orpc-v2: UI client and everything-dev type-gen on v2 types

Ticket ID: B6

Parent

#248 — orpc-v2: consolidate fork into everything-dev and migrate platform to oRPC v2 + Effect 4 (epic)

What to build

Stage B, step 6: move the UI's api client and the everything-dev CLI's generated contract types onto v2 type names — ContractRouterClient → RouterContractClient and AnyContractRouter → RouterContract — in both the type-generation module and the child-repo scaffold templates. Regenerate the gitignored generated types (bos types gen) and confirm the auto-regen hooks (typecheck / bos dev / bos build) still work.

Acceptance criteria

• UI typecheck green against regenerated v2 types
• Child-repo scaffold templates emit the new type names; bos init output compiles
• bos types gen round-trips; auto-regen on typecheck/dev/build intact

Blocked by

• #260 — migrate all six contracts to the v2 route builder
• #265 — host handlers, OpenAPI 3.1.1 pin, and MCP tool generation

Start with the type-generation module and child-repo scaffold templates, then inspect the bos types gen command and the typecheck, bos dev, and bos build auto-regen hooks. Confirm the v2 names are emitted throughout, regenerated types pass UI typecheck, bos init output compiles, and generation round-trips. This work is blocked by issues #260 and #265.