Create Organisation Fix

GEMINI.md

@@ -90,6 +90,7 @@ PostFundManagement/
 ### 2.2 Frontend Projects (React 19 / TypeScript)
 
 #### **`PostFundManagement.ConsoleUI`** (Internal Staff / Portfolio Administration Portal)
+* **Package Manager**: **Yarn** (`yarn.lock` is authoritative; `npm` must not be used)
 * **Runtime & Bundler**: React 19.0.1, TypeScript 5.8.2, Vite 6.2.3
 * **Styling**: Tailwind CSS v4.1.14 (`@tailwindcss/vite`, `@tailwindcss/postcss`)
 * **Routing**: React Router DOM v7.18.3
@@ -102,6 +103,7 @@ PostFundManagement/
 * **Target Users**: Funding Administrators, Programme Managers, Finance Officers, M&E Officers, Risk Managers, System Administrators, Executive Leadership.
 
 #### **`PostFundManagement.PartnerUI`** (External Recipient / Grantee Portal)
+* **Package Manager**: **Yarn** (`yarn.lock` is authoritative; `npm` must not be used)
 * **Runtime & Bundler**: React 19.0.1, TypeScript 7.0.2, Vite 8.3.0
 * **Styling & Effects**: Tailwind CSS v4.3.3, `motion` 12.23.24, `ogl` 1.0.11 (WebGL visual elements like MoltenMetal, BorderGlow, SpecularButton)
 * **Routing**: React Router DOM v7.18.4
@@ -479,6 +481,15 @@ When adding or modifying code in this codebase, strictly follow these standards:
 5. **Frontend State & API Sync**:
    * Use TanStack Query hooks for server caching, optimistic updates, and cache invalidation.
    * Forms must use `react-hook-form` with `zod` schemas enforcing mandatory fields at input time.
+6. **Frontend Package Management (Yarn Mandatory)**:
+   * **Always use `yarn` instead of `npm`** across all frontend projects (`PostFundManagement.ConsoleUI` and `PostFundManagement.PartnerUI`).
+   * Never run `npm install`, `npm run`, or create/modify `package-lock.json`.
+   * Standard commands:
+     * `yarn install` or `yarn` to install dependencies.
+     * `yarn add <pkg>` / `yarn add -D <pkg>` to add dependencies.
+     * `yarn build` to trigger production builds.
+     * `yarn dev` to launch local development servers.
+     * `yarn test` for executing frontend tests.
 
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