Move the browser suites into the repository

They lived in a scratch directory under /tmp, which was cleared overnight;
four of the five were simply gone. Whatever they were worth, they were
worth nothing kept there.

Rewritten against a shared lib.mjs. The old ones registered their users
through the sign-up form, which no longer exists — each suite now creates
a throwaway account through the admin API and deletes it afterwards, so a
run leaves the database as it found it. The previous generation left nine
accounts behind; those are gone too.

Three test hooks went into the app, each of which earns its place beyond
testing: aria-label on the note title (the sidebar search box is also a
text input, and a screen reader could not tell them apart either),
data-note-row on list rows, data-user on admin rows.

Two suites were flaky in ways worth naming, because both were the test
misreading the app rather than the app misbehaving:
- ticking a task then inserting a note link put the link inside the task
  list, since Control+End lands there. Verified against the server that
  the tick itself persists correctly; the suite now leaves the list first
  and asserts where the link ended up.
- the note-title lookup matched the sidebar's Trash entry, which wears the
  same emoji as a note row.

56 checks across five suites, all passing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

e2e/package-lock.json

@@ -0,0 +1,57 @@
+{
+  "name": "inknote-e2e",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "inknote-e2e",
+      "dependencies": {
+        "playwright": "1.49.0"
+      }
+    },
+    "node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
+    "node_modules/playwright": {
+      "version": "1.49.0",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.49.0.tgz",
+      "integrity": "sha512-eKpmys0UFDnfNb3vfsf8Vx2LEOtflgRebl0Im2eQQnYMA4Aqd+Zw8bEOB+7ZKvN76901mRnqdsiOGKxzVTbi7A==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.49.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
+        "fsevents": "2.3.2"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.49.0",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.49.0.tgz",
+      "integrity": "sha512-R+3KKTQF3npy5GTiKH/T+kdhoJfJojjHESR1YEWhYuEKRVfVaxH3+4+GvXE5xyCngCxhxnykk0Vlah9v8fs3jA==",
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    }
+  }
+}