feat(email): add consent-gated IMAP/SMTP email channel

nanobot/config/schema.py

@@ -38,6 +38,36 @@ class DiscordConfig(BaseModel):
     gateway_url: str = "wss://gateway.discord.gg/?v=10&encoding=json"
     intents: int = 37377  # GUILDS + GUILD_MESSAGES + DIRECT_MESSAGES + MESSAGE_CONTENT
 
+class EmailConfig(BaseModel):
+    """Email channel configuration (IMAP inbound + SMTP outbound)."""
+    enabled: bool = False
+    consent_granted: bool = False  # Explicit owner permission to access mailbox data
+
+    # IMAP (receive)
+    imap_host: str = ""
+    imap_port: int = 993
+    imap_username: str = ""
+    imap_password: str = ""
+    imap_mailbox: str = "INBOX"
+    imap_use_ssl: bool = True
+
+    # SMTP (send)
+    smtp_host: str = ""
+    smtp_port: int = 587
+    smtp_username: str = ""
+    smtp_password: str = ""
+    smtp_use_tls: bool = True
+    smtp_use_ssl: bool = False
+    from_address: str = ""
+
+    # Behavior
+    auto_reply_enabled: bool = True  # If false, inbound email is read but no automatic reply is sent
+    poll_interval_seconds: int = 30
+    mark_seen: bool = True
+    max_body_chars: int = 12000
+    subject_prefix: str = "Re: "
+    allow_from: list[str] = Field(default_factory=list)  # Allowed sender email addresses
+
 
 class ChannelsConfig(BaseModel):
     """Configuration for chat channels."""
@@ -45,6 +75,7 @@ class ChannelsConfig(BaseModel):
     telegram: TelegramConfig = Field(default_factory=TelegramConfig)
     discord: DiscordConfig = Field(default_factory=DiscordConfig)
     feishu: FeishuConfig = Field(default_factory=FeishuConfig)
+    email: EmailConfig = Field(default_factory=EmailConfig)
 
 
 class AgentDefaults(BaseModel):