matches NotificationTracker style

packages/server/src/notify_bridge_server/database/models.py

@@ -6,7 +6,7 @@ from datetime import datetime, timezone
 from typing import Any
 from uuid import uuid4
 
-from sqlalchemy import UniqueConstraint
+from sqlalchemy import UniqueConstraint, Text
 from sqlmodel import JSON, Column, Field, SQLModel
 
 
@@ -53,6 +53,24 @@ class TelegramBot(SQLModel, table=True):
     created_at: datetime = Field(default_factory=_utcnow)
 
 
+class EmailBot(SQLModel, table=True):
+    """Email sender — SMTP connection for sending email notifications."""
+
+    __tablename__ = "email_bot"
+
+    id: int | None = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id")
+    name: str
+    icon: str = Field(default="")
+    email: str  # From address
+    smtp_host: str
+    smtp_port: int = Field(default=587)
+    smtp_username: str = Field(default="")
+    smtp_password: str = Field(default="")
+    smtp_use_tls: bool = Field(default=True)
+    created_at: datetime = Field(default_factory=_utcnow)
+
+
 class TelegramChat(SQLModel, table=True):
     __tablename__ = "telegram_chat"
 
@@ -124,7 +142,10 @@ class TrackingConfig(SQLModel, table=True):
 
 
 class TemplateConfig(SQLModel, table=True):
-    """Jinja2 message templates. Tied to a provider type."""
+    """Jinja2 message templates. Tied to a provider type.
+
+    Template content is stored in TemplateSlot child rows (one per slot).
+    """
 
     __tablename__ = "template_config"
 
@@ -135,32 +156,41 @@ class TemplateConfig(SQLModel, table=True):
     description: str = Field(default="")
     icon: str = Field(default="")
 
-    # Event-driven notification templates
-    message_assets_added: str = Field(default="")
-    message_assets_removed: str = Field(default="")
-    message_collection_renamed: str = Field(default="")
-    message_collection_deleted: str = Field(default="")
-    message_sharing_changed: str = Field(default="")
-
-    # Scheduled notification templates
-    periodic_summary_message: str = Field(default="")
-    scheduled_assets_message: str = Field(default="")
-    memory_mode_message: str = Field(default="")
-
     date_format: str = Field(default="%d.%m.%Y, %H:%M UTC")
     date_only_format: str = Field(default="%d.%m.%Y")
 
     created_at: datetime = Field(default_factory=_utcnow)
 
 
+class TemplateSlot(SQLModel, table=True):
+    """One Jinja2 template for a specific slot within a TemplateConfig.
+
+    Slot names are provider-specific (e.g. 'message_assets_added' for Immich).
+    """
+
+    __tablename__ = "template_slot"
+    __table_args__ = (
+        UniqueConstraint("config_id", "slot_name", name="uq_template_slot"),
+    )
+
+    id: int | None = Field(default=None, primary_key=True)
+    config_id: int = Field(foreign_key="template_config.id", index=True)
+    slot_name: str
+    template: str = Field(default="", sa_column=Column(Text, default=""))
+
+
 class NotificationTarget(SQLModel, table=True):
-    """Where to send notifications. Pure delivery endpoint."""
+    """Where to send notifications. Pure delivery endpoint.
+
+    Target-level config holds connection/display settings (e.g. bot_token,
+    disable_url_preview). Actual delivery endpoints live in TargetReceiver rows.
+    """
 
     __tablename__ = "notification_target"
 
     id: int | None = Field(default=None, primary_key=True)
     user_id: int = Field(foreign_key="user.id")
-    type: str  # "telegram" or "webhook"
+    type: str  # "telegram", "webhook", or "email"
     name: str
     icon: str = Field(default="")
     config: dict[str, Any] = Field(default_factory=dict, sa_column=Column(JSON))
@@ -168,6 +198,28 @@ class NotificationTarget(SQLModel, table=True):
     created_at: datetime = Field(default_factory=_utcnow)
 
 
+class TargetReceiver(SQLModel, table=True):
+    """One delivery endpoint within a NotificationTarget (broadcast support).
+
+    For Telegram: config = {"chat_id": "12345"}
+    For Webhook: config = {"url": "https://...", "headers": {...}}
+    For Email: config = {"email": "user@example.com", "name": "..."}
+    """
+
+    __tablename__ = "target_receiver"
+    __table_args__ = (
+        UniqueConstraint("target_id", "receiver_key", name="uq_target_receiver"),
+    )
+
+    id: int | None = Field(default=None, primary_key=True)
+    target_id: int = Field(foreign_key="notification_target.id", index=True)
+    name: str = Field(default="")
+    config: dict[str, Any] = Field(default_factory=dict, sa_column=Column(JSON))
+    receiver_key: str = Field(default="")  # dedup key (e.g. chat_id, url, email)
+    enabled: bool = Field(default=True)
+    created_at: datetime = Field(default_factory=_utcnow)
+
+
 class NotificationTracker(SQLModel, table=True):
     """Watches a provider's collections for changes."""
 
@@ -246,9 +298,43 @@ class CommandConfig(SQLModel, table=True):
     response_mode: str = Field(default="media")  # "media" or "text"
     default_count: int = Field(default=5)
     rate_limits: dict[str, Any] = Field(default_factory=dict, sa_column=Column(JSON))
+    command_template_config_id: int | None = Field(
+        default=None, foreign_key="command_template_config.id"
+    )
     created_at: datetime = Field(default_factory=_utcnow)
 
 
+class CommandTemplateConfig(SQLModel, table=True):
+    """Jinja2 templates for command responses. Provider-specific via slots."""
+
+    __tablename__ = "command_template_config"
+
+    id: int | None = Field(default=None, primary_key=True)
+    user_id: int = Field(default=0)  # 0 = system-owned
+    provider_type: str
+    name: str
+    description: str = Field(default="")
+    icon: str = Field(default="")
+    created_at: datetime = Field(default_factory=_utcnow)
+
+
+class CommandTemplateSlot(SQLModel, table=True):
+    """One Jinja2 template for a specific command response slot.
+
+    Slot names match command names (e.g. 'status', 'help', 'albums').
+    """
+
+    __tablename__ = "command_template_slot"
+    __table_args__ = (
+        UniqueConstraint("config_id", "slot_name", name="uq_command_template_slot"),
+    )
+
+    id: int | None = Field(default=None, primary_key=True)
+    config_id: int = Field(foreign_key="command_template_config.id", index=True)
+    slot_name: str
+    template: str = Field(default="", sa_column=Column(Text, default=""))
+
+
 class CommandTracker(SQLModel, table=True):
     """Links a provider to a command config for interactive bot commands."""