Initial commit: Screen Leads app

Screen-capture lead tool: capture agent, Claude vision extractor with
pluggable site recipes (LinkedIn), canonical funnel model, SQLite storage,
FastAPI backend, dashboard, and setup/run scripts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ai/recipes/__init__.py

@@ -0,0 +1,25 @@
+"""Recipe registry. Register new site recipes here — nothing else changes."""
+from __future__ import annotations
+
+from typing import Optional
+
+from core.models import PageContext, PageMatch
+from .base import SiteRecipe
+from .linkedin import LinkedInRecipe
+
+REGISTRY: list[SiteRecipe] = [
+    LinkedInRecipe(),
+]
+
+
+def enabled_recipes() -> list[SiteRecipe]:
+    return [r for r in REGISTRY if r.enabled]
+
+
+def match(ctx: PageContext) -> Optional[tuple[SiteRecipe, PageMatch]]:
+    """Return the first enabled recipe that recognises the page context."""
+    for recipe in enabled_recipes():
+        m = recipe.matches(ctx)
+        if m is not None:
+            return recipe, m
+    return None