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>

src/license_cli.py

@@ -1,6 +1,6 @@
 """CLI for license management.
 
-Five commands:
+Four commands:
 
 - ``activate BLOB --name NAME --email EMAIL``
     First-time activation. Verifies the signed blob, ensures the
@@ -9,23 +9,23 @@ Five commands:
 - ``renew BLOB``
     Apply a renewal blob to the currently-active license. The blob's
     embedded name + email must match the active license; tier may
-    differ (upgrade path).
+    differ (upgrade path, e.g., Lite → Core).
 
 - ``status [--json]``
     Print the current license state. Human-readable by default;
     ``--json`` emits the same payload as a JSON document for piping
     into shell scripts / monitoring.
 
-- ``trial --name NAME --email EMAIL [--years N]``
-    Self-issue a trial license without a paid blob. Useful for
-    evaluating the product or for support to repro a buyer's issue
-    locally without needing a real key.
-
 - ``deactivate``
     Remove the local license file.
 
 This CLI is exempt from the guard that protects every tool CLI —
 otherwise a user with no license couldn't run ``activate``.
+
+There is **no free-trial subcommand**: every license requires a paid
+blob from the seller. The internal ``LicenseManager._mint`` API is
+used by tests and by the seller's ``scripts/generate_license.py``;
+end users have no way to self-issue a license.
 """
 
 from __future__ import annotations
@@ -134,25 +134,6 @@ def status(
     )
 
 
-@app.command()
-def trial(
-    name: str = typer.Option(..., "--name", "-n"),
-    email: str = typer.Option(..., "--email", "-e"),
-    years: int = typer.Option(1, "--years", help="Trial length (default: 1 year)."),
-) -> None:
-    """Self-issue a trial license without a paid blob."""
-    mgr = get_manager()
-    try:
-        lic = mgr.issue_trial(name=name, email=email, years=years)
-    except LicenseError as e:
-        typer.echo(f"Trial issuance failed: {e}", err=True)
-        raise typer.Exit(code=2)
-    typer.echo(
-        f"Trial issued. Key: {lic.license_key} · "
-        f"Expires: {lic.expires_at[:10]} ({lic.days_remaining()} days)"
-    )
-
-
 @app.command()
 def deactivate(
     confirm: bool = typer.Option(