fix(fusion_plating_shopfloor): stop breadcrumb URL growth; embed racking panel in step row

Surface switches between the plant kanban and job workspace used
doAction({..., target: "current"}), which APPENDS to Odoo 19's
controller/breadcrumb stack -- so the /odoo/... URL grew one segment
per switch, and the tablet lock/unlock window.location.reload()
preserved the bloat, compounding it every lock cycle. Switched those
navigations to target: "main" (Odoo sets clearBreadcrumbs when
action.target === "main" -> _computeStackIndex returns 0 -> stack
resets to a single action). The genuine one-level drill-down
(onJumpToBlocker -> hold/NCR form) keeps target: "current" so
breadcrumb-back still works there.

Also embeds the multi-rack racking panel inside the Racking step row
(gated on step.area_kind == 'racking') instead of a job-level section,
tying it to the recipe's Racking step.

19.0.37.0.1 -> 19.0.37.0.3. Both changes live on entech.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_shopfloor/controllers/workspace_controller.py

@@ -75,6 +75,8 @@ class FpWorkspaceController(http.Controller):
                 'name': step.name or '',
                 'kind': step.kind or 'other',
                 'kind_label': dict(step._fields['kind'].selection).get(step.kind, ''),
+                # Drives the embedded rack-split panel inside this step's row.
+                'is_racking': step.area_kind == 'racking',
                 'state': step.state,
                 'assigned_user_id': step.assigned_user_id.id or False,
                 'assigned_user_name': step.assigned_user_id.name or '',
@@ -283,14 +285,9 @@ class FpWorkspaceController(http.Controller):
             'is_manager': env.user.has_group(
                 'fusion_plating.group_fusion_plating_manager',
             ),
-            # Racking panel (multi-rack split) shows when the WO is at the
-            # racking step and it's the current actionable work. Detect by
-            # area_kind == 'racking' (corrected classification) — NOT
-            # _fp_is_racking_step(), which would also match mis-tagged
-            # De-Racking steps (kind='racking' in the data).
-            'is_at_racking': bool(job.step_ids.filtered(
-                lambda s: s.area_kind == 'racking'
-                and s.state in ('ready', 'in_progress', 'paused'))),
+            # Note: the rack-split panel is gated per-step via each step's
+            # 'is_racking' flag (area_kind == 'racking'), embedded in the
+            # racking step's row — not a job-level panel.
         }
 
     # ======================================================================