feat(20-02): replace TabloDetailPage stub with templ component + register tab route

- Remove stub templ.ComponentFunc from tablo_detail_view.go; real TabloDetailPage now comes from tablo_detail_templ.go
- Remove context/io/templ imports that were only used by the stub
- Register GET /tablos/{tabloID}/{tab} route in router.go after /tablos/{tabloID}
- All handler tests pass: TestGetTabloDetailPage_*, TestTabloDetailKanbanColumns, TestComputeTabloProgress, TestNewTabloDetailViewModel_*

go-backend/internal/web/views/tablo_detail_view.go

@@ -1,11 +1,8 @@
 package views
 
 import (
-	"context"
 	"fmt"
-	"io"
 
-	"github.com/a-h/templ"
 	tablomodel "xtablo-backend/internal/tablos"
 	taskmodel "xtablo-backend/internal/tasks"
 )
@@ -176,21 +173,3 @@ func tabloStatusPresentation(status tablomodel.Status) (string, string, int, str
 	}
 }
 
-// TabloDetailPage is a stub templ component for the tablo detail page.
-// It will be replaced with a proper templ component in Plan 02.
-// The stub emits the tablo name and initTabloDetailSortable so tests pass.
-func TabloDetailPage(vm TabloDetailViewModel) templ.Component {
-	return templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
-		// Emit column status IDs so TestTabloDetailKanbanColumns passes
-		cols := ""
-		for _, col := range vm.Columns {
-			cols += `<div data-status="` + col.ID + `">` + col.Label + `</div>`
-		}
-		_, err := fmt.Fprintf(w,
-			`<div>%s%s<script>function initTabloDetailSortable(){}</script></div>`,
-			vm.TabloName,
-			cols,
-		)
-		return err
-	})
-}

go-backend/router.go

@@ -43,6 +43,7 @@ func newRouterWithHandler(authHandler *handlers.AuthHandler) http.Handler {
 	mux.Get("/feedback", authHandler.GetFeedbackPage())
 	mux.Post("/tablos", authHandler.PostTablos())
 	mux.Get("/tablos/{tabloID}", authHandler.GetTabloDetailPage())
+	mux.Get("/tablos/{tabloID}/{tab}", authHandler.GetTabloDetailTab())
 	mux.Get("/tablos/{tabloID}/edit", authHandler.GetEditTabloModal())
 	mux.Post("/tablos/{tabloID}", authHandler.PostTabloUpdate())
 	mux.Delete("/tablos/{tabloID}", authHandler.DeleteTablo())