chore: replace pnpm with bun across the project

.github/copilot-instructions.md

@@ -2,7 +2,7 @@
 
 ## Project Overview
 
-**ttscm-ui** is an Electron desktop application built with **SvelteKit**, TypeScript, and Vite. It connects to the Optima API for credential and company management. The app uses standard SvelteKit routing for single-page navigation and pnpm for package management with patches applied to SvelteKit.
+**ttscm-ui** is an Electron desktop application built with **SvelteKit**, TypeScript, and Vite. It connects to the Optima API for credential and company management. The app uses standard SvelteKit routing for single-page navigation and bun for package management with patches applied to SvelteKit.
 
 ## Architecture Layers
 
@@ -76,31 +76,31 @@ Export as a named object, then import/aggregate in `src/lib/index.ts`.
 ### Installation & Setup
 
 ```bash
-pnpm install
+bun install
 ```
 
-Uses pnpm with SvelteKit patches (see `patches/` directory).
+Uses bun with SvelteKit patches (see `patches/` directory).
 
 ### Running in Development
 
 ```bash
-pnpm run start
+bun start
 ```
 
 Electron Forge + Vite handles dev server and hot module replacement (HMR). Dev tools open automatically. Main window loads `/login` first.
 
 ### Building & Packaging
 
-- **Build for production**: `pnpm run package` → outputs to `out/` directory
-- **Create distributable**: `pnpm run make` → creates installers (configure in `forge.config.ts`)
-- **Check types & lint**: `pnpm run check` (runs svelte-kit sync + svelte-check)
+- **Build for production**: `bun run package` → outputs to `out/` directory
+- **Create distributable**: `bun run make` → creates installers (configure in `forge.config.ts`)
+- **Check types & lint**: `bun run check` (runs svelte-kit sync + svelte-check)
 
 ### Testing
 
 #### Unit Tests (Vitest)
 
 ```bash
-pnpm run test:unit
+bun run test:unit
 ```
 
 - Client tests: `src/**/*.svelte.{test,spec}.{js,ts}` (jsdom environment)
@@ -110,7 +110,7 @@ pnpm run test:unit
 #### E2E Tests (Playwright)
 
 ```bash
-pnpm run test:e2e
+bun run test:e2e
 ```
 
 - Tests in `e2e/` directory
@@ -119,7 +119,7 @@ pnpm run test:e2e
 #### Run All Tests
 
 ```bash
-pnpm run test
+bun run test
 ```
 
 Runs unit tests first, then e2e.

.github/workflows/build-and-publish.yaml

@@ -39,22 +39,14 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v4
 
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: latest
-
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: pnpm
+      - name: Install bun
+        uses: oven-sh/setup-bun@v2
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: bun install --frozen-lockfile
 
       - name: Build macOS distributables
-        run: pnpm run make:macos
+        run: bun run make:macos
 
       - name: Upload macOS artifacts to release
         uses: softprops/action-gh-release@v2
@@ -72,22 +64,14 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v4
 
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: latest
-
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: pnpm
+      - name: Install bun
+        uses: oven-sh/setup-bun@v2
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: bun install --frozen-lockfile
 
       - name: Build Windows distributables
-        run: pnpm run make -- --platform win32
+        run: bun run make -- --platform win32
 
       - name: Upload Windows artifacts to release
         uses: softprops/action-gh-release@v2