Keep filter popovers and route detail layouts stable

[OziinG]

Closing or applying an Orders filter could scroll the embedded page to its trigger; reopening then placed the popover at a different screen position. Focus restoration now preserves scrolling, and applied/search chips plus Add filter retain their widths in narrow toolbars.

Route Detail renders map → timeline → order list for standalone and All routes views. Route Overview uses explicit label/value line heights and compact spacing; its four metrics remain in two columns down to 521px instead of prematurely stacking into one tall column. Map height and tracking data are unchanged.

Validation:

• Real React/Polaris fixture reproduced a 381px close-induced jump; the same action retains its scroll position after the fix.
• Automatic browser checks verify scrolling, keyboard focus restoration, search/active/Add filter widths: all seven pass at 636×560, 1000×360, and 636×760 iframe sizes. The previous release fails six checks.
• Verified timeline precedes the order table for both route views; the moved timeline content is unchanged.
• Overview checked at 390, 681, and 1440px; no horizontal overflow. At 681px its height is about 165px compared with the prior 288px. An 80-character driver name wraps at 521/681px while every metric retains its 4px label/value gap.
• Integrated npm test passed (888 tests after rebasing onto the merged session authority change); targeted route tests passed (75). Build, typecheck, scoped ESLint and public URL guard passed. Exact-head CI repeats integrated validation. Independent review findings were addressed, including long driver labels.

Release via manual K-food deployment after exact-main CI and the existing server-first prerequisite from PR #315. No Shopify source records or delivery data are modified.