feat(fusion_plating_shopfloor): fpRpc wrapper + env_for_tablet_tech helper (P6.3.1)

Client-side fpRpc() is a drop-in for rpc() that automatically injects
tablet_tech_id from the tech_store into every action call. Read-only
endpoints can keep using plain rpc().

Server-side env_for_tablet_tech(env, tablet_tech_id) returns an env
scoped via with_user() when the id is a valid active user; otherwise
returns the original env unchanged. Controllers call this at the top
of action methods so all subsequent writes carry the right uid.

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

fusion_plating/fusion_plating_shopfloor/static/src/js/services/fp_rpc.js

@@ -0,0 +1,42 @@
+/** @odoo-module **/
+// =============================================================================
+// Fusion Plating — fpRpc() wrapper
+//
+// Drop-in replacement for the standard `rpc()` import. Automatically
+// injects the current tablet_tech_id from the tech_store into every
+// call, so server-side endpoints can attribute the action to the right
+// user via env.with_user() (see env_for_tablet_tech in
+// controllers/_tablet_audit.py).
+//
+// USE for any RPC that WRITES (start step, finish step, hold create,
+// sign-off, milestone advance). For read-only loads (kanban, workspace
+// load, manager funnel), plain rpc() is fine.
+//
+// Example:
+//   import { fpRpc } from "../services/fp_rpc";
+//   await fpRpc("/fp/shopfloor/start_wo", { workorder_id: stepId });
+//
+// =============================================================================
+
+import { rpc as baseRpc } from "@web/core/network/rpc";
+
+function _getTechStore() {
+    // Lazy-resolve via the global debug API — avoids circular service init
+    try {
+        const env = odoo.__WOWL_DEBUG__?.root?.env;
+        if (env && env.services && env.services.fp_shopfloor_tech_store) {
+            return env.services.fp_shopfloor_tech_store;
+        }
+    } catch (e) {
+        // ignore
+    }
+    return null;
+}
+
+export function fpRpc(url, params = {}) {
+    const techStore = _getTechStore();
+    if (techStore && techStore.currentTechId) {
+        params = { ...params, tablet_tech_id: techStore.currentTechId };
+    }
+    return baseRpc(url, params);
+}