Eliminate Python dependency: embed frontend assets in odoo-go

- Copy all OWL frontend assets (JS/CSS/XML/fonts/images) into frontend/
  directory (2925 files, 43MB) — no more runtime reads from Python Odoo
- Replace OdooAddonsPath config with FrontendDir pointing to local frontend/
- Rewire bundle.go, static.go, templates.go, webclient.go to read from
  frontend/ instead of external Python Odoo addons directory
- Auto-detect frontend/ and build/ dirs relative to binary in main.go
- Delete obsolete Python helper scripts (tools/*.py)

The Go server is now fully self-contained: single binary + frontend/ folder.

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

frontend/account/static/tests/x2many_buttons.test.js

@@ -0,0 +1,138 @@
+import { defineMailModels } from "@mail/../tests/mail_test_helpers";
+import { expect, test } from "@odoo/hoot";
+import {
+    contains,
+    defineModels,
+    fields,
+    mockService,
+    models,
+    mountView,
+    onRpc,
+} from "@web/../tests/web_test_helpers";
+
+class AccountMove extends models.Model {
+    _name = "account.move";
+
+    name = fields.Char();
+    duplicated_ref_ids = fields.Many2many({
+        string: "Duplicated Bills",
+        relation: "account.move",
+    });
+    ref = fields.Char({ string: "Bill Reference" });
+
+    _records = [
+        // for the sake of mocking data, we don't care about the consistency of duplicated refs across records
+        { id: 1, display_name: "Bill 1", duplicated_ref_ids: [2, 3], ref: "b1" },
+        { id: 2, display_name: "Bill 2", duplicated_ref_ids: [1], ref: "b2" },
+        { id: 3, display_name: "Bill 3", duplicated_ref_ids: [1], ref: "b3" },
+        { id: 4, display_name: "Bill 4", duplicated_ref_ids: [1, 2, 3], ref: "b4" },
+        { id: 5, display_name: "Bill 5", duplicated_ref_ids: [], ref: "b5" },
+        { id: 6, display_name: "Bill 6", duplicated_ref_ids: [1, 2, 3, 4, 5], ref: "b6" },
+    ];
+
+    _views = {
+        form: `
+            <form>
+                <field name="display_name"/>
+                <field name="ref"/>
+                <field name="duplicated_ref_ids" widget="x2many_buttons"/>
+            </form>
+        `,
+    };
+}
+
+defineModels([AccountMove]);
+defineMailModels();
+
+test("component rendering: less than 3 records on field", async () => {
+    expect.assertions(2);
+
+    await mountView({
+        resModel: "account.move",
+        resId: 1,
+        type: "form",
+    });
+    expect(".o_field_x2many_buttons").toHaveCount(1);
+    expect(".o_field_x2many_buttons button").toHaveCount(2);
+});
+
+test("component rendering: exactly 3 records on field", async () => {
+    expect.assertions(2);
+
+    await mountView({
+        resModel: "account.move",
+        resId: 4,
+        type: "form",
+    });
+    expect(".o_field_x2many_buttons").toHaveCount(1);
+    expect(".o_field_x2many_buttons button").toHaveCount(3);
+});
+
+test("component rendering: more than 3 records on field", async () => {
+    expect.assertions(3);
+
+    await mountView({
+        resModel: "account.move",
+        resId: 6,
+        type: "form",
+    });
+    expect(".o_field_x2many_buttons").toHaveCount(1);
+    expect(".o_field_x2many_buttons button").toHaveCount(4);
+    expect(".o_field_x2many_buttons button:eq(3)").toHaveText("... (View all)");
+});
+
+test("edit record and check if edits get discarded when click on one of the buttons and redirects to proper record", async () => {
+    onRpc("account.move", "action_open_business_doc", ({ args }) => {
+        expect.step("action_open_business_doc");
+        expect(args.length).toBe(1);
+        expect(args[0]).toBe(2);
+        return {
+            res_model: "account.move",
+            res_id: 2,
+            type: "ir.actions.act_window",
+            views: [[false, "form"]],
+        };
+    });
+    await mountView({
+        resModel: "account.move",
+        resId: 1,
+        type: "form",
+    });
+
+    await contains("[name='ref'] input").edit("new ref");
+    expect("[name='ref'] input").toHaveValue("new ref");
+    await contains(".o_field_x2many_buttons button").click();
+    expect("[name='ref'] input").toHaveValue("b1");
+    expect.verifySteps(["action_open_business_doc"]);
+});
+
+// test if clicking on last button redirects to records in list view
+test("redirect to list view and discards edits when clicking on last button with more than 3 records on field", async () => {
+    expect.assertions(3);
+    mockService("action", {
+        doAction(action) {
+            expect(action).toEqual({
+                domain: [["id", "in", [1, 2, 3, 4, 5]]],
+                name: "Duplicated Bills",
+                res_model: "account.move",
+                type: "ir.actions.act_window",
+                views: [
+                    [false, "list"],
+                    [false, "form"],
+                ],
+                context: {
+                    list_view_ref: "account.view_duplicated_moves_tree_js",
+                },
+            });
+        },
+    });
+    await mountView({
+        resModel: "account.move",
+        resId: 6,
+        type: "form",
+    });
+    await contains("[name='ref'] input").edit("new ref");
+    expect("[name='ref'] input").toHaveValue("new ref");
+    await contains(".o_field_x2many_buttons button:eq(3)").click();
+    expect("[name='ref'] input").toHaveValue("b6");
+});