UI view route speaks two dialects — REST's path-param form is unreachable by the SDK's query-param form (#3587 finding)

[os-zhuang]

Found by the #3587 tranche-2 audit; ledgered as mismatch in packages/rest/src/rest-route-ledger.ts (PR #3609).

The split

• REST mounts GET /api/v1/ui/view/:object/:type — type as a path segment (rest-server.ts:3396; 501 when protocol.getUiView is absent).
• The SDK (client.meta.getView, packages/client/src/index.ts:522-524) sends GET /ui/view/:object?type= — type as a query param.
• The dispatcher /ui domain accepts both forms (domains/ui.ts:32-50; dispatcher ledger row GET /ui/view/:object/:type?).

So the SDK's request pattern (two path segments, not three) never matches REST's route; it falls through to the dispatcher, which answers. REST's route is dead weight for the SDK — and in project-scoped mode, where REST is the only surface registered under /api/v1/environments/:environmentId, a scoped query-dialect call would have no server at all (the scoped client currently exposes no getView, so this is latent, not live).

Fix options

• A (recommended): client switches to the path dialect — meta.getView builds /ui/view/:object/:type. Both surfaces already accept it (dispatcher's :type? is optional-typed), no server change, non-breaking on the wire. One-line client change + tests.
• B: REST additionally registers the query form (GET /ui/view/:object). Keeps two dialects alive forever.
• C: retire REST's ui route and let the dispatcher own /ui. Blocked on scoped-mode coverage (the dispatcher does not strip /environments/:id, http-dispatcher.ts:1223).

Acceptance

• meta.getView provably reaches both surfaces (unit test asserts the built URL; conformance row flips mismatch → sdk).
• Both route ledgers updated and green.

Refs: #3587, PR #3609.