Backend improvements: views, fields_get, session, RPC stubs

- Improved auto-generated list/form/search views with priority fields,
  two-column form layout, statusbar widget, notebook for O2M fields
- Enhanced fields_get with currency_field, compute, related metadata
- Fixed session handling: handleSessionInfo/handleSessionCheck use real
  session from cookie instead of hardcoded values
- Added read_progress_bar and activity_format RPC stubs
- Improved bootstrap translations with lang_parameters
- Added "contacts" to session modules list

Server starts successfully: 14 modules, 93 models, 378 XML templates,
503 JS modules transpiled — all from local frontend/ directory.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/service/migrate.go

@@ -0,0 +1,95 @@
+// Package service — schema migration support.
+// Mirrors: odoo/modules/migration.py (safe subset)
+package service
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"odoo-go/pkg/orm"
+)
+
+// MigrateSchema compares registered model fields with existing database columns
+// and adds any missing columns. This is a safe, additive-only migration:
+// it does NOT remove columns, change types, or drop tables.
+//
+// Mirrors: odoo/modules/loading.py _auto_init() — the part that adds new
+// columns when a model gains a field after the initial CREATE TABLE.
+func MigrateSchema(ctx context.Context, pool *pgxpool.Pool) error {
+	tx, err := pool.Begin(ctx)
+	if err != nil {
+		return fmt.Errorf("migrate: begin: %w", err)
+	}
+	defer tx.Rollback(ctx)
+
+	added := 0
+	for _, m := range orm.Registry.Models() {
+		if m.IsAbstract() {
+			continue
+		}
+
+		// Check if the table exists at all
+		var tableExists bool
+		err := tx.QueryRow(ctx,
+			`SELECT EXISTS (
+				SELECT 1 FROM information_schema.tables
+				WHERE table_name = $1 AND table_schema = 'public'
+			)`, m.Table()).Scan(&tableExists)
+		if err != nil || !tableExists {
+			continue // Table doesn't exist yet; InitDatabase will create it
+		}
+
+		// Get existing columns for this table
+		existing := make(map[string]bool)
+		rows, err := tx.Query(ctx,
+			`SELECT column_name FROM information_schema.columns
+			 WHERE table_name = $1 AND table_schema = 'public'`,
+			m.Table())
+		if err != nil {
+			continue
+		}
+		for rows.Next() {
+			var col string
+			rows.Scan(&col)
+			existing[col] = true
+		}
+		rows.Close()
+
+		// Add missing columns
+		for _, f := range m.StoredFields() {
+			if f.Name == "id" {
+				continue
+			}
+			if existing[f.Column()] {
+				continue
+			}
+
+			sqlType := f.SQLType()
+			if sqlType == "" {
+				continue
+			}
+
+			alter := fmt.Sprintf(`ALTER TABLE %q ADD COLUMN %q %s`,
+				m.Table(), f.Column(), sqlType)
+			if _, err := tx.Exec(ctx, alter); err != nil {
+				log.Printf("migrate: warning: add column %s.%s: %v", m.Table(), f.Column(), err)
+			} else {
+				log.Printf("migrate: added column %s.%s (%s)", m.Table(), f.Column(), sqlType)
+				added++
+			}
+		}
+	}
+
+	if err := tx.Commit(ctx); err != nil {
+		return fmt.Errorf("migrate: commit: %w", err)
+	}
+	if added > 0 {
+		log.Printf("migrate: %d column(s) added", added)
+	} else {
+		log.Println("migrate: schema up to date")
+	}
+	return nil
+}