First slice of the app.js split (#406). Pure utility / infrastructure
code that both /index.html and /flow.html use lifts out of the IIFE
into a sibling ES module:
- DOM helpers: `$`, `el`, `esc`, `form`, `fmtAgeSecs`
- Side-panel singleton (`Panel.open` / `openNamed` / `refresh` /
`close` / `bind`). The `ensure()` lazy-init makes it tolerate
being imported before the DOM element exists — `bind()` still
needs to be called once the host page is ready.
- Path linkification + file-preview side panel:
`appendLinkified`, `appendText`, `makePathLink`, plus the
internal `openFilePanel` + `fetchStateFile` + `mdNode` /
`svgImage` / `buildTabbedPreview` it depends on.
- Browser-notification module `NOTIF` (`bind`, `show`,
`renderControls`).
`app.js` now imports these from `./common.js` and the duplicated
definitions are gone. Each removal is replaced by a one-line
breadcrumb comment so a reader chasing a name from the bundled
output can find where it landed.
`truncate`, `fmtAgo`, `fmtElapsed`, `fmtDuration` stay in app.js for
now — each has caller-specific phrasing ("X running", "X ago") that
doesn't generalise cleanly. Lift them when a second consumer needs
the same shape.
## Next steps (separate PRs)
- Step 2: split app.js into `tabs.js` (entry for /index.html — tab
renderers + tab routing + refreshState) and `flow.js` (entry for
/flow.html — broker terminal + inbox derived store + compose),
both importing from common.js. Updates `build.mjs` for multiple
entry points and switches each HTML file's `<script src>`.
- Step 3 (#408 follow-up): backend-side stream split so /flow.html
doesn't have to subscribe to the dashboard's mutation events at all.
## Validation
- `npm run build` clean.
- Build deltas: `app.js` 154.3kb (was 153.6kb) — bundle size bumped
slightly due to per-module overhead; same code under the hood.
Source: app.js 2603 → 2287 lines (-316); common.js 367 lines (new).
- No HTML / CSS changes. Both pages still load `/static/app.js` as
before.
Browser smoke test isn't possible from inside iris's container.
Worth eyeballing post-deploy:
- Notification toggle + send still works (NOTIF.bind, NOTIF.show)
- Side panel still opens for diff / file preview / logs (Panel)
- Path tokens in messages still render as clickable anchors that
open the file in the side panel (appendLinkified → makePathLink
→ openFilePanel)
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