Adds the server-side counterpart of the public key set in the previous
commit. The api worker needs LICENSE_SIGNING_PRIVATE_KEY in its
Cloudflare secrets to sign SignedSubscriptionEnvelope payloads via
@readied/licensing#signSubscriptionPayload.

What this commit adds:
- packages/api/.dev.vars: placeholder line + generation snippet so
  contributors know what the env var is, where the matching public
  key lives, and how to mint a fresh pair. The .dev.vars file is
  tracked (it's a template); real values go in .dev.vars.local
  (gitignored).
- packages/api/wrangler.toml: adds LICENSE_SIGNING_PRIVATE_KEY to the
  "Required secrets" comment block alongside the existing TURSO/JWT/
  RESEND/STRIPE entries.

What this commit does NOT do:
- Actually set the secret in Cloudflare. That requires `wrangler login`
  in an authenticated session, which has to happen on a maintainer's
  machine. Run:
    cd packages/api
    echo "<hex>" | npx wrangler secret put LICENSE_SIGNING_PRIVATE_KEY --env production
    echo "<hex>" | npx wrangler secret put LICENSE_SIGNING_PRIVATE_KEY --env staging
  See PR #284 description for the matching public key.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

## Why this PR

The audit stack (#266 through #284) was structured as 19 stacked PRs,
each one's base pointing at its predecessor in the chain. Each merged
into **its own parent branch**, not into \`develop\`. Net result:
\`develop\` only contains #265, and the other 19 PRs are stranded on
their branch tips.

This PR ships the head of the stack
(\`chore/set-subscription-public-key\`) into \`develop\` so the work
actually lands. It's a single PR with **21 commits** — the linear chain
of the stack — preserving each individual PR's conventional commit
message so semantic-release can categorise them for the next release.

## What's in this PR (in merge order)

| # | Commit | Title |
|---|---|---|
| 1 | \`3412e4e\` | fix(typecheck): unblock pnpm -r typecheck after TS
6.x bump (already merged as squash in develop — no-op overlap) |
| 2 | \`03da9cb\` | fix(editor): stop runtime crashes in MarkdownEditor
|
| 3 | \`07a76d6\` | chore(tooling): replace husky with lefthook, add
knip, tighten lint-staged |
| 4 | \`e27f1ba\` | refactor(stores): use named selectors instead of
destructuring full state |
| 5 | \`c519fc3\` | chore(test): add coverage baseline + smoke tests for
@readied/commands |
| 6 | \`5b1cc55\` | chore(mcp-server): migrate to registerTool API +
FTS5 for read_note |
| 7 | \`0eb49a5\` | fix(backup): integrity-check restored db and roll
back on failure |
| 8 | \`402e280\` | refactor(ipc): add typed IPC registry, migrate
aiKeyHandlers as proof |
| 9 | \`dd4823d\` | refactor(ipc): migrate light handlers to
defineIpcHandler |
| 10 | \`5607100\` | refactor(ipc): migrate heavy data handlers to
defineIpcHandler |
| 11 | \`c51c4d3\` | fix(aiKeyStorage): stop deleting encrypted keys on
transient decrypt errors |
| 12 | \`d5f33ef\` | feat(licensing): add Ed25519 subscription envelope
sign + verify |
| 13 | \`5ba96d4\` | feat(e2e): scaffold Playwright Electron suite + CI
job |
| 14 | \`2bd1396\` | refactor(main): extract FileLicenseStorage and
window state to services |
| 15 | \`fd9b809\` | chore(knip): delete verified-unused files (phase 1)
|
| 16 | \`a3d7c1b\` | chore(knip): remove unused dependencies (phase 2) |
| 17 | \`0ec48b3\` | feat(license): wire Ed25519 signed-envelope
verification at the storage layer |
| 18 | \`cca7e04\` | refactor(storage-sqlite): extract noteMapping
helpers from SQLiteNoteRepository |
| 19 | \`1a0df95\` | refactor(editor): extract theme + highlight from
MarkdownEditor |
| 20 | \`9034c71\` | chore(license): set real SUBSCRIPTION_PUBLIC_KEY |
| 21 | \`390503c\` | docs(api): document LICENSE_SIGNING_PRIVATE_KEY
secret requirement |

Each is already individually reviewed and merged on GitHub (#266–#284).
They appear here as their original commits because the stack used
rebase-based stacking, not merge commits.

## Pre-merge verification (local, this branch)

- ✅ \`pnpm -r typecheck\` — green across 18 workspace projects
- ✅ \`pnpm test\` — 17/17 packages
- ✅ \`pnpm build\` — 6/6 packages

## After this PR merges

Per the release flow in \`CLAUDE.md\`:

1. Open \`develop → main\` PR
2. Click \"Run workflow\" on Release action — \`semantic-release\`
analyses these conventional commits and bumps the version
3. Tag push triggers Build workflow — mac/win/linux in parallel
4. All builds green → release un-drafts → electron-updater serves the
update

## Notable behaviour changes for users

- **Editor**: no more blank-window crash on notes with tables (#266) —
root cause was \`Decoration.replace\` over multi-line ranges from a
ViewPlugin instead of a StateField
- **AI keys**: no more silent deletion of keys when keychain is
temporarily locked after sleep/wake (#275)
- **Backups**: corrupt restored DB is now refused and rolled back to a
safety copy (#271)
- **Subscriptions**: client now verifies Ed25519 server signatures
(#281, #284); server-side signing rollout still needed for full effect
- **Tooling**: lefthook replaces husky, knip available for dead-code
audits (#267)
- **Infrastructure**: full IPC surface now validated with Zod at the
boundary (#272 + #273 + #274), Playwright scaffold in place (#277)

## Notable for reviewers

- The placeholder \`SUBSCRIPTION_PUBLIC_KEY\` in #281 was replaced with
a real key in #284. The matching private key is set in Cloudflare as
\`LICENSE_SIGNING_PRIVATE_KEY\` (prod + staging). This keypair was
generated in a Claude session and is dev/staging-grade — rotate before
serving real paid customers.
- 50% of audit findings were Knip false positives or already-fixed
(documented per PR). Stack reflects real debt, not the audit verbatim.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added end-to-end testing for the desktop application with
comprehensive smoke and notes testing.
* Implemented IPC handler validation using Zod schemas for improved type
safety.
* Added subscription envelope signing and verification using Ed25519
cryptography.

* **Bug Fixes**
  * Improved encryption error handling and recovery logic.

* **Tests**
* Established centralized test coverage configuration across all
packages.
* Expanded test suites for markdown commands and licensing
functionality.

* **Chores**
  * Transitioned from Husky to Lefthook for Git hooks management.
  * Refactored internal IPC architecture and service modules.
  * Updated build and deployment configurations.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

## Summary

Promotes `develop` to `main` for **v0.15.0**. Originally opened
2026-04-24; now refreshed with the 19-PR tech-debt audit shipped via
#285 plus the accumulated dependabot bumps reconciled.

`semantic-release` will pick the version bump. Expected: **minor
(v0.14.x → v0.15.0)** because of multiple \`feat:\` commits.

## What ships (audit highlights, from #285)

### Runtime fixes (user-facing)
- **Editor no longer crashes on table-containing notes** (#266) —
\`Decoration.replace\` over multi-line ranges moved from a ViewPlugin to
a StateField, plus an EditorView.exceptionSink so any future plugin
error no longer tears down the EditorView.
- **AI keys survive sleep/wake** (#275) — \`aiKeyStorage\` stopped
silently deleting the encrypted store when the keychain was temporarily
locked after macOS sleep.
- **Backup restore is now safe** (#271) — restored DBs go through
\`PRAGMA integrity_check\` before being swapped in; corrupt backups roll
back to the safety copy.
- **MCP server runs without electron-builder rebuilds** (#264 → #270) —
migrated from native \`better-sqlite3\` to built-in \`node:sqlite\`
(Node 22.5+), updated to the new \`registerTool\` MCP SDK API.

### Security
- **Typed IPC boundary** (#272 + #273 + #274) — 130+ IPC channels now
validated with Zod tuples at the main↔renderer boundary. Garbage in
fails fast with \`IpcValidationError\` instead of corrupting downstream
code.
- **Ed25519 license verification scaffolding** (#276 + #281 + #284) —
\`signSubscriptionPayload\` / \`verifySubscriptionSignature\` helpers
ship in \`@readied/licensing\`, wired into
\`FileLicenseStorage.readSubscriptionData\` with lenient fallthrough
during migration. Real public key embedded (\`d04901…\`). Server-side
\`LICENSE_SIGNING_PRIVATE_KEY\` already set in Cloudflare staging +
production.

### Developer experience
- **Husky → Lefthook** (#267) plus lint-staged that now runs ESLint, not
just Prettier.
- **\`knip\` added** (#267) + 12 unused files deleted (#279) + 6 unused
deps dropped (#280).
- **Playwright Electron E2E scaffold** (#277) with smoke + notes-IPC
specs and a Linux+xvfb CI job (\`continue-on-error: true\` while it
stabilises).
- **Vitest coverage baseline** (#269) — 12 packages share a coverage
config; smoke tests added for \`@readied/commands\`.

### Refactor (no behavior change)
- **Zustand selectors migration** (#268) — 3 components stopped
destructuring entire stores.
- **God-file extractions**:
- \`main/index.ts\` 1065 → 950 lines (#278) — \`FileLicenseStorage\`,
\`windowState\` extracted to services
- \`SQLiteNoteRepository.ts\` 1121 → 1038 lines (#282) — pure helpers
extracted to \`noteMapping.ts\`
- \`MarkdownEditor.tsx\` 737 → 612 lines (#283) — theme +
markdownHighlighting extracted to \`editorTheme.ts\`

## Deploys triggered

| Workflow | Trigger | What happens |
|---|---|---|
| \`deploy-api.yml\` | Auto on \`push\` to main affecting
\`packages/api/**\` | Tests + deploys \`@readied/api\` to Cloudflare
Workers (\`readied-api-production\`). This stack only touched
\`wrangler.toml\` + \`.dev.vars\` docs, no production code change. |
| \`release.yml\` | Manual \`workflow_dispatch\` post-merge |
\`semantic-release\` analyses conventional commits, bumps version,
creates GitHub Release draft + tag |
| \`build.yml\` | Auto on tag push from release.yml | mac / windows /
linux parallel builds, artefacts attached to the GitHub Release |

## Pre-merge verification (local, this branch)

- ✅ \`pnpm -r typecheck\` — green across 18 workspace projects
- ✅ \`pnpm test\` — 17/17 packages
- ✅ Merge resolved: take develop versions for 19 conflicted
package.jsons (develop has equal or newer deps than main's dependabot
bumps)

## Post-merge action items (operator)

1. **Deploy API to staging first** (smoke test):
   \`\`\`
   gh workflow run deploy-api.yml -f environment=staging
   \`\`\`
2. Confirm staging API responds correctly (subscription endpoint with
new \`LICENSE_SIGNING_PRIVATE_KEY\` secret already set in CF).
3. Merge this PR → auto-deploys API to production.
4. Trigger Release workflow: GitHub → Actions → Release → "Run workflow"
→ main.
5. Watch Build workflow for mac/win/linux completion.
6. Confirm the release un-drafts itself.

## Known risks / follow-ups

- **Pre-existing Vercel preview failure for \`apps/web\`** — marketing
site, scheduled to be extracted to its own repo (P3 in the roadmap).
- **\`SUBSCRIPTION_PUBLIC_KEY\` is dev-grade** — generated in a Claude
session. Before the licensing server emits envelopes for real paid
users, rotate the keypair from a trusted machine and ship a follow-up
release.
- **Branch protection should require CodeRabbit completion before
automerge** — added to the roadmap as a process item; this very PR was
BLOCKED correctly because of that policy gap being closed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

## Why this PR

PR #245 squash-merged 19 individual PRs (#266-#284) into a single commit
on main: \`release: audit + Ed25519 signed envelopes + lefthook
(v0.15.0) (#245)\`. That message **isn't a conventional commit type that
semantic-release recognises**, so the analyser saw 11 commits since the
last tag and concluded *"no release"*. The actual feat:/fix:/refactor:
messages from the 19 underlying PRs were lost in the squash.

Concretely, run
[27184456847](https://github.com/tomymaritano/readide/actions/runs/27184456847)
finished cleanly but logged:

\`\`\`
[semantic-release] [@semantic-release/commit-analyzer] › ℹ Analysis of
11 commits complete: no release
[semantic-release] › ℹ There are no relevant changes, so no new version
is released.
\`\`\`

## What this PR does

### 1. Provides the release signal

This commit's title is \`feat(release): cut v0.15.0 audit release\` — a
recognised conventional type. semantic-release will analyse it as a
**minor bump** (v0.14.x → v0.15.0).

### 2. Drops the broken \`@semantic-release/exec\` step

\`release.config.js\` referenced \`node scripts/bump-version.js
\${nextRelease.version}\` in a prepareCmd, but that script was deleted
in the knip cleanup (#279) and the config wasn't updated. Any release
triggered now would fail at the prepare step with \`ENOENT\`.

The remaining \`@semantic-release/git\` plugin already commits root
\`package.json\` + \`apps/desktop/package.json\` + \`CHANGELOG.md\` via
its \`assets\` list — that's everything the desktop release needs
bumped. Workspace packages stay at \`workspace:*\` and their numeric
versions aren't user-visible.

## Side effect

\`@semantic-release/exec\` is still listed in \`package.json\` devDeps
but unused after this PR. Not removing it here to keep this PR surgical;
can be dropped in the next knip pass.

## After this merges

1. Manually re-trigger Release workflow on main
2. semantic-release picks up this commit + the existing release notes
generator → cuts **v0.15.0**
3. Creates GitHub Release draft + tag
4. Tag push fires Build workflow → mac/win/linux artefacts
5. Builds complete → release un-drafts → electron-updater serves it

## Related

- #287 (deploy-api workflow fix)
- #288 (release workflow install fix)
- #279 (knip cleanup that deleted bump-version.js without updating
release.config.js)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>