(MOT-4503) feat(cron): schedules page as injectable console UI

[rohitg00]

Why

The cron worker's schedules page (MOT-4503) was reviewed and merged as #840, but into feat/console-consistency, not main. The page is not on main. This PR brings it to main.

The original squash commit could not be cherry-picked: it predated main's SDK 0.23 migration (#604) and the onConversationRequested / registerTranscriptRenderer additions, so replaying it would have reverted those. Instead the cron worker's own additions are rebuilt on current main. The console-side plumbing the page relies on (onConversationRequested, selectConversation, composerModel, the transcript renderer registration) is already on main, so this PR touches only cron/ and the pnpm workspace.

What

• The cron worker gains an injectable console UI: a schedules page (list, detail, manual form) plus a configuration form, registered through crates/console-ui (iii-console-ui) and the @iii-dev/console-ui shared package, following the same pattern as the shell and state pages. cron/ui is added to the pnpm workspace; the bundle is built by build.rs and embedded in the binary.
• cron is bumped to the current SDK: iii-sdk = 0.23.0-rc.2, with the trigger-registration call sites moved to RegisterTriggerInput::new(...) and TriggerConfig gaining the new namespace field. Worker version 0.21.5 → 0.22.0.

No console/, packages/, or harness/ changes: the console contracts this page needs already exist on main. (The harness decode_config robustness fix that was bundled into #840 is not cron-specific and is left out; it can land on its own if wanted.)

Verification

• cron crate: cargo fmt --check, cargo clippy --all-targets --all-features -D warnings, cargo test (28).
• cron/ui: tsc --noEmit, esbuild bundle.
• Rig: binary built and installed; the console registers and serves cron/page.js and cron/styles.css (GET /ui/cron/page.js → 200), and the page mounts.

Linear: MOT-4503

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 3655fc2a-9f19-4b88-8a53-086e9c57ad56

📥 Commits

Reviewing files that changed from the base of the PR and between 2d44541 and b1662fa.

⛔ Files ignored due to path filters (2)

• cron/Cargo.lock is excluded by !**/*.lock
• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (24)

• cron/Cargo.toml
• cron/README.md
• cron/build.rs
• cron/skills/SKILL.md
• cron/src/boot.rs
• cron/src/configuration.rs
• cron/src/lib.rs
• cron/src/ui.rs
• cron/ui/build.mjs
• cron/ui/package.json
• cron/ui/page.tsx
• cron/ui/src/components.tsx
• cron/ui/src/configuration/index.tsx
• cron/ui/src/lib/api.ts
• cron/ui/src/lib/cron.ts
• cron/ui/src/lib/prompts.ts
• cron/ui/src/page/detail.tsx
• cron/ui/src/page/index.tsx
• cron/ui/src/page/manual-form.tsx
• cron/ui/src/page/rows.tsx
• cron/ui/src/page/status.ts
• cron/ui/styles.css
• cron/ui/tsconfig.json
• pnpm-workspace.yaml

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[github-actions]

skill-check — worker

0 verified, 62 skipped (no docs/).

Layer	Result
structure	✓
vale	✓
ai	✓
render	✓

Four for four. Nicely done.