[FIX] base, hr_timesheet: display negative float_time values

Before this commit, negative values in a float field interpreted as time
(i.e. unit_amount on analytic lines) were wrongly formatted

After this commit, not only we correct the hr_timesheet qweb templates
but we also correct the qweb widget to handle the case

OPW 1869986
closes #26024

addons/hr_timesheet/report/report_timesheet_templates.xml

@@ -44,7 +44,7 @@
                                                 <t t-if="l.task_id"><span t-field="l.task_id.name"/></t>
                                             </td>
                                             <td class="text-right">
-                                                <span t-esc="'%s:%02.0f' % tuple(int(round(x)) for x in divmod(l.unit_amount*60,60))"/>
+                                                <span t-field="l.unit_amount" t-options="{'widget': 'float_time'}"/>
                                             </td>
                                         </tr>
                                     </t>
@@ -53,7 +53,9 @@
                                         <td />
                                         <td t-if="show_task"/>
                                         <td class="text-right"><strong>Total</strong></td>
-                                        <td class="text-right"><strong t-esc="'%s:%02.0f' % tuple(int(round(x)) for x in divmod(sum(docs.mapped('unit_amount'))*60,60))"/></td>
+                                        <t t-set="total_value" t-value="sum(docs.mapped('unit_amount'))" />
+                                        <t t-set="sign" t-value="'-' if total_value &lt; 0 else ''"/>
+                                        <td class="text-right"><strong t-esc="sign + '%s:%02.0f' % tuple(int(round(x)) for x in divmod(abs(total_value)*60,60))"/></td>
                                     </tr>
                                 </tbody>
                             </table>

odoo/addons/base/ir/ir_qweb/fields.py

@@ -7,6 +7,7 @@ from odoo import api, fields, models, _
 from PIL import Image
 import babel
 from lxml import etree
+import math
 
 from odoo.tools import html_escape as escape, posix_to_ldml, safe_eval, float_utils, format_date, pycompat
 
@@ -367,8 +368,9 @@ class FloatTimeConverter(models.AbstractModel):
 
     @api.model
     def value_to_html(self, value, options):
-        hours, minutes = divmod(value * 60, 60)
+        sign = math.copysign(1.0, value)
-        return '%02d:%02d' % (hours, minutes)
+        hours, minutes = divmod(abs(value) * 60, 60)
+        return '%02d:%02d' % (sign * hours, minutes)
 
 
 class DurationConverter(models.AbstractModel):