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>

run.bat

@@ -0,0 +1,28 @@
+@echo off
+REM One-command runner for Screen Leads (Windows).
+cd /d "%~dp0"
+
+if not exist ".venv" (
+  echo Creating virtual environment (.venv)...
+  python -m venv .venv
+)
+call .venv\Scripts\activate
+
+if not exist ".venv\.installed" (
+  echo Installing dependencies...
+  pip install -q --upgrade pip
+  pip install -q -r requirements.txt
+  type nul > .venv\.installed
+)
+
+if "%ANTHROPIC_API_KEY%"=="" if not exist ".env" (
+  echo ANTHROPIC_API_KEY is not set and no .env file was found.
+  echo   set ANTHROPIC_API_KEY=sk-ant-...   ^(this terminal^)
+  echo   or copy .env.example to .env and edit it
+  exit /b 1
+)
+
+if "%SCREEN_LEADS_HOST%"=="" set SCREEN_LEADS_HOST=127.0.0.1
+if "%SCREEN_LEADS_PORT%"=="" set SCREEN_LEADS_PORT=8000
+echo Starting Screen Leads at http://%SCREEN_LEADS_HOST%:%SCREEN_LEADS_PORT%  (Ctrl-C to stop)
+python main.py