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backend/src/life_towers/migrations/001_initial.sql

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+-- Life Towers v4 initial schema.
+-- SQLite with WAL mode and foreign keys enabled at connection time.
+-- All timestamps are unix epoch seconds (INTEGER).
+
+PRAGMA journal_mode = WAL;
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE IF NOT EXISTS users (
+    id            TEXT PRIMARY KEY,
+    created_at    INTEGER NOT NULL,
+    last_seen_at  INTEGER NOT NULL
+) STRICT;
+
+CREATE TABLE IF NOT EXISTS pages (
+    id                          TEXT PRIMARY KEY,
+    user_id                     TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    position                    INTEGER NOT NULL,
+    name                        TEXT NOT NULL,
+    hide_create_tower_button    INTEGER NOT NULL DEFAULT 0 CHECK (hide_create_tower_button IN (0, 1)),
+    default_date_from           INTEGER,
+    default_date_to             INTEGER,
+    created_at                  INTEGER NOT NULL,
+    updated_at                  INTEGER NOT NULL
+) STRICT;
+CREATE INDEX IF NOT EXISTS idx_pages_user_position ON pages(user_id, position);
+
+CREATE TABLE IF NOT EXISTS towers (
+    id            TEXT PRIMARY KEY,
+    page_id       TEXT NOT NULL REFERENCES pages(id) ON DELETE CASCADE,
+    user_id       TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    position      INTEGER NOT NULL,
+    name          TEXT NOT NULL,
+    base_color_h  REAL NOT NULL CHECK (base_color_h BETWEEN 0 AND 1),
+    base_color_s  REAL NOT NULL CHECK (base_color_s BETWEEN 0 AND 1),
+    base_color_l  REAL NOT NULL CHECK (base_color_l BETWEEN 0 AND 1),
+    created_at    INTEGER NOT NULL,
+    updated_at    INTEGER NOT NULL
+) STRICT;
+CREATE INDEX IF NOT EXISTS idx_towers_page_position ON towers(page_id, position);
+CREATE INDEX IF NOT EXISTS idx_towers_user ON towers(user_id);
+
+CREATE TABLE IF NOT EXISTS blocks (
+    id            TEXT PRIMARY KEY,
+    tower_id      TEXT NOT NULL REFERENCES towers(id) ON DELETE CASCADE,
+    user_id       TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    position      INTEGER NOT NULL,
+    tag           TEXT NOT NULL DEFAULT '',
+    description   TEXT NOT NULL DEFAULT '',
+    is_done       INTEGER NOT NULL DEFAULT 0 CHECK (is_done IN (0, 1)),
+    created_at    INTEGER NOT NULL,
+    updated_at    INTEGER NOT NULL
+) STRICT;
+CREATE INDEX IF NOT EXISTS idx_blocks_tower_position ON blocks(tower_id, position);
+CREATE INDEX IF NOT EXISTS idx_blocks_user ON blocks(user_id);