Add Timelog: show the timer in the tab title and simplify the code

This is the first commit of the project, at the state that runs on
timelog.minhtrannhat.com.

Changes in this state:
- Remove redundant UI text from the sidebar, timer and insights pages.
- Show the remaining time and tag in the browser tab title while a
  session runs.
- Put the shared record type and the due and end helpers in
  src/shared/record.ts.
- Remove the startup tag migration and the one-time Forest import
  script. The live data does not need them.
- Remove unused CSS, Playwright ignore rules and duplicate helpers.
- Do not track Forest CSV exports, because they contain private data.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "timelog",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "bun run scripts/build.ts",
+    "dev:api": "DEV_AUTH=1 PUBLIC_ORIGIN=http://localhost:3000 DB_PATH=./dev.sqlite bun --watch src/api/server.ts",
+    "dev:web": "WEB_PORT=3000 API_ORIGIN=http://localhost:3001 bun --watch src/web-server.ts",
+    "start:api": "bun src/api/server.ts",
+    "start:web": "bun src/web-server.ts",
+    "test": "bun test",
+    "typecheck": "bunx tsc --noEmit",
+    "vapid": "bun run scripts/vapid.ts"
+  },
+  "dependencies": {
+    "web-push": "^3.6.7"
+  },
+  "devDependencies": {
+    "@types/bun": "^1.3.0",
+    "@types/web-push": "^3.6.4",
+    "typescript": "^5.9.0"
+  }
+}