feat: add dlv_fleetflow_base — FleetFlow Settings foundation addon

dlv_fleetflow_base/CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2026-06-14
+
+### Added
+- Initial release.
+- FleetFlow entry in the Odoo Settings sidebar (Settings → FleetFlow).
+- Empty notebook foundation for feature addon tabs.
+- Owned by `dlv_fleetflow_base`, never uninstalled directly.

dlv_fleetflow_base/README.md

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+# dlv_fleetflow_base
+
+## Overview
+
+`dlv_fleetflow_base` is the foundation addon for all FleetFlow-branded addons.
+It permanently owns the **FleetFlow** entry in the Odoo Settings sidebar
+(Settings → FleetFlow) and provides an empty settings block that feature addons
+extend. It contains no models and no business logic — its only job is to give
+every `dlv_fleetflow_*` addon a single, shared place to live in Settings.
+
+## How it works
+
+This addon inherits the standard configuration form
+(`base_setup.res_config_settings_view_form`) and injects a FleetFlow
+`app_settings_block` carrying `data-key="dlv_fleetflow_base"` and an empty
+`<notebook/>`. It also creates the **FleetFlow** menu entry and the action that
+opens Settings directly on that block.
+
+Feature addons (`dlv_fleetflow_*`) never create their own Settings entry.
+Instead, each one adds a tab by inheriting the same base configuration form and
+targeting the shared notebook with an xpath:
+
+```
+//div[@data-key='dlv_fleetflow_base']//notebook
+```
+
+Because every feature addon depends on `dlv_fleetflow_base`, its view is loaded
+first, so the notebook exists when the feature addon's xpath runs. The result is
+one FleetFlow settings page with one tab per installed feature addon.
+
+## Adding a new FleetFlow addon
+
+1. Add `dlv_fleetflow_base` to your addon's `depends`.
+2. Inherit the base configuration form and add a `<page>` to the shared
+   notebook:
+
+```xml
+<record id="my_addon_config_settings_view_form" model="ir.ui.view">
+    <field name="name">res.config.settings.view.form.inherit.my.addon</field>
+    <field name="model">res.config.settings</field>
+    <field name="inherit_id" ref="base_setup.res_config_settings_view_form"/>
+    <field name="arch" type="xml">
+        <xpath expr="//div[@data-key='dlv_fleetflow_base']//notebook" position="inside">
+            <page string="My Addon">
+                <!-- your settings content here -->
+            </page>
+        </xpath>
+    </field>
+</record>
+```
+
+3. That's it — your tab appears under Settings → FleetFlow alongside the others.
+
+## Dependencies
+
+- `base`
+- `base_setup`
+
+## Installation
+
+Install `dlv_fleetflow_base` **first**, before any other `dlv_fleetflow_*`
+addon. It is a permanent dependency: do **not** uninstall it while any FleetFlow
+feature addon is still active, or those addons will lose their Settings tab and
+fail to load their configuration views.

dlv_fleetflow_base/__init__.py

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+# -*- coding: utf-8 -*-

dlv_fleetflow_base/__manifest__.py

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+# -*- coding: utf-8 -*-
+{
+    "name": "FleetFlow Base",
+    "summary": "Foundation for all FleetFlow addons — owns the Settings menu entry",
+    "author": "bv Domus La Vila",
+    "website": "https://domuslavila.eu",
+    "category": "Technical",
+    "version": "16.0.1.0.0",
+    "license": "LGPL-3",
+    "depends": ["base", "base_setup"],
+    "data": [
+        "views/res_config_settings_views.xml",
+        "views/menus.xml",
+    ],
+    "installable": True,
+    "application": False,
+    "auto_install": False,
+}

dlv_fleetflow_base/views/menus.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="fleetflow_action_config_settings" model="ir.actions.act_window">
+        <field name="name">FleetFlow</field>
+        <field name="res_model">res.config.settings</field>
+        <field name="view_mode">form</field>
+        <field name="target">inline</field>
+        <field name="context">{'module': 'dlv_fleetflow_base'}</field>
+    </record>
+
+    <menuitem id="fleetflow_menu_config_settings"
+              name="FleetFlow"
+              parent="base_setup.menu_all_settings"
+              sequence="70"
+              action="fleetflow_action_config_settings"/>
+
+</odoo>

dlv_fleetflow_base/views/res_config_settings_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="fleetflow_config_settings_view_form" model="ir.ui.view">
+        <field name="name">res.config.settings.view.form.inherit.fleetflow</field>
+        <field name="model">res.config.settings</field>
+        <field name="inherit_id" ref="base_setup.res_config_settings_view_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//div[hasclass('settings')]" position="inside">
+                <div class="app_settings_block" data-string="FleetFlow" string="FleetFlow"
+                     data-key="dlv_fleetflow_base" groups="base.group_system">
+                    <h2>FleetFlow</h2>
+                    <notebook/>
+                </div>
+            </xpath>
+        </field>
+    </record>
+
+</odoo>