fix(words): restore Image in column Add-block menu + make Drawer inspector hide/slide

1. Image was missing from the per-column "Add block" menu — the inspector's
   `columnInsertableSpecs` filter excluded `image` outright. Removed the
   exclusion: the image spec's `create()` builds an empty-src placeholder and
   `insertIntoActiveColumn` auto-activates it, so the inspector's image panel
   immediately prompts for the URL / Upload — the canonical placeholder-on-
   insert flow (same one the gutter inserter and slash menu use). Verified:
   menu now lists "Imagen"; selecting it adds a placeholder image to the column
   and switches the inspector to the image panel (URL + Upload + alt + caption).

2. Drawer inspector mode "only shifted" instead of hiding/sliding. The panel is
   parked off the right edge via translateX(100%) when closed, but the frame's
   overflow was `visible`, so the closed panel just sat outside the right border
   (visible) and toggling merely slid it sideways. Added `overflow-x: clip` to
   `[data-words][data-inspector='drawer']` so the closed panel is genuinely
   hidden and the open one emerges from the edge. X-axis only: the block-gutter
   grip (left margin, inside the frame) and the vertically-overflowing bubble
   toolbar stay visible. Verified: closed panel clipped/hidden; open panel slides
   in inside the frame's right edge.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/uix/eidos/components/words/words-inspector.svelte

@@ -91,16 +91,17 @@
 	// entries (`schema.insertable()` flattens heading → H1/H2/H3 and list →
 	// bulleted/numbered/check, with hard-coded English labels). The column
 	// inserter only needs "add a heading" / "add a list" — the precise level
-	// / kind is then tuned in that block's own inspector panel. Excludes:
+	// / kind is then tuned in that block's own inspector panel. Excludes only
-	//   - `columns` — a column is a nested Stack; no columns-in-columns.
+	// `columns` (a column is a nested Stack; no columns-in-columns). Image IS
-	//   - `image`   — its spec is `insertable: false` (needs a URL / upload
+	// offered: its `create()` builds an empty-src placeholder, and inserting
-	//                 flow first), matching the slash menu's exclusion.
+	// auto-activates it so the inspector's image panel immediately prompts for
+	// the URL / Upload — the canonical placeholder-on-insert flow (same one the
+	// gutter inserter and slash menu use).
 	// Labels come from `blockKindLabel(type)` → fully localized.
 	const columnInsertableSpecs = $derived(
 		defaultWordsSchema.all().filter(
 			(spec) =>
 				spec.type !== 'columns' &&
-				spec.type !== 'image' &&
 				// Must expose at least one menu entry whose `create()` builds
 				// the default instance of the kind.
 				(spec.menu?.length ?? 0) > 0

src/uix/eidos/components/words/words.css

@@ -837,6 +837,16 @@ button[data-words-breadcrumb-crumb]:focus-visible {
 }
 
 /* Drawer — slide-in panel from the right edge + a fixed toggle. */
+/* Clip the frame on the X axis so the closed panel — parked off the right
+   edge via translateX(100%) — is genuinely HIDDEN and the open panel appears
+   to emerge from the edge. Without this the frame's overflow stays visible,
+   so the closed panel just sits outside the right border (visible, "only
+   shifts"). `clip` on X only (not `overflow: hidden`): the block-gutter grip
+   lives in the left margin INSIDE the frame, and the bubble toolbar overflows
+   vertically — both must stay visible, so the Y axis is left untouched. */
+[data-words][data-inspector='drawer'] {
+	overflow-x: clip;
+}
 [data-words-drawer-toggle] {
 	position: absolute;
 	inset-block-start: var(--space-3);