feat: FASE 0 - Setup progetto TieMeasureFlow

Struttura monorepo completa con server FastAPI e client Flask:
- Server: FastAPI + SQLAlchemy 2.0 async + Alembic migrations
- Client: Flask + blueprints (auth, measure, maker, statistics)
- Database: docker-compose MySQL 8.0 + Alembic async config
- Config: pydantic-settings, TailwindCSS, Flask-Babel i18n
- Piano implementazione completo (18 sezioni, 1600 righe)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/blueprints/auth.py

@@ -0,0 +1,31 @@
+"""Authentication blueprint - login, logout, profile."""
+from flask import Blueprint, render_template, request, redirect, url_for, session, flash
+
+auth_bp = Blueprint("auth", __name__)
+
+
+@auth_bp.route("/login", methods=["GET", "POST"])
+def login():
+    """Login page."""
+    if request.method == "POST":
+        # TODO: Implement API call to server /api/auth/login
+        pass
+    return render_template("auth/login.html")
+
+
+@auth_bp.route("/logout")
+def logout():
+    """Logout - clear session."""
+    session.clear()
+    return redirect(url_for("auth.login"))
+
+
+@auth_bp.route("/profile", methods=["GET", "POST"])
+def profile():
+    """User profile - change display name, language, theme."""
+    if "user" not in session:
+        return redirect(url_for("auth.login"))
+    if request.method == "POST":
+        # TODO: Implement API call to server /api/auth/me PUT
+        pass
+    return render_template("auth/profile.html")