Initial commit

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

backend/migrations/001_create_exercises.down.sql

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+DROP TABLE IF EXISTS exercises;

backend/migrations/001_create_exercises.up.sql

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+CREATE TABLE exercises (
+    id           INTEGER PRIMARY KEY AUTOINCREMENT,
+    name         TEXT NOT NULL CHECK(length(name) >= 1 AND length(name) <= 100),
+    description  TEXT DEFAULT '',
+    muscle_group TEXT NOT NULL CHECK(muscle_group IN (
+        'brust', 'ruecken', 'schultern', 'bizeps', 'trizeps',
+        'beine', 'bauch', 'ganzkoerper', 'sonstiges'
+    )),
+    weight_step_kg REAL NOT NULL DEFAULT 2.5 CHECK(weight_step_kg > 0),
+    created_at   DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at   DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    deleted_at   DATETIME
+);
+
+CREATE INDEX idx_exercises_muscle_group ON exercises(muscle_group) WHERE deleted_at IS NULL;
+CREATE INDEX idx_exercises_deleted_at ON exercises(deleted_at);

backend/migrations/002_create_training_sets.down.sql

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+DROP TABLE IF EXISTS set_exercises;
+DROP TABLE IF EXISTS training_sets;

backend/migrations/002_create_training_sets.up.sql

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+CREATE TABLE training_sets (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    name       TEXT NOT NULL CHECK(length(name) >= 1 AND length(name) <= 100),
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    deleted_at DATETIME
+);
+
+CREATE TABLE set_exercises (
+    set_id      INTEGER NOT NULL REFERENCES training_sets(id) ON DELETE CASCADE,
+    exercise_id INTEGER NOT NULL REFERENCES exercises(id),
+    position    INTEGER NOT NULL CHECK(position >= 0),
+    PRIMARY KEY (set_id, exercise_id)
+);
+
+CREATE INDEX idx_set_exercises_set_id ON set_exercises(set_id);

backend/migrations/003_create_sessions.down.sql

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+DROP TABLE IF EXISTS session_logs;
+DROP TABLE IF EXISTS sessions;

backend/migrations/003_create_sessions.up.sql

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+CREATE TABLE sessions (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    set_id     INTEGER NOT NULL REFERENCES training_sets(id),
+    started_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    ended_at   DATETIME,
+    note       TEXT DEFAULT ''
+);
+
+CREATE TABLE session_logs (
+    id            INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id    INTEGER NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
+    exercise_id   INTEGER NOT NULL REFERENCES exercises(id),
+    exercise_name TEXT NOT NULL,
+    set_number    INTEGER NOT NULL CHECK(set_number >= 1),
+    weight_kg     REAL NOT NULL CHECK(weight_kg >= 0 AND weight_kg <= 999),
+    reps          INTEGER NOT NULL CHECK(reps >= 0 AND reps <= 999),
+    note          TEXT DEFAULT '',
+    logged_at     DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(session_id, exercise_id, set_number)
+);
+
+CREATE INDEX idx_sessions_set_id ON sessions(set_id);
+CREATE INDEX idx_sessions_started_at ON sessions(started_at);
+CREATE INDEX idx_session_logs_session_id ON session_logs(session_id);
+CREATE INDEX idx_session_logs_exercise_id ON session_logs(exercise_id);

backend/migrations/embed.go

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+package migrations
+
+import "embed"
+
+// FS enthält die eingebetteten SQL-Migrations-Dateien.
+//
+//go:embed *.sql
+var FS embed.FS