Fix schema drift: fresh installs were broken

- Create heat_cycles table in init.js (breeding.js used it but nothing created it)
- Add litters columns the routes actually use (breeding_date, whelping_date, puppy_count)
- Add health_records columns used by puppy logs (record_date, description)
- Puppy log insert now also sets NOT NULL test_date
- Migration 002 no-ops on a fresh DB instead of crashing on missing dogs table
- init.js honors DB_PATH and creates the data dir, so migrations and the app
  always target the same file

Verified: full heat-cycle/litter/puppy-log CRUD passes against a virgin database.

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

server/db/init.js

@@ -2,8 +2,11 @@ const Database = require('better-sqlite3');
 const path = require('path');
 const fs = require('fs');
 
-const dbPath = path.join(__dirname, '../../data');
-const db = new Database(path.join(dbPath, 'breedr.db'));
+// Honor DB_PATH (used by Docker and the migration runner in index.js) so
+// migrations and the app always operate on the same file.
+const dbFile = process.env.DB_PATH || path.join(__dirname, '../../data/breedr.db');
+fs.mkdirSync(path.dirname(dbFile), { recursive: true });
+const db = new Database(dbFile);
 
 function getDatabase() {
   return db;
@@ -91,6 +94,9 @@ function initDatabase() {
       male_count      INTEGER DEFAULT 0,
       female_count    INTEGER DEFAULT 0,
       stillborn_count INTEGER DEFAULT 0,
+      breeding_date   TEXT,
+      whelping_date   TEXT,
+      puppy_count     INTEGER DEFAULT 0,
       notes           TEXT,
       created_at      TEXT DEFAULT (datetime('now')),
       updated_at      TEXT DEFAULT (datetime('now')),
@@ -100,6 +106,33 @@ function initDatabase() {
     )
   `);
 
+  // migrate: columns the litters routes use (routes/litters.js) that older
+  // schemas lack
+  const litterMigrations = [
+    ['breeding_date', 'TEXT'],
+    ['whelping_date', 'TEXT'],
+    ['puppy_count',   'INTEGER DEFAULT 0'],
+  ];
+  for (const [col, def] of litterMigrations) {
+    try { db.exec(`ALTER TABLE litters ADD COLUMN ${col} ${def}`); } catch (_) { /* already exists */ }
+  }
+
+  // ── Heat Cycles ───────────────────────────────────────────────────────────
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS heat_cycles (
+      id                   INTEGER PRIMARY KEY AUTOINCREMENT,
+      dog_id               INTEGER NOT NULL,
+      start_date           TEXT NOT NULL,
+      end_date             TEXT,
+      breeding_date        TEXT,
+      breeding_successful  INTEGER DEFAULT 0,
+      notes                TEXT,
+      created_at           TEXT DEFAULT (datetime('now')),
+      updated_at           TEXT DEFAULT (datetime('now')),
+      FOREIGN KEY (dog_id) REFERENCES dogs(id)
+    )
+  `);
+
   // ── Health Records (OFA-extended) ─────────────────────────────────────────
   db.exec(`
     CREATE TABLE IF NOT EXISTS health_records (
@@ -135,6 +168,8 @@ function initDatabase() {
     ['result',       'TEXT'],
     ['vet_name',     'TEXT'],
     ['next_due',     'TEXT'],
+    ['record_date',  'TEXT'],
+    ['description',  'TEXT'],
   ];
   for (const [col, def] of healthMigrations) {
     try { db.exec(`ALTER TABLE health_records ADD COLUMN ${col} ${def}`); } catch (_) { /* already exists */ }

server/db/migrations.js

@@ -52,6 +52,13 @@ class MigrationRunner {
     return columns.some(col => col.name === 'sire' || col.name === 'dam');
   }
 
+  // Check if a table exists (fresh DBs have none — migrations must no-op)
+  tableExists(name) {
+    return !!this.db.prepare(
+      "SELECT name FROM sqlite_master WHERE type='table' AND name = ?"
+    ).get(name);
+  }
+
   // Check if litter_id column exists
   hasLitterIdColumn() {
     const columns = this.db.prepare("PRAGMA table_info(dogs)").all();
@@ -187,7 +194,12 @@ class MigrationRunner {
   // Migration 2: Add litter_id column if missing
   migration002_addLitterIdColumn() {
     console.log('[Migration 002] Checking for litter_id column...');
-    
+
+    if (!this.tableExists('dogs')) {
+      console.log('[Migration 002] Fresh database (no dogs table yet), skipping — init will create it');
+      return;
+    }
+
     if (this.hasLitterIdColumn()) {
       console.log('[Migration 002] litter_id column already exists, skipping');
       return;