feat(company-explorer): Initial Web UI & Backend with Enrichment Flow

This commit introduces the foundational elements for the new "Company Explorer" web application, marking a significant step away from the legacy Google Sheets / CLI system.

Key changes include:
- Project Structure: A new  directory with separate  (FastAPI) and  (React/Vite) components.
- Data Persistence: Migration from Google Sheets to a local SQLite database () using SQLAlchemy.
- Core Utilities: Extraction and cleanup of essential helper functions (LLM wrappers, text utilities) into .
- Backend Services: , ,  for AI-powered analysis, and  logic.
- Frontend UI: Basic React application with company table, import wizard, and dynamic inspector sidebar.
- Docker Integration: Updated  and  for multi-stage builds and sideloading.
- Deployment & Access: Integrated into central Nginx proxy and dashboard, accessible via .

Lessons Learned & Fixed during development:
- Frontend Asset Loading: Addressed issues with Vite's  path and FastAPI's .
- TypeScript Configuration: Added  and .
- Database Schema Evolution: Solved  errors by forcing a new database file and correcting  override.
- Logging: Implemented robust file-based logging ().

This new foundation provides a powerful and maintainable platform for future B2B robotics lead generation.

company-explorer/backend/config.py

@@ -0,0 +1,63 @@
+import os
+import logging
+from typing import Optional
+
+# Versuche Pydantic zu nutzen, Fallback auf os.environ
+try:
+    from pydantic_settings import BaseSettings
+    
+    class Settings(BaseSettings):
+        # App Info
+        APP_NAME: str = "Company Explorer"
+        VERSION: str = "0.2.2"
+        DEBUG: bool = True
+        
+        # Database (Store in App dir for simplicity)
+        DATABASE_URL: str = "sqlite:////app/companies_v3_final.db"
+        
+        # API Keys
+        GEMINI_API_KEY: Optional[str] = None
+        OPENAI_API_KEY: Optional[str] = None
+        SERP_API_KEY: Optional[str] = None
+        
+        # Paths
+        LOG_DIR: str = "/app/logs_debug"
+
+        class Config:
+            env_file = ".env"
+
+    settings = Settings()
+
+except ImportError:
+    # Fallback wenn pydantic-settings nicht installiert ist
+    class Settings:
+        APP_NAME = "Company Explorer"
+        VERSION = "0.2.1"
+        DEBUG = True
+        DATABASE_URL = "sqlite:////app/logs_debug/companies_debug.db"
+        GEMINI_API_KEY = os.getenv("GEMINI_API_KEY")
+        OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
+        SERP_API_KEY = os.getenv("SERP_API_KEY")
+        LOG_DIR = "/app/logs_debug"
+    
+    settings = Settings()
+
+# Ensure Log Dir
+os.makedirs(settings.LOG_DIR, exist_ok=True)
+
+# API Key Loading Helper (from file if env missing)
+def load_api_key_from_file(filename: str) -> Optional[str]:
+    try:
+        if os.path.exists(filename):
+            with open(filename, 'r') as f:
+                return f.read().strip()
+    except Exception as e:
+        print(f"Could not load key from {filename}: {e}") # Print because logging might not be ready
+    return None
+
+# Auto-load keys if not in env
+if not settings.GEMINI_API_KEY:
+    settings.GEMINI_API_KEY = load_api_key_from_file("/app/gemini_api_key.txt")
+
+if not settings.SERP_API_KEY:
+    settings.SERP_API_KEY = load_api_key_from_file("/app/serpapikey.txt")