ci: build terminal-mux-{core,control} before the typechecks that need them

Two typecheck steps fail in a clean checkout with TS2307 "Cannot find module":
"Typecheck @adhdev/terminal-mux-cli" (@adhdev/terminal-mux-core,
@adhdev/terminal-mux-control/{control-socket,storage}) and
"Typecheck @adhdev/daemon-standalone" (@adhdev/terminal-mux-control/api).

Cause is build ordering, not code: workspace imports resolve through each
package's `types`/`exports` — its dist/, not its src/ — and neither
terminal-mux-core nor terminal-mux-control was ever built in the test job.

This is invisible outside CI. Locally, and to Refinery (which runs from the root
worktree), dist/ already exists from earlier builds, so both typechecks pass. It
reproduces only in a clean checkout. It also stayed hidden across two release
attempts because an earlier test failure short-circuited the job before these
steps ran; fixing that failure is what exposed this one.

Build order follows the dependency graph: terminal-mux-core needs
session-host-core (already built above), terminal-mux-control needs both.
ghostty-vt-node is a terminal-mux-core dependency but needs no build step — it
ships prebuilt binaries and is handled by the existing artifact-download step.

Verified in an isolated clone with no root repo on the path: before, those two
typechecks failed; after building the two packages, both pass. Every other test
and typecheck step in the job was also run there and passes.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UEd46KPgN8BctgE6RXyeNr

Author: vilmire

.github/workflows/ci.yml

@@ -169,12 +169,28 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      # Build order follows the @adhdev dependency graph, because the typecheck
+      # steps below resolve workspace imports through each package's published
+      # `types`/`exports` — i.e. through its dist/, not its src/. A package whose
+      # dependency was never built fails with TS2307 "Cannot find module".
+      #
+      # terminal-mux-{core,control} are built here for exactly that reason:
+      # without them "Typecheck @adhdev/terminal-mux-cli" and
+      # "Typecheck @adhdev/daemon-standalone" both fail on TS2307. This is
+      # invisible locally (and to Refinery, which runs from the root worktree)
+      # because dist/ already exists there — it only reproduces in a clean
+      # checkout, which is what CI is.
+      #
+      # Order: session-host-core → terminal-mux-core → terminal-mux-control
+      # (mux-core needs session-host-core; mux-control needs both).
       - name: Build packages required for tests
         run: |
           npm run build -w packages/session-host-core
           npm run build -w packages/session-host-daemon
           npm run build -w packages/mesh-shared
           npm run build -w packages/daemon-core
+          npm run build -w packages/terminal-mux-core
+          npm run build -w packages/terminal-mux-control
 
       - name: Test @adhdev/mesh-shared
         run: npm run test -w packages/mesh-shared