Refactor database handling to require PostgreSQL connection, removing fallback to JSON. Implement error handling for database unavailability in key files. Update .env.example to reflect mandatory DATABASE_URL for local development. Remove Firebase configuration and related code from the project.

scripts/schema.sql

@@ -0,0 +1,70 @@
+-- FlixCooks relational recipe schema (PostgreSQL)
+
+CREATE TABLE IF NOT EXISTS recipes (
+    slug VARCHAR(255) PRIMARY KEY,
+    hero TEXT NOT NULL DEFAULT '',
+    prep_time INTEGER NOT NULL DEFAULT 0,
+    cook_time INTEGER NOT NULL DEFAULT 0,
+    total_time INTEGER NOT NULL DEFAULT 0,
+    servings INTEGER NOT NULL DEFAULT 2,
+    featured BOOLEAN NOT NULL DEFAULT FALSE,
+    coming_soon BOOLEAN NOT NULL DEFAULT FALSE,
+    calories INTEGER NOT NULL DEFAULT 0,
+    protein INTEGER NOT NULL DEFAULT 0,
+    carbs INTEGER NOT NULL DEFAULT 0,
+    fat INTEGER NOT NULL DEFAULT 0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS recipe_translations (
+    recipe_slug VARCHAR(255) NOT NULL REFERENCES recipes(slug) ON DELETE CASCADE,
+    lang CHAR(2) NOT NULL CHECK (lang IN ('en', 'de')),
+    title TEXT NOT NULL DEFAULT '',
+    description TEXT NOT NULL DEFAULT '',
+    category TEXT NOT NULL DEFAULT '',
+    difficulty TEXT NOT NULL DEFAULT '',
+    PRIMARY KEY (recipe_slug, lang)
+);
+
+CREATE TABLE IF NOT EXISTS recipe_tags (
+    id SERIAL PRIMARY KEY,
+    recipe_slug VARCHAR(255) NOT NULL REFERENCES recipes(slug) ON DELETE CASCADE,
+    lang CHAR(2) NOT NULL CHECK (lang IN ('en', 'de')),
+    tag TEXT NOT NULL,
+    sort_order INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX IF NOT EXISTS idx_recipe_tags_slug_lang ON recipe_tags (recipe_slug, lang);
+
+CREATE TABLE IF NOT EXISTS recipe_ingredients (
+    id SERIAL PRIMARY KEY,
+    recipe_slug VARCHAR(255) NOT NULL REFERENCES recipes(slug) ON DELETE CASCADE,
+    lang CHAR(2) NOT NULL CHECK (lang IN ('en', 'de')),
+    content TEXT NOT NULL,
+    sort_order INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX IF NOT EXISTS idx_recipe_ingredients_slug_lang ON recipe_ingredients (recipe_slug, lang);
+
+CREATE TABLE IF NOT EXISTS recipe_utensils (
+    id SERIAL PRIMARY KEY,
+    recipe_slug VARCHAR(255) NOT NULL REFERENCES recipes(slug) ON DELETE CASCADE,
+    lang CHAR(2) NOT NULL CHECK (lang IN ('en', 'de')),
+    content TEXT NOT NULL,
+    sort_order INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX IF NOT EXISTS idx_recipe_utensils_slug_lang ON recipe_utensils (recipe_slug, lang);
+
+CREATE TABLE IF NOT EXISTS recipe_steps (
+    id SERIAL PRIMARY KEY,
+    recipe_slug VARCHAR(255) NOT NULL REFERENCES recipes(slug) ON DELETE CASCADE,
+    lang CHAR(2) NOT NULL CHECK (lang IN ('en', 'de')),
+    content TEXT NOT NULL DEFAULT '',
+    video_url TEXT NOT NULL DEFAULT '',
+    timer_minutes INTEGER,
+    sort_order INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX IF NOT EXISTS idx_recipe_steps_slug_lang ON recipe_steps (recipe_slug, lang);