D1 Part 3 leftovers: remove 8 residual emoji + Python emoji gate

- The D0 grep gate false-negatived multibyte emoji on Windows (its zero
  was wrong). scripts/emoji_gate.py scans by Unicode codepoint; it found
  8 survivors: backups.html (📁→file-text icon, 🔄 restore-info text),
  debug.html (🔄→'fut', 🔒→'titkosított'), deploy.html (📦→upload icon,
  ★ default-marker → '(alapértelmezett)'), storage.html (📦→upload icon,
  📦 in the migrate-target option → plain text). All → sprite icons or
  plain words.
- Gates: scripts/emoji_gate.py = 0; new Go TestNoEmojiInTemplates
  codepoint scan keeps it enforced (allowlist: ✓✗✔✘•●○■▶ monochrome
  text marks). go build/vet/test ./... green (18 pkgs).

controller/internal/web/settings_split_test.go

@@ -252,3 +252,41 @@ func TestStorageAgentDownNote(t *testing.T) {
 		t.Error("enrichment JS lacks the warn-note error path")
 	}
 }
+
+// TestNoEmojiInTemplates (D1 §10, Group G): no emoji/pictographs in web templates. Go-side
+// codepoint scan (the D0 grep-based gate false-negatived multibyte emoji on Windows).
+func TestNoEmojiInTemplates(t *testing.T) {
+	allow := map[rune]bool{}
+	for _, r := range "✓✗✔✘•●○■▶" {
+		allow[r] = true
+	}
+	isEmoji := func(r rune) bool {
+		if allow[r] {
+			return false
+		}
+		switch {
+		case r >= 0x1F300 && r <= 0x1FAFF,
+			r >= 0x2600 && r <= 0x26FF,
+			r >= 0x2700 && r <= 0x27BF,
+			r >= 0xFE00 && r <= 0xFE0F,
+			r >= 0x1F1E6 && r <= 0x1F1FF:
+			return true
+		}
+		return false
+	}
+	entries, _ := templateFS.ReadDir("templates")
+	for _, e := range entries {
+		if !strings.HasSuffix(e.Name(), ".html") {
+			continue
+		}
+		b, err := templateFS.ReadFile("templates/" + e.Name())
+		if err != nil {
+			t.Fatal(err)
+		}
+		for _, r := range string(b) {
+			if isEmoji(r) {
+				t.Errorf("%s contains emoji %q (U+%04X)", e.Name(), r, r)
+			}
+		}
+	}
+}