feat(license): add Lite SKU; remove user-facing free trial

Two coupled changes:

1. Lite tier
   - New Tier.LITE in src/license/schema.py.
   - FEATURES_BY_TIER[Tier.LITE] = {Deduplicator, Text Cleaner,
     Format Standardizer}. The three universally-useful tools that
     cover the most common bookkeeping / RevOps / Klaviyo prep
     workflows. Other six tools require Core.
   - i18n: license.tier_lite, license.feature_locked_title,
     license.feature_locked_body, license.upgrade_link,
     license.status_locked (en + es).
   - Per-tool feature gate at every GUI tool page
     (require_feature_or_render_upgrade) and every tool CLI
     (guard(feature=...)). A locked tool renders an upgrade
     prompt + Manage-license button (GUI) or exits with code 2
     (CLI).
   - Home grid: tool cards the user's tier doesn't unlock get a
     red 🔒 Locked badge in place of green Ready.

2. Trial removed
   - Activation form's "Start 1-year trial" button removed.
   - license_cli's `trial` subcommand removed.
   - activation.trial_button / activation.trial_help i18n keys
     dropped (pack parity test stays green).
   - Tier.TRIAL stays in the enum (back-compat with any field-
     tested trial licenses); LicenseManager._mint stays internal
     for tests and the seller's key generator.
   - Decision logged in DECISIONS §9b: a 1-year all-features
     trial undercuts paid Lite; paid-only keeps tier economics
     clean.

Tests (+29 net): +17 Lite-tier unit/guard tests + 13 Lite-tier
GUI tests + 1 trial-absent assertion - 2 trial CLI tests - 1
trial GUI button test. Total: 1995 → 2024.

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

tests/test_license_cli.py

@@ -59,31 +59,18 @@ class TestLicenseCliStatus:
         assert data["days_remaining"] >= 0
 
 
-class TestLicenseCliTrial:
-    def test_trial_issues_one_year_license(self, unactivated_license_manager):
-        runner = CliRunner()
-        result = runner.invoke(license_app, [
-            "trial", "--name", "Trial User", "--email", "trial@example.com",
-        ])
-        assert result.exit_code == 0
-        assert "Trial issued" in result.stdout
-        # And the manager now sees it as active.
-        from src.license import LicenseManager
-        mgr = LicenseManager()
-        assert mgr.is_valid()
-        lic = mgr.load()
-        assert lic.tier.value == "trial"
+class TestNoTrialSubcommand:
+    """The ``trial`` subcommand was removed in v1.6 (no free trial —
+    paid licenses only). Pin its absence so a future re-add has to be
+    intentional."""
 
-    def test_trial_rejects_bad_email(self, unactivated_license_manager):
+    def test_trial_subcommand_not_registered(self):
         runner = CliRunner()
-        result = runner.invoke(license_app, [
-            "trial", "--name", "T", "--email", "not-an-email",
-        ])
-        assert result.exit_code == 2
-        # ``typer.echo(..., err=True)`` lands in ``result.output`` when
-        # ``mix_stderr`` is the default True; ``result.stdout`` only has
-        # the bare stdout.
-        assert "valid email" in result.output.lower()
+        result = runner.invoke(license_app, ["trial", "--help"])
+        assert result.exit_code != 0
+        # Typer surfaces unknown commands with "No such command" or
+        # similar — exact wording varies by version, so we just confirm
+        # it's a usage error, not a successful execution.
 
 
 class TestLicenseCliActivate: