migrated all pawprint work

artery/veins/slack/core/auth.py

@@ -0,0 +1,37 @@
+"""
+Slack credentials authentication for Slack vein.
+"""
+
+from dataclasses import dataclass
+from fastapi import Header, HTTPException
+from .config import settings
+
+
+@dataclass
+class SlackCredentials:
+    token: str
+
+
+async def get_slack_credentials(
+    x_slack_token: str | None = Header(None),
+) -> SlackCredentials:
+    """
+    Dependency that extracts Slack token from headers or falls back to config.
+
+    - Header provided → per-request token (web demo)
+    - No header → use .env token (API/standalone)
+    """
+    # Use header if provided
+    if x_slack_token and x_slack_token.strip():
+        return SlackCredentials(token=x_slack_token.strip())
+
+    # Fall back to config (prefer bot token, then user token)
+    if settings.slack_bot_token:
+        return SlackCredentials(token=settings.slack_bot_token)
+    if settings.slack_user_token:
+        return SlackCredentials(token=settings.slack_user_token)
+
+    raise HTTPException(
+        status_code=401,
+        detail="Missing credentials: provide X-Slack-Token header, or configure in .env",
+    )