Basic architecture

app/__init__.py

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+from flask import Flask
+from .routes.main import main_bp
+
+def create_app():
+    app = Flask(__name__, instance_relative_config=True)
+
+    # Charge la config par défaut
+    app.config.from_object("app.config.Config")
+
+    # Charge la config sensible (instance/config.py)
+    app.config.from_pyfile("config.py", silent=True)
+
+    # Enregistre les blueprints
+    app.register_blueprint(main_bp)
+
+    return app

app/config.py

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+class Config:
+    DEBUG = True
+    SECRET_KEY = "jaimelespainsauchocolat"

app/routes/main.py

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+from flask import Blueprint, render_template
+
+main_bp = Blueprint("main", __name__)
+
+@main_bp.route("/")
+def index():
+    return render_template("index.html", title="SnowField")

app/templates/base.html

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+<!DOCTYPE html>
+<html lang="fr">
+<head>
+    <meta charset="UTF-8">
+    <title>{% block title %}SnowField{% endblock %}</title>
+
+    <!-- Exemple CSS -->
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
+</head>
+
+<body>
+
+    <main>
+        {% block content %}
+        {% endblock %}
+    </main>
+
+    <footer>
+        <p>© 2026 SnowField</p>
+    </footer>
+
+</body>
+</html>

app/templates/index.html

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+{% extends "base.html" %}
+
+{% block title %}Accueil - SnowField{% endblock %}
+
+{% block content %}
+    <h2>Bienvenue sur SnowField</h2>
+    <p>Ceci est la page d'accueil.</p>
+{% endblock %}