[joepio]

Summary

• Reserve the right edge of the mobile navbar for the resource menu, even when other actions grow.
• Collapse action labels on narrow bars and keep Tags and Share identifiable by their button titles.
• Add a Chromium regression check for 390 px and 320 px viewports that measures the menu button and opens it.

Verification

• Full browser workspace lint passed (pnpm run -r lint; existing warnings only).
• Data browser typecheck passed.
• All four modified translation catalogs passed msgfmt --check.
• The focused Chromium test passed against the original checkout with the same navbar changes. A repeat from this isolated PR worktree stopped during dev-drive setup: the temporary Vite setup served a symlinked Loro WASM file outside its allowed root, and its reused server binary predates the current identity protocol. The layout assertion was not reached in that repeat.

[joepio]

Trekmeester: not batched yet, it needs a rebase with changes. Develop (#1828/#1876) now renders the Tags button only when a resource has tags, so this PR's e2e assertion on navbar-tags-button span fails on a fresh resource. Develop also added a non-resource More menu inside ButtonArea, which this PR's overflow: hidden could clip; it should move into MenuSlot too. Then check the layout at 320px again.

[joepio]

Landed on develop in the combined batch #2060 (95707c0), tested together in one full run. Closing as included.

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