Initial commit: smartrun MVP

Garmin run classification and progression tracker. Go backend (MCP
client to mcp-garmin, SQLite store, deterministic rule engine, REST
API) and React/TS frontend (Dashboard, Review Queue, Workout Kinds).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/internal/store/migrations/0001_init.sql

@@ -0,0 +1,109 @@
+CREATE TABLE activities (
+    id                         INTEGER PRIMARY KEY AUTOINCREMENT,
+    garmin_activity_id         INTEGER NOT NULL UNIQUE,
+    activity_name              TEXT NOT NULL DEFAULT '',
+    activity_type              TEXT NOT NULL,
+    start_time_utc             TEXT NOT NULL,
+    begin_timestamp_ms         INTEGER NOT NULL,
+    duration_seconds           REAL NOT NULL,
+    distance_meters            REAL NOT NULL,
+    avg_hr                     REAL,
+    max_hr                     REAL,
+    avg_speed_mps              REAL,
+    max_speed_mps              REAL,
+    elevation_gain_m           REAL,
+    elevation_loss_m           REAL,
+    calories                   REAL,
+    lap_count                  INTEGER NOT NULL DEFAULT 0,
+    aerobic_training_effect    REAL,
+    anaerobic_training_effect  REAL,
+    training_effect_label      TEXT NOT NULL DEFAULT '',
+    vo2max_value               REAL,
+    hr_time_in_zone_1          REAL,
+    hr_time_in_zone_2          REAL,
+    hr_time_in_zone_3          REAL,
+    hr_time_in_zone_4          REAL,
+    hr_time_in_zone_5          REAL,
+    raw_json                   TEXT NOT NULL,
+    details_fetched_at         TEXT,
+    details_raw_json           TEXT,
+    splits_fetched_at          TEXT,
+    created_at                 TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at                 TEXT NOT NULL DEFAULT (datetime('now'))
+);
+CREATE INDEX idx_activities_start_time ON activities(start_time_utc);
+CREATE INDEX idx_activities_activity_type ON activities(activity_type);
+
+CREATE TABLE laps (
+    id                     INTEGER PRIMARY KEY AUTOINCREMENT,
+    activity_id            INTEGER NOT NULL REFERENCES activities(id) ON DELETE CASCADE,
+    lap_index              INTEGER NOT NULL,
+    start_time_utc         TEXT NOT NULL,
+    duration_seconds       REAL NOT NULL,
+    distance_meters        REAL NOT NULL,
+    avg_hr                 REAL,
+    max_hr                 REAL,
+    avg_speed_mps          REAL,
+    max_speed_mps          REAL,
+    elevation_gain_m       REAL,
+    elevation_loss_m       REAL,
+    intensity_type         TEXT NOT NULL DEFAULT '',
+    hr_drift_bpm_per_min   REAL,
+    hr_recovery_bpm_per_min REAL,
+    raw_json               TEXT NOT NULL,
+    UNIQUE(activity_id, lap_index)
+);
+
+CREATE TABLE activity_samples (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    activity_id     INTEGER NOT NULL REFERENCES activities(id) ON DELETE CASCADE,
+    elapsed_seconds REAL NOT NULL,
+    timestamp_ms    INTEGER NOT NULL,
+    heart_rate      REAL,
+    speed_mps       REAL,
+    distance_m      REAL,
+    elevation_m     REAL
+);
+CREATE INDEX idx_activity_samples_activity ON activity_samples(activity_id, elapsed_seconds);
+
+CREATE TABLE workout_kinds (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    name        TEXT NOT NULL UNIQUE,
+    description TEXT NOT NULL DEFAULT '',
+    color       TEXT NOT NULL DEFAULT '',
+    rule_json   TEXT NOT NULL,
+    priority    INTEGER NOT NULL DEFAULT 0,
+    is_active   INTEGER NOT NULL DEFAULT 1,
+    created_at  TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at  TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE kind_assignments (
+    id                   INTEGER PRIMARY KEY AUTOINCREMENT,
+    activity_id          INTEGER NOT NULL REFERENCES activities(id) ON DELETE CASCADE,
+    workout_kind_id       INTEGER REFERENCES workout_kinds(id),
+    assignment_source    TEXT NOT NULL CHECK(assignment_source IN ('rule_engine','manual')),
+    status               TEXT NOT NULL CHECK(status IN ('assigned','needs_review')),
+    confidence           REAL,
+    candidate_kinds_json TEXT NOT NULL DEFAULT '[]',
+    created_at           TEXT NOT NULL DEFAULT (datetime('now'))
+);
+CREATE INDEX idx_kind_assignments_activity ON kind_assignments(activity_id);
+CREATE INDEX idx_kind_assignments_status ON kind_assignments(status);
+
+CREATE VIEW current_kind_assignment AS
+SELECT a.* FROM kind_assignments a
+JOIN (
+    SELECT activity_id, MAX(id) AS max_id
+    FROM kind_assignments GROUP BY activity_id
+) latest ON a.activity_id = latest.activity_id AND a.id = latest.max_id;
+
+CREATE TABLE sync_runs (
+    id                  INTEGER PRIMARY KEY AUTOINCREMENT,
+    kind                TEXT NOT NULL CHECK(kind IN ('backfill','incremental')),
+    started_at          TEXT NOT NULL,
+    finished_at         TEXT,
+    activities_fetched  INTEGER NOT NULL DEFAULT 0,
+    status              TEXT NOT NULL CHECK(status IN ('running','success','error')),
+    error_message       TEXT
+);