fix: replace tracked placeholder with CI stub for go:embed

The tracked placeholder.html in internal/web/dist/ was deleted by
make build (which clears the dist directory). Instead, CI jobs
that need Go compilation without a frontend build create a stub
file in a workflow step. This avoids polluting the working tree.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: wesm

.github/workflows/ci.yml

@@ -22,6 +22,9 @@ jobs:
         with:
           go-version-file: go.mod
 
+      - name: Stub frontend embed dir
+        run: mkdir -p internal/web/dist && echo ok > internal/web/dist/stub.html
+
       - uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20  # v9.2.0
         with:
           version: v2.10.1
@@ -51,6 +54,9 @@ jobs:
           install: mingw-w64-x86_64-gcc
           path-type: inherit
 
+      - name: Stub frontend embed dir
+        run: mkdir -p internal/web/dist && echo ok > internal/web/dist/stub.html
+
       - name: Run Go tests
         run: go test -tags fts5 ./... -v -count=1
         env:
@@ -73,6 +79,9 @@ jobs:
         with:
           go-version-file: go.mod
 
+      - name: Stub frontend embed dir
+        run: mkdir -p internal/web/dist && echo ok > internal/web/dist/stub.html
+
       - name: Test with coverage
         run: go test -tags fts5 -race -coverprofile=coverage.out ./...
         env:

.gitignore

@@ -10,9 +10,8 @@ frontend/dist/
 frontend/test-results/
 frontend/playwright-report/
 
-# Embedded frontend build output (keep placeholder for go:embed)
-internal/web/dist/*
-!internal/web/dist/placeholder.html
+# Embedded frontend build output
+internal/web/dist/
 
 # Test/build artifacts
 /dist/