Add Operations - WO Shortages page with MTS/MTO shortage tracking

Automates the production manager's manual workflow of checking xTuple WO
Schedule + Kit Material Shortage for FA department work orders. Two tabs:
WO Shortages (detail per WO + shortage line with customer name, YYYY-MM-DD
dates) and Critical Parts (aggregated parts blocking near-term shipments
with QOH from MPE warehouse). Nav button added to all pages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.cursor/rules/no-docs-directory.mdc

@@ -0,0 +1,12 @@
+---
+description: Do not create or add to the /docs directory
+alwaysApply: true
+---
+
+# No /docs Directory Changes
+
+Do **not** create new files under `docs/` or add to or modify any content in the `docs/` directory.
+
+- Do not create new files in `docs/`.
+- Do not edit or append to existing files in `docs/`.
+- When a task would normally involve documentation (e.g. README updates, changelog notes), skip any changes under `docs/` unless the user explicitly asks to change that directory.