feat: Portal, Email Inbound, Discuss + module improvements

- Portal: /my/* routes, signup, password reset, portal user support
- Email Inbound: IMAP polling (go-imap/v2), thread matching
- Discuss: mail.channel, long-polling bus, DM, unread count
- Cron: ir.cron runner (goroutine scheduler)
- Bank Import, CSV/Excel Import
- Automation (ir.actions.server)
- Fetchmail service
- HR Payroll model
- Various fixes across account, sale, stock, purchase, crm, hr, project

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

pkg/server/views.go

@@ -195,6 +195,12 @@ func generateDefaultView(modelName, viewType string) string {
 		return generateDefaultPivotView(m)
 	case "graph":
 		return generateDefaultGraphView(m)
+	case "calendar":
+		return generateDefaultCalendarView(m)
+	case "activity":
+		return generateDefaultActivityView(m)
+	case "dashboard":
+		return generateDefaultDashboardView(m)
 	default:
 		return fmt.Sprintf("<%s><field name=\"id\"/></%s>", viewType, viewType)
 	}
@@ -530,6 +536,161 @@ func generateDefaultGraphView(m *orm.Model) string {
 	return fmt.Sprintf("<graph>\n  %s\n</graph>", strings.Join(fields, "\n  "))
 }
 
+// generateDefaultCalendarView creates a calendar view with auto-detected date fields.
+// The OWL CalendarArchParser requires date_start; date_stop and color are optional.
+// Mirrors: odoo/addons/web/static/src/views/calendar/calendar_arch_parser.js
+func generateDefaultCalendarView(m *orm.Model) string {
+	// Auto-detect date_start field (priority order)
+	dateStart := ""
+	for _, candidate := range []string{"start", "date_start", "date_from", "date_order", "date_begin", "date"} {
+		if f := m.GetField(candidate); f != nil && (f.Type == orm.TypeDatetime || f.Type == orm.TypeDate) {
+			dateStart = candidate
+			break
+		}
+	}
+	if dateStart == "" {
+		// Fallback: find any datetime/date field
+		for _, name := range sortedFieldNames(m) {
+			f := m.GetField(name)
+			if f != nil && (f.Type == orm.TypeDatetime || f.Type == orm.TypeDate) && f.Name != "create_date" && f.Name != "write_date" {
+				dateStart = name
+				break
+			}
+		}
+	}
+	if dateStart == "" {
+		// No date field found — return minimal arch that won't crash
+		return `<calendar date_start="create_date"><field name="display_name"/></calendar>`
+	}
+
+	// Auto-detect date_stop field
+	dateStop := ""
+	for _, candidate := range []string{"stop", "date_stop", "date_to", "date_end"} {
+		if f := m.GetField(candidate); f != nil && (f.Type == orm.TypeDatetime || f.Type == orm.TypeDate) {
+			dateStop = candidate
+			break
+		}
+	}
+
+	// Auto-detect color field (M2O fields make good color discriminators)
+	colorField := ""
+	for _, candidate := range []string{"color", "user_id", "partner_id", "stage_id"} {
+		if f := m.GetField(candidate); f != nil {
+			colorField = candidate
+			break
+		}
+	}
+
+	// Auto-detect all_day field
+	allDay := ""
+	for _, candidate := range []string{"allday", "all_day"} {
+		if f := m.GetField(candidate); f != nil && f.Type == orm.TypeBoolean {
+			allDay = candidate
+			break
+		}
+	}
+
+	// Build attributes
+	attrs := fmt.Sprintf(`date_start="%s"`, dateStart)
+	if dateStop != "" {
+		attrs += fmt.Sprintf(` date_stop="%s"`, dateStop)
+	}
+	if colorField != "" {
+		attrs += fmt.Sprintf(` color="%s"`, colorField)
+	}
+	if allDay != "" {
+		attrs += fmt.Sprintf(` all_day="%s"`, allDay)
+	}
+
+	// Pick display fields for the calendar card
+	var fields []string
+	nameField := "display_name"
+	if f := m.GetField("name"); f != nil {
+		nameField = "name"
+	}
+	fields = append(fields, fmt.Sprintf(`  <field name="%s"/>`, nameField))
+
+	if f := m.GetField("partner_id"); f != nil {
+		fields = append(fields, `  <field name="partner_id" avatar_field="avatar_128"/>`)
+	}
+	if f := m.GetField("user_id"); f != nil && colorField != "user_id" {
+		fields = append(fields, `  <field name="user_id"/>`)
+	}
+
+	return fmt.Sprintf("<calendar %s mode=\"month\">\n%s\n</calendar>",
+		attrs, strings.Join(fields, "\n"))
+}
+
+// generateDefaultActivityView creates a minimal activity view.
+// Mirrors: odoo/addons/mail/static/src/views/web_activity/activity_arch_parser.js
+func generateDefaultActivityView(m *orm.Model) string {
+	nameField := "display_name"
+	if f := m.GetField("name"); f != nil {
+		nameField = "name"
+	}
+	return fmt.Sprintf(`<activity string="Activities">
+  <templates>
+    <div t-name="activity-box">
+      <field name="%s"/>
+    </div>
+  </templates>
+</activity>`, nameField)
+}
+
+// generateDefaultDashboardView creates a dashboard view with aggregate widgets.
+// Mirrors: odoo/addons/board/static/src/board_view.js
+func generateDefaultDashboardView(m *orm.Model) string {
+	var widgets []string
+
+	// Add aggregate widgets for numeric fields
+	for _, name := range sortedFieldNames(m) {
+		f := m.GetField(name)
+		if f == nil {
+			continue
+		}
+		if (f.Type == orm.TypeFloat || f.Type == orm.TypeInteger || f.Type == orm.TypeMonetary) &&
+			f.IsStored() && f.Name != "id" && f.Name != "sequence" &&
+			f.Name != "create_uid" && f.Name != "write_uid" && f.Name != "company_id" {
+			widgets = append(widgets, fmt.Sprintf(
+				`    <aggregate name="%s" field="%s" string="%s"/>`,
+				f.Name, f.Name, f.String))
+			if len(widgets) >= 6 {
+				break
+			}
+		}
+	}
+
+	// Add a graph for the first groupable dimension
+	var graphField string
+	for _, name := range sortedFieldNames(m) {
+		f := m.GetField(name)
+		if f != nil && f.IsStored() && (f.Type == orm.TypeMany2one || f.Type == orm.TypeSelection) {
+			graphField = name
+			break
+		}
+	}
+
+	var buf strings.Builder
+	buf.WriteString("<dashboard>\n")
+	if len(widgets) > 0 {
+		buf.WriteString("  <group>\n")
+		for _, w := range widgets {
+			buf.WriteString(w + "\n")
+		}
+		buf.WriteString("  </group>\n")
+	}
+	if graphField != "" {
+		buf.WriteString(fmt.Sprintf(`  <view type="graph">
+    <graph type="bar">
+      <field name="%s"/>
+    </graph>
+  </view>
+`, graphField))
+	}
+	buf.WriteString("</dashboard>")
+	return buf.String()
+}
+
 // sortedFieldNames returns field names in alphabetical order for deterministic output.
 func sortedFieldNames(m *orm.Model) []string {
 	fields := m.Fields()