[bug]: Attach button aria-label and analytics "Unassigned" use undefined i18n keys #10248

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

Two t() calls in apps/web use translation keys that no locale defines, so the raw key or untranslated English is shown:

1. Attach button aria-label – apps/web/components/editor/lite-text/lite-toolbar.tsx:35 calls t("attach"), but the string lives at common.attach in packages/i18n/src/locales/en/common.json. Screen readers announce the raw key attach, and the label is never translated.
2. "Unassigned" in the analytics work-items insight table – apps/web/components/analytics/work-items/workitems-insight-table.tsx:128 calls t(`Unassigned`). Keys are case-sensitive and the defined key is unassigned. English looks correct only because the fallback equals the key; every other locale shows English "Unassigned".

Expected: use t("common.attach") and t("unassigned").

Steps to reproduce

1. Switch the interface language to any non-English locale.
2. Open Analytics → Work items and look at a row with no assignee: the text is "Unassigned" in English.
3. Open a work item comment box and inspect the attach (paperclip) button: its aria-label is attach.

Environment

Production

Browser

Google Chrome

Edition

Community

Version

preview @ 618d0eb

I'll open a PR with the fix for this.