feat(fusion_plating_shopfloor): GateViz shared OWL service

Plan task P1.4. "Can't start yet — Waiting on Step N: X" block reused
across JobWorkspace step rows and Manager Plant Board cards. Icon set
maps to blocker_kind (predecessor/contract_review/parts_not_received/
racking_required/manager_input). Optional Jump button propagates to
parent via onJump callback.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_shopfloor/__manifest__.py

@@ -68,6 +68,9 @@ Copyright (c) 2026 Nexa Systems Inc. All rights reserved.
             'fusion_plating_shopfloor/static/src/scss/components/_workflow_chip.scss',
             'fusion_plating_shopfloor/static/src/xml/components/workflow_chip.xml',
             'fusion_plating_shopfloor/static/src/js/components/workflow_chip.js',
+            'fusion_plating_shopfloor/static/src/scss/components/_gate_viz.scss',
+            'fusion_plating_shopfloor/static/src/xml/components/gate_viz.xml',
+            'fusion_plating_shopfloor/static/src/js/components/gate_viz.js',
             'fusion_plating_shopfloor/static/src/scss/qr_scanner.scss',
             'fusion_plating_shopfloor/static/src/scss/fusion_plating_shopfloor.scss',
             'fusion_plating_shopfloor/static/src/scss/plant_overview.scss',

fusion_plating/fusion_plating_shopfloor/static/src/js/components/gate_viz.js

@@ -0,0 +1,53 @@
+/** @odoo-module **/
+// =============================================================================
+// Fusion Plating — GateViz (shared OWL service)
+//
+// "Can't start because…" explainer for fp.job.step blockers. Drives off
+// step.blocker_kind/reason from the backend compute. Used in:
+//   • JobWorkspace step rows (inline)
+//   • Manager Plant Board "Needs Worker" cards (badge form)
+//
+// Props:
+//   canStart           : Boolean       — when true, renders nothing
+//   blockerKind        : String        — predecessor/contract_review/
+//                                        parts_not_received/racking_required/
+//                                        manager_input/other
+//   blockerReason      : String        — human-readable explanation
+//   jumpTargetModel    : String        — optional model name for tap-to-jump
+//   jumpTargetId       : Number        — optional record id for tap-to-jump
+//   onJump             : Function      — called with {model, id} on Jump click
+// =============================================================================
+
+import { Component } from "@odoo/owl";
+
+export class GateViz extends Component {
+    static template = "fusion_plating_shopfloor.GateViz";
+    static props = {
+        canStart: { type: Boolean, optional: false },
+        blockerKind: { type: String, optional: true },
+        blockerReason: { type: String, optional: true },
+        jumpTargetModel: { type: String, optional: true },
+        jumpTargetId: { type: Number, optional: true },
+        onJump: { type: Function, optional: true },
+    };
+
+    get iconClass() {
+        const map = {
+            predecessor:        "fa-lock",
+            contract_review:    "fa-file-text-o",
+            parts_not_received: "fa-truck",
+            racking_required:   "fa-th-large",
+            manager_input:      "fa-user-md",
+        };
+        return map[this.props.blockerKind] || "fa-pause-circle";
+    }
+
+    onJumpClick() {
+        if (this.props.onJump && this.props.jumpTargetModel && this.props.jumpTargetId) {
+            this.props.onJump({
+                model: this.props.jumpTargetModel,
+                id: this.props.jumpTargetId,
+            });
+        }
+    }
+}

fusion_plating/fusion_plating_shopfloor/static/src/scss/components/_gate_viz.scss

@@ -0,0 +1,30 @@
+// =============================================================================
+// GateViz — "this step can't start because..." explainer
+// Dark-mode aware via $o-webclient-color-scheme branch.
+// =============================================================================
+
+$o-webclient-color-scheme: bright !default;
+
+$_gate-bg-hex:     rgba(255, 159, 10, 0.10);
+$_gate-border-hex: #ff9f0a;
+$_gate-text-hex:   #b06600;
+
+@if $o-webclient-color-scheme == dark {
+    $_gate-text-hex: #ffb84d !global;
+}
+
+.o_fp_gate {
+    background: $_gate-bg-hex;
+    border-left: 3px solid $_gate-border-hex;
+    padding: 0.5rem 0.75rem;
+    border-radius: 0 6px 6px 0;
+    display: flex;
+    align-items: flex-start;
+    gap: 0.5rem;
+}
+
+.o_fp_gate_icon  { color: $_gate-border-hex; margin-top: 0.15rem; }
+.o_fp_gate_body  { flex: 1; }
+.o_fp_gate_title { font-weight: 600; color: $_gate-text-hex; font-size: 0.85rem; }
+.o_fp_gate_reason { color: var(--text-secondary, #666); font-size: 0.78rem; margin-top: 0.1rem; }
+.o_fp_gate_jump  { flex-shrink: 0; }

fusion_plating/fusion_plating_shopfloor/static/src/xml/components/gate_viz.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates xml:space="preserve">
+
+    <t t-name="fusion_plating_shopfloor.GateViz">
+        <div class="o_fp_gate" t-if="!props.canStart">
+            <i t-att-class="'fa o_fp_gate_icon ' + iconClass"/>
+            <div class="o_fp_gate_body">
+                <div class="o_fp_gate_title">Can't start yet</div>
+                <div class="o_fp_gate_reason">
+                    <t t-esc="props.blockerReason or 'Reason unknown — open the step in the back-office.'"/>
+                </div>
+            </div>
+            <button t-if="props.jumpTargetModel and props.jumpTargetId and props.onJump"
+                    class="btn btn-sm btn-outline-warning o_fp_gate_jump"
+                    t-on-click="onJumpClick">
+                Jump <i class="fa fa-arrow-right"/>
+            </button>
+        </div>
+    </t>
+
+</templates>