feat: custom metric units display and formatting

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.github/workflows/test.yml

@@ -0,0 +1,46 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Get Playwright version
+        id: playwright-version
+        run: echo "version=$(npx playwright --version | awk '{print $2}')" >> "$GITHUB_OUTPUT"
+
+      - name: Cache Playwright browsers
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/ms-playwright
+          key: playwright-${{ runner.os }}-${{ steps.playwright-version.outputs.version }}
+
+      - name: Install Playwright Chromium
+        run: npx playwright install --with-deps chromium
+
+      - name: Type check
+        run: npm run check
+
+      - name: Run tests
+        run: npm test

.gitignore

@@ -12,6 +12,7 @@ config/server.yaml
 /package
 .env
 .vscode
+.idea
 .env.*
 !.env.example
 vite.config.js.timestamp-*
@@ -39,4 +40,5 @@ translation-report.json
 # AI workflow docs (not version-controlled)
 CONTEXT.md
 docs/adr/
-docs/superpowers/
+docs/superpowers/
+.superpowers/

CLAUDE.md

@@ -16,8 +16,14 @@ npm run check        # Svelte + TypeScript type checking
 npm run prettify     # Format all files with Prettier
 npm run migrate      # Run database migrations via Knex
 npm run seed         # Run database seeds (migrations run automatically first)
+npm test             # Run all tests (server unit + browser component projects)
+npm run test:server  # Server-side unit tests only (Node)
+npm run test:client  # Component tests only (headless Chromium via Playwright)
+npm run test:watch   # Watch mode
 ```
 
+Component tests need a one-time `npx playwright install chromium`.
+
 ## Architecture
 
 ### Dual Process Model

migrations/20250111153517_init.ts

@@ -6,6 +6,7 @@ export async function up(knex: Knex): Promise<void> {
       table.string("monitor_tag", 255).notNullable();
       table.integer("timestamp").notNullable();
       table.text("status");
+      // TODO(next-major): rename column latency -> value. Stores any numeric metric, not just milliseconds. (and potentially allow multiple metrics)
       table.float("latency", 8, 2);
       table.text("type");
       table.primary(["monitor_tag", "timestamp"]);