[IMP] inventory: improve stock info and UI in product form

This improvement refines the product template form view to offer better stock
visibility and user control, particularly for users operating in multi-company
environments. The default buttons such as Update Quantity On Hand and Print
Labels are hidden to reduce UI clutter and avoid confusion for non-storable or
consumable products. A computed field is_multicompany has been added to restrict
direct editing of stock quantities when the user is linked to multiple companies
helping maintain data consistency.

Additionally, the form now displays the current available quantity alongside its
unit of measure with a clear Update button, making it easier for users to
quickly act on stock changes. The Forecasted button label has also been
clarified with an inline quantity display. Visual decorations on the
virtual_available field indicate when stock is low or negative, allowing users
to identify stock issues at a glance. A custom server action has been added to
open the product replenish wizard, providing a fast and user-friendly way to
restock products. Overall, these changes streamline the inventory management
workflow and enhance the clarity and usability of the product form.

task-4965097

Author: niyp-odoo

update_on_hand/__init__.py

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+from . import models

update_on_hand/__manifest__.py

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+{
+    'name': 'Update Quantity On Hand',
+    'version': '1.0',
+    'author': 'niyp',
+    'depends': ['stock'],
+    'data': [
+        'views/product_template_views.xml',
+    ],
+    'installable': True,
+    'license': 'LGPL-3',
+}

update_on_hand/models/__init__.py

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+from . import product_template

update_on_hand/models/product_template.py

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+from odoo import api, fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    is_multicompany = fields.Boolean(compute="_compute_is_multicompany")
+
+    @api.depends('company_id')
+    def _compute_is_multicompany(self):
+        for record in self:
+            user = self.env.user
+            record.is_multicompany = len(user.company_ids) > 1

update_on_hand/views/product_template_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="view_product_template_form_inherited" model="ir.ui.view">
+        <field name="name">product.template.form.custom.inherit</field>
+        <field name="model">product.template</field>
+        <field name="inherit_id" ref="product.product_template_only_form_view" />
+        <field name="arch" type="xml">
+
+            <xpath expr="//button[@name='action_update_quantity_on_hand']" position="attributes">
+                <attribute name="invisible">1</attribute>
+            </xpath>
+
+            <xpath expr="//button[@invisible='not show_on_hand_qty_status_button']"
+                position="attributes">
+                <attribute name="invisible">1</attribute>
+            </xpath>
+
+            <xpath expr="//field[@name='virtual_available']"
+                position='attributes'>
+                <attribute name='decoration-danger'>virtual_available &lt; 0</attribute>
+                <attribute name='decoration-primary'>virtual_available == 0</attribute>
+            </xpath>
+
+            <xpath
+                expr="//button[@name='action_product_tmpl_forecast_report']/div/span[hasclass('o_stat_value', 'd-flex', 'gap-1')]/field[@name='uom_name']"
+                position='replace'>
+                <span>Forecasted</span>
+            </xpath>
+
+            <xpath
+                expr="//button[@name='action_product_tmpl_forecast_report']/div/span[hasclass('o_stat_value', 'd-flex', 'gap-1')]"
+                position='before'>
+                <span class="o_stat_value d-flex gap-1">
+                    <field name="qty_available" nolabel="1" class="oe_inline" />
+                    <field name="uom_name" class="oe_inline" />
+                </span>
+            </xpath>
+
+            <xpath
+                expr="//button[@name='action_product_tmpl_forecast_report']/div/span[hasclass('o_stat_text')]"
+                position='attributes'>
+                <attribute name='invisible'>1</attribute>
+            </xpath>
+
+        </field>
+    </record>
+
+    <record id="product_template_form_view_inherit" model="ir.ui.view">
+        <field name="name">product.template.common.form.inherit</field>
+        <field name="model">product.template</field>
+        <field name="inherit_id" ref="product.product_template_form_view" />
+        <field name="arch" type="xml">
+
+            <xpath expr="//field[@name='product_tooltip']" position='attributes'>
+                <attribute name='invisible'>type == 'consu'</attribute>
+            </xpath>
+
+            <xpath expr="//field[@name='product_tooltip']" position="after">
+                <label for="qty_available" invisible='not is_storable'>Quantity On Hand</label>
+                <span class="d-flex gap-3">
+                    <field name="qty_available"
+                        readonly="is_multicompany"
+                        class="oe_inline"
+                        invisible='not is_storable'
+                    />
+                    <field name="uom_name" class="oe_inline" invisible='not is_storable' />
+                    <button type="action"
+                        name="%(stock.action_product_stock_view)d"
+                        class="oe_stat_button oe_inline opacity-0 opacity-100-hover"
+                        invisible='not is_storable'>
+                        Update
+                    </button>
+                </span>
+            </xpath>
+
+        </field>
+    </record>
+</odoo>