chore: add prepare script so git installs build dist/

[JohnMcLear]

Summary

• One-line addition of `prepare: pnpm run build` so consumers installing via a git ref (e.g. `pnpm add github:ether/ueberDB#main`) get `dist/` built automatically
• No effect on the npm-tarball install path — `prepare` doesn't run when installing a published tarball
• Picked up while unblocking fix: page sessionstorage cleanup to avoid OOM (#7830) etherpad#7831, whose CI is stuck on `ueberdb2 ^6.1.0` because the publish workflow on this repo has been failing E404 since feat: add paged findKeys (memory-bounded iteration) #981 merged (separate issue — NPM_TOKEN auth)

Test plan

• Diff is one line; no test surface
• Once merged, etherpad#7831 can pin `github:ether/ueberDB#main` to get green CI without waiting for the publish workflow to be repaired

🤖 Generated with Claude Code

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Review Summary by Qodo

Add prepare script for git-based installations

✨ Enhancement

Walkthroughs

Description

• Add prepare script to auto-build dist/ on git installs
• Enables consumers to install via git refs without manual build
• No impact on npm tarball installation path
• Unblocks etherpad CI pinning to main branch

Diagram

flowchart LR
  A["Git install via ref"] -->|"prepare hook runs"| B["pnpm run build"]
  B --> C["dist/ generated"]
  C --> D["Consumer gets built artifacts"]
  E["npm tarball install"] -->|"prepare skipped"| F["No change to existing flow"]

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File Changes

1. package.json ⚙️ Configuration changes +1/-0

Add prepare script for automatic builds

• Added prepare script entry that runs pnpm run build
• Script executes automatically on git-based installations
• Ensures TypeScript sources are compiled to dist/ for git consumers
• Zero impact on npm registry tarball installations

package.json

---

[qodo-free-for-open-source-projects]

Code Review by Qodo

🐞 Bugs (1) 📘 Rule violations (0)

1. Prepare requires pnpm 🐞 Bug ☼ Reliability

Description

The added prepare lifecycle script runs pnpm run build, so any install path that executes
prepare without pnpm on PATH (e.g., installing from a git ref via npm/yarn) will fail before the
package can be used. This is especially risky because the repo’s README documents installation via
npm and the package.json does not declare/enforce a package manager.

Code

package.json[141]

Evidence

prepare was added and it invokes pnpm, which requires pnpm to be present at install time. The
README’s install instructions use npm, and package.json contains no packageManager field (file
ends without one), so consumers are not guided/enforced to have pnpm available; additionally, the
publish workflow notes special handling for packages that have a prepare script.

package.json[135-147]
README.md[32-36]
.github/workflows/npmpublish.yml[87-91]
package.json[1-6]
package.json[158-161]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

## Issue description
`prepare` is a package-manager lifecycle hook that can be executed by installers (not just pnpm). Defining it as `pnpm run build` introduces a hard dependency on a global `pnpm` binary, which can break installs when pnpm is unavailable.

## Issue Context
- `prepare` now shells out to pnpm.
- The README shows `npm install ueberdb2`, so npm usage is expected.
- The publish workflow explicitly calls out special handling when a package has a `prepare` script.

## Fix options (pick one)
1) **Remove pnpm dependency from lifecycle scripts (recommended):**
  - Update `build`, `build:js`, and `build:types` scripts to call local binaries directly (from `node_modules/.bin`), e.g. `rolldown -c ...` and `tsc ...`.
  - Set `prepare` to `npm run build` (or simply `run build`-equivalent) once `build` no longer calls pnpm.

2) **Ensure pnpm is always available when `prepare` runs:**
  - Add a `packageManager` field (pin to a chosen pnpm version) and change `prepare` to use Corepack (e.g., `corepack pnpm run build`) so pnpm can be provisioned even if not globally installed.

## Fix Focus Areas
- package.json[135-147]
- package.json[1-6]
- package.json[158-161]

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

---

[qodo-free-for-open-source-projects]

1. Prepare requires pnpm 🐞 Bug ☼ Reliability

The added prepare lifecycle script runs pnpm run build, so any install path that executes
prepare without pnpm on PATH (e.g., installing from a git ref via npm/yarn) will fail before the
package can be used. This is especially risky because the repo’s README documents installation via
npm and the package.json does not declare/enforce a package manager.

Agent Prompt

## Issue description
`prepare` is a package-manager lifecycle hook that can be executed by installers (not just pnpm). Defining it as `pnpm run build` introduces a hard dependency on a global `pnpm` binary, which can break installs when pnpm is unavailable.

## Issue Context
- `prepare` now shells out to pnpm.
- The README shows `npm install ueberdb2`, so npm usage is expected.
- The publish workflow explicitly calls out special handling when a package has a `prepare` script.

## Fix options (pick one)
1) **Remove pnpm dependency from lifecycle scripts (recommended):**
   - Update `build`, `build:js`, and `build:types` scripts to call local binaries directly (from `node_modules/.bin`), e.g. `rolldown -c ...` and `tsc ...`.
   - Set `prepare` to `npm run build` (or simply `run build`-equivalent) once `build` no longer calls pnpm.

2) **Ensure pnpm is always available when `prepare` runs:**
   - Add a `packageManager` field (pin to a chosen pnpm version) and change `prepare` to use Corepack (e.g., `corepack pnpm run build`) so pnpm can be provisioned even if not globally installed.

## Fix Focus Areas
- package.json[135-147]
- package.json[1-6]
- package.json[158-161]

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

[JohnMcLear]

Closing in favour of #983, which fixes the publish workflow root cause (stored NPM_TOKEN → OIDC trusted publishing). Once #983 lands and the one-time npmjs.com trusted-publisher setup is done, ueberdb2 publishes will be reliable end-to-end and the git-ref install path is no longer needed to unblock ether/etherpad#7831.