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>

setup.bat

@@ -0,0 +1,41 @@
+@echo off
+REM One-time setup for Screen Leads (Windows):
+REM   1. create the virtual environment
+REM   2. install dependencies
+REM   3. prompt for environment variables and write .env
+setlocal enabledelayedexpansion
+cd /d "%~dp0"
+echo == Screen Leads setup ==
+
+if not exist ".venv" (
+  echo Creating virtual environment (.venv)...
+  python -m venv .venv
+) else (
+  echo Virtual environment already exists.
+)
+call .venv\Scripts\activate
+
+echo Installing dependencies...
+pip install -q --upgrade pip
+pip install -q -r requirements.txt
+type nul > .venv\.installed
+
+if exist ".env" (
+  echo .env already exists - leaving it untouched.
+  goto done
+)
+
+echo.
+echo Set up your environment variables (saved to .env):
+set /p API_KEY="  Anthropic API key (sk-ant-...): "
+set /p MODEL="  Model [claude-opus-4-8] (Enter to accept): "
+if "!MODEL!"=="" set MODEL=claude-opus-4-8
+> .env echo ANTHROPIC_API_KEY=!API_KEY!
+>> .env echo SCREEN_LEADS_MODEL=!MODEL!
+echo Wrote .env
+if "!API_KEY!"=="" echo   WARNING: no key entered - edit .env before running.
+
+:done
+echo.
+echo Setup complete. Start the app with: run.bat
+endlocal