Bring all areas to 60%: modules, reporting, i18n, views, data

Business modules deepened:
- sale: tag_ids, invoice/delivery counts with computes
- stock: _action_confirm/_action_done on stock.move, quant update stub
- purchase: done state added
- hr: parent_id, address_home_id, no_of_recruitment
- project: user_id, date_start, kanban_state on tasks

Reporting framework (0% → 60%):
- ir.actions.report model registered
- /report/html/<name>/<ids> endpoint serves styled HTML reports
- Report-to-model mapping for invoice, sale, stock, purchase

i18n framework (0% → 60%):
- ir.translation model with src/value/lang/type fields
- handleTranslations loads from DB, returns per-module structure
- 140 German translations seeded (UI terms across all modules)
- res_lang seeded with en_US + de_DE

Views/UI improved:
- Stored form views: sale.order (with editable O2M lines), account.move
  (with Post/Cancel buttons), res.partner (with title)
- Stored list views: purchase.order, hr.employee, project.project

Demo data expanded:
- 5 products (templates + variants with codes)
- 3 HR departments, 3 employees
- 2 projects

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

addons/project/models/project.go

@@ -19,9 +19,12 @@ func initProjectProject() {
 		orm.Boolean("active", orm.FieldOpts{String: "Active", Default: true}),
 		orm.Integer("sequence", orm.FieldOpts{String: "Sequence", Default: 10}),
 		orm.Many2one("partner_id", "res.partner", orm.FieldOpts{String: "Customer"}),
+		orm.Many2one("user_id", "res.users", orm.FieldOpts{String: "Project Manager"}),
 		orm.Many2one("company_id", "res.company", orm.FieldOpts{
 			String: "Company", Required: true, Index: true,
 		}),
+		orm.Date("date_start", orm.FieldOpts{String: "Start Date"}),
+		orm.Date("date", orm.FieldOpts{String: "Expiration Date"}),
 		orm.Many2one("stage_id", "project.task.type", orm.FieldOpts{String: "Stage"}),
 		orm.Many2many("favorite_user_ids", "res.users", orm.FieldOpts{String: "Favorite Users"}),
 		orm.Integer("task_count", orm.FieldOpts{
@@ -60,6 +63,11 @@ func initProjectTask() {
 			{Value: "0", Label: "Normal"},
 			{Value: "1", Label: "Important"},
 		}, orm.FieldOpts{String: "Priority", Default: "0"}),
+		orm.Selection("kanban_state", []orm.SelectionItem{
+			{Value: "normal", Label: "In Progress"},
+			{Value: "done", Label: "Ready"},
+			{Value: "blocked", Label: "Blocked"},
+		}, orm.FieldOpts{String: "Kanban State", Default: "normal"}),
 		orm.Integer("color", orm.FieldOpts{String: "Color Index"}),
 		orm.Many2many("user_ids", "res.users", orm.FieldOpts{String: "Assignees"}),
 		orm.Date("date_deadline", orm.FieldOpts{String: "Deadline", Index: true}),