fix(web): show paste box to any connected user, not only on an empty feed

hasConnected was computed only inside the buckets.empty() branch (it was added
for the empty-state copy), so a connected user WITH videos got hasConnected=false
and never saw the paste box (#2-regression of the v0.12.0 paste UI). Compute it
on every list render. Test: connected user with a non-empty feed sees the box.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/web/paste_handler_test.go

@@ -7,6 +7,7 @@ import (
 	"net/url"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/require"
 
@@ -111,3 +112,23 @@ func TestPasteDedupNoDuplicate(t *testing.T) {
 		userID).Scan(&count))
 	require.Equal(t, 1, count, "pasting the same video twice must not duplicate the row")
 }
+
+func TestListShowsPasteFormForConnectedUserWithVideos(t *testing.T) {
+	app := newApp(t)
+	resetDB(t, rawPool(t))
+	app.Fetcher = &fakeFetcher{title: "x"}
+	p := rawPool(t)
+
+	// Connected user with a non-empty feed (the case the bug missed: hasConnected
+	// was only computed for an empty feed).
+	_, err := p.Exec(context.Background(),
+		`INSERT INTO video_connections (user_id, provider, token_ref, status)
+		 VALUES ($1, 'youtube', 'youtube/x/refresh_token', 'active')`, userID)
+	require.NoError(t, err)
+	seedVideo(t, p, "11111111-1111-1111-1111-111111111111", "A talk", "https://youtu.be/aaaaaaaaaaa", time.Now())
+
+	rec := do(t, app, httptest.NewRequest(http.MethodGet, "/", nil))
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.Contains(t, body(t, rec), `action="/paste"`,
+		"a connected user must see the paste box even when the feed has videos")
+}