feat(keys): dedicated views group, de-overloaded fetch, account binding

The C-; L keymap and the transient menu had drifted into two different letter schemes for the same commands, the fetch sub-map carried both issue-fetching and view-movement, and pearl-switch-account was bound nowhere.

Give views their own group under v: l/L run local/Linear, c/e/k create/edit/delete, u/U publish local/current, d save a Linear view locally. Fetch (f) is now issue sources only. A new workspace group (w) binds switch-account plus the setup commands, which previously lived only in the transient. v D is reserved, unbound, for the not-yet-built set-default-view.

The transient already had an issue-only fetch group and a dedicated views group, so its changes are additive: switch-account and copy-issue-url were both missing from the menu and are added, and save/save-all/edit-description take s/S/d to match the keymap's hot keys. Matching those three cascades a few view and edit letters because the transient is a flat keyspace where every command needs a unique key.

Suite 789 to 792, compile and lint clean.

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