ci: split workflows for linear development flow

Reshapes .gitea/workflows/ around the new main ← development ←
feature/* branching model:

- go-unit.yaml — Go unit tests, runs on push/PR matching Go paths
- ui-test.yaml — narrowed to Vitest + Playwright only (Go tests now
  live in go-unit.yaml)
- integration.yaml — testcontainers suite, fires on PR to
  development/main and on push to development
- dev-deploy.yaml — builds the stack and (re)deploys tools/dev-deploy/
  on every merge into development
- prod-build.yaml — builds prod images on push to main and uploads
  docker save bundles as artifacts (30-day retention)
- deploy-prod.yaml — workflow_dispatch placeholder for the future
  SSH-based rollout

ui-release.yaml is removed; its v* tag trigger is superseded by
prod-build.yaml plus the manual deploy-prod entry point.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/ui-test.yaml

@@ -1,38 +1,18 @@
 name: ui-test
 
-# Tier 1 (per-PR) workflow. Runs Vitest + Playwright for the UI client and
-# the monorepo Go service tests (everything except the integration suite,
-# which lives behind `make -C integration integration` and needs a Docker
-# daemon set up for testcontainers).
-#
-# The path filter is intentionally broad until a dedicated go-test
-# workflow is introduced; this is the only CI gate today.
+# UI-side unit and end-to-end tests (Vitest + Playwright). The Go side
+# of the workspace is tested in `go-unit.yaml`. Both workflows can run
+# in parallel for a push that touches Go and UI together.
 
 on:
   push:
     paths:
       - 'ui/**'
-      - 'backend/**'
-      - 'gateway/**'
-      - 'game/**'
-      - 'pkg/**'
-      - 'go.work'
-      - 'go.work.sum'
       - '.gitea/workflows/ui-test.yaml'
-      # Skip docs-only commits. Negation removes pure markdown changes;
-      # mixed commits (code + .md) still match a positive pattern above
-      # and trigger the workflow. Image and other binary asset paths
-      # are already outside the positive list.
       - '!**/*.md'
   pull_request:
     paths:
       - 'ui/**'
-      - 'backend/**'
-      - 'gateway/**'
-      - 'game/**'
-      - 'pkg/**'
-      - 'go.work'
-      - 'go.work.sum'
       - '.gitea/workflows/ui-test.yaml'
       - '!**/*.md'
 
@@ -48,41 +28,6 @@ jobs:
         with:
           submodules: recursive
 
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: go.work
-          cache: true
-
-      - name: Run Go tests
-        # client/ is the deprecated Fyne client; excluded from CI per
-        # ui/PLAN.md §74. -count=1 disables Go's test cache so a green
-        # run never depends on a previous runner's cached state. The
-        # backend suite is run with -p 1 because most backend packages
-        # spawn their own Postgres testcontainer, and parallel
-        # Postgres bootstraps starve each other on a constrained
-        # runner. pkg modules are listed one by one because ./pkg/...
-        # does not recurse across the independent go.work modules
-        # under pkg/.
-        run: |
-          go test -count=1 -p 1 ./backend/...
-          go test -count=1 \
-            ./gateway/... \
-            ./game/... \
-            ./ui/core/... \
-            ./pkg/calc/... \
-            ./pkg/connector/... \
-            ./pkg/cronutil/... \
-            ./pkg/error/... \
-            ./pkg/geoip/... \
-            ./pkg/model/... \
-            ./pkg/postgres/... \
-            ./pkg/redisconn/... \
-            ./pkg/schema/... \
-            ./pkg/storage/... \
-            ./pkg/transcoder/... \
-            ./pkg/util/...
-
       - name: Set up pnpm
         uses: pnpm/action-setup@v4
         with: