wip(popover): unified min-width = anchor + sideOffset 6 across pickers

Day-end checkpoint for the floating-layer normalization work. Documented
in CONTINUE.md.

Done:
- popover.css: new `--_popover-min-width` defaults to
  `var(--floating-anchor-width, auto)` so popover layer is NEVER narrower
  than its anchor (Radix / React Aria convention). Consumers that should
  opt out (tooltip, dialog) override with `auto`.
- soma popover-content default sideOffset 0 → 6.
- 5 picker eidos contents: sideOffset 10 → 6 (matches the new default;
  per-component override removed visually but kept as explicit prop).
- combobox provider: reverted the multi-on-close stamp-labels patch.
  Multi-mode selections will be rendered as inline tags via a future
  `Combobox.SelectedTags` part (Material UI Autocomplete pattern,
  decided with user).

Pending (see CONTINUE.md):
- Re-anchor pickers to their Input wrapper (currently anchored to the
  chevron trigger ~14px). Required for the min-width normalization to
  actually show — research vs Ark UI / Radix / React Aria confirmed
  composite-input pickers anchor to the control wrapper, not the
  trigger button.
- Combobox `SelectedTags` part for multi-mode inline tags.
- SearchField floating Results part (user opted to make it
  Combobox-like rather than reuse Combobox).

svelte-check --threshold error → 0 errors / 0 warnings / 4584 files.

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

src/uix/eidos/components/color-picker/color-picker-content.svelte

@@ -7,7 +7,7 @@
 	let {
 		size,
 		align = 'start',
-		sideOffset = 10,
+		sideOffset = 6,
 		collisionPadding = 12,
 		children: bodyContent,
 		...rest

src/uix/eidos/components/date-picker/date-picker-content.svelte

@@ -8,7 +8,7 @@
 	let {
 		size,
 		align = 'end',
-		sideOffset = 10,
+		sideOffset = 6,
 		collisionPadding = 12,
 		width,
 		minWidth,

src/uix/eidos/components/date-range-picker/date-range-picker-content.svelte

@@ -8,7 +8,7 @@
 	let {
 		size,
 		align = 'end',
-		sideOffset = 10,
+		sideOffset = 6,
 		collisionPadding = 12,
 		width,
 		minWidth,

src/uix/eidos/components/popover/popover.css

@@ -85,12 +85,20 @@
 		--_popover-content-max-height-override,
 		var(--floating-available-height, calc(100dvh - var(--space-4)))
 	);
+	/* Normalized floor — popover layer is NEVER narrower than the anchor
+	   (input / trigger / button it was launched from). Content that wants
+	   to grow beyond still can via `inline-size`. Consumers that should
+	   opt out (tooltip, dialog) override this to `auto`. */
+	--_popover-min-width: var(
+		--_popover-content-min-width-override,
+		var(--floating-anchor-width, auto)
+	);
 
 	display: grid;
 	box-sizing: border-box;
 	gap: var(--popover-gap);
 	inline-size: min(var(--_popover-width), var(--_popover-max-width), calc(100vw - var(--space-4)));
-	min-inline-size: var(--_popover-content-min-width-override, auto);
+	min-inline-size: var(--_popover-min-width);
 	max-inline-size: min(var(--_popover-max-width), calc(100vw - var(--space-4)));
 	block-size: var(--_popover-content-height-override, auto);
 	min-block-size: var(--_popover-content-min-height-override, auto);

src/uix/eidos/components/time-picker/time-picker-content.svelte

@@ -8,7 +8,7 @@
 	let {
 		size,
 		align = 'end',
-		sideOffset = 10,
+		sideOffset = 6,
 		collisionPadding = 12,
 		width,
 		minWidth,

src/uix/eidos/components/time-range-picker/time-range-picker-content.svelte

@@ -8,7 +8,7 @@
 	let {
 		size,
 		align = 'end',
-		sideOffset = 10,
+		sideOffset = 6,
 		collisionPadding = 12,
 		width,
 		minWidth,

src/uix/soma/components/combobox/combobox-provider.svelte.ts

@@ -167,6 +167,10 @@ export class ComboboxProvider {
 				});
 			}
 		});
+
+		// Multi mode renders selections as inline tags via a separate
+		// `Combobox.SelectedTags` part (Material UI Autocomplete pattern).
+		// The input stays for filtering — we don't stamp labels into it.
 	}
 
 	isSelected(value: string): boolean {

src/uix/soma/components/popover/components/popover-content.svelte

@@ -19,7 +19,7 @@
 		id = createId(uid, 'popover-content'),
 		forceMount = false,
 		side = 'bottom',
-		sideOffset = 0,
+		sideOffset = 6,
 		align = 'center',
 		alignOffset = 0,
 		arrowPadding = 0,