chore: switch to Bun for installs, scripts and CI

Replaces package-lock.json with bun.lock (regenerated with Bun 1.3.11) so the
repo has a single lockfile. The README and CI workflow now use bun install
(frozen lockfile), bun run lint, test and build.

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

Author: pythonicode

.github/workflows/ci.yml

@@ -10,11 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: oven-sh/setup-bun@v2
         with:
-          node-version: 22
-          cache: npm
-      - run: npm ci
-      - run: npm run lint
-      - run: npm test
-      - run: npm run build
+          bun-version: 1.3.11
+      - run: bun install --frozen-lockfile
+      - run: bun run lint
+      - run: bun run test
+      - run: bun run build

README.md

@@ -9,22 +9,22 @@ save them as `.anal` files to move between devices or keep a copy.
 
 ## Getting started
 
-Requires Node.js 22 or newer.
+Requires [Bun](https://bun.sh) 1.3 or newer.
 
 ```bash
-npm install
-npm run dev        # start the dev server
+bun install
+bun run dev        # start the dev server
 ```
 
 ## Scripts
 
 | Command | What it does |
 | --- | --- |
-| `npm run dev` | Vite dev server with hot reload |
-| `npm test` | Unit tests (Vitest) |
-| `npm run lint` | Oxlint |
-| `npm run build` | Generate PWA icons, type-check, and build for production |
-| `npm run preview` | Serve the production build locally |
+| `bun run dev` | Vite dev server with hot reload |
+| `bun run test` | Unit tests (Vitest) |
+| `bun run lint` | Oxlint |
+| `bun run build` | Generate PWA icons, type-check, and build for production |
+| `bun run preview` | Serve the production build locally |
 
 ## Configuration