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frontend: create the side-panel instance eagerly, not lazily behind a per-call guard

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Per mara's review on the side-panel PR: create the shared <hive-side-panel>
instance once at module-evaluation time instead of lazily on first call
via an ensurePanel() guard every wrapper method had to remember to call.
ES modules execute after the document is parsed (same timing as a defer
script), so document.body is already available when this code runs --
lazy init bought nothing here and left a footgun for any future method
added to either wrapper.
This commit is contained in:
iris 2026-08-01 00:32:16 +02:00 • committed by mara
commit 996899fcad
2 changed files with 29 additions and 37 deletions
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38
frontend/packages/agent/src/app.js
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@ -39,28 +39,24 @@ window.marked = marked;
// ─── side panel (singleton drawer for inbox + loose-ends flyouts) ──────
// Thin wrapper around the shared `<hive-side-panel>` element (see
// @hive/shared/side-panel.js) — created and appended to <body> lazily
// on first use, same pattern `themedToast` uses for its toast-stack
// container. This UI's `open(name, title, content)` always takes an
// owner name, so it maps straight onto the shared element's
// `openNamed`; `side-panel-body` is a plain compatibility class this
// wrapper puts on its own instance so `agent.css`'s existing
// `.side-panel-body .agent-inbox …` rules keep reaching the slotted
// content by ordinary light-DOM descendant matching.
let panelEl = null;
function ensurePanel() {
if (!panelEl) {
panelEl = document.createElement('hive-side-panel');
panelEl.classList.add('side-panel-body');
document.body.append(panelEl);
}
return panelEl;
}
// @hive/shared/side-panel.js) — created once, eagerly, when this
// module's IIFE runs (ES modules execute after the document is
// parsed, so `document.body` already exists; no per-call lazy-init
// guard to remember for any method, present or future). This UI's
// `open(name, title, content)` always takes an owner name, so it maps
// straight onto the shared element's `openNamed`; `side-panel-body`
// is a plain compatibility class this wrapper puts on its own
// instance so `agent.css`'s existing `.side-panel-body .agent-inbox
// …` rules keep reaching the slotted content by ordinary light-DOM
// descendant matching.
const panelEl = document.createElement('hive-side-panel');
panelEl.classList.add('side-panel-body');
document.body.append(panelEl);
const Panel = {
open: (name, title, content) => ensurePanel().openNamed(name, title, content),
close: () => ensurePanel().close(),
refresh: (name, title, content) => ensurePanel().refresh(name, title, content),
currentOwner: () => ensurePanel().currentOwner(),
open: (name, title, content) => panelEl.openNamed(name, title, content),
close: () => panelEl.close(),
refresh: (name, title, content) => panelEl.refresh(name, title, content),
currentOwner: () => panelEl.currentOwner(),
};
// Wire the header pills to open the side panel. Pre-built (vs