chore(dx): consolidate commands behind make + add editor config

- Make is the canonical interface; pnpm scripts wrap turbo, make wraps pnpm
- CI now calls `make ci-web` / `make ci-desktop` so local == CI
- Add .nvmrc (node 24, matches CI) + engines field
- Add .editorconfig and .vscode (extensions + settings)
- Add `pnpm bootstrap` (deps + Playwright Chromium)
- Add `dev:web` / `dev:desktop` shortcuts
- CONTRIBUTING.md: lead with `make bootstrap`/`make dev-web`,
  link Tauri prereqs, fix wrong `pnpm dev` claim
- CLAUDE.md: command table reflects make-first workflow

.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+	"recommendations": [
+		"biomejs.biome",
+		"tauri-apps.tauri-vscode",
+		"rust-lang.rust-analyzer",
+		"bradlc.vscode-tailwindcss",
+		"editorconfig.editorconfig",
+		"ms-playwright.playwright"
+	]
+}

.vscode/settings.json

@@ -0,0 +1,26 @@
+{
+	"editor.defaultFormatter": "biomejs.biome",
+	"editor.formatOnSave": true,
+	"editor.codeActionsOnSave": {
+		"source.fixAll.biome": "explicit"
+	},
+	"[rust]": {
+		"editor.defaultFormatter": "rust-lang.rust-analyzer"
+	},
+	"typescript.tsdk": "node_modules/typescript/lib",
+	"typescript.enablePromptUseWorkspaceTsdk": true,
+	"search.exclude": {
+		"**/node_modules": true,
+		"**/dist": true,
+		"**/.turbo": true,
+		"**/playwright-report": true,
+		"**/test-results": true,
+		"**/src-tauri/target": true,
+		"**/pnpm-lock.yaml": true,
+		"packages/web/src/api/schema.d.ts": true,
+		"packages/web/src/routeTree.gen.ts": true
+	},
+	"files.associations": {
+		".releaserc.json": "jsonc"
+	}
+}