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>

docs/DECISIONS.md

@@ -176,6 +176,8 @@ $49-79/bundle · $149 full suite (when 3+ exist).
 | May 1 (v1.6) | Add `src/core/errors.py` structured hierarchy | Uniform helpful messages across CLI + GUI. See TECHNICAL §7. |
 | May 13 (v1.6) | Ship in-house JSON i18n + EN/ES packs | Expand addressable market (Spanish-first buyers, LatAm bookkeepers) without a `gettext` build step. JSON packs editable by non-devs; parity test prevents drift. See TECHNICAL §10b. |
 | May 13 (v1.6) | Ship licensing: 1-year HMAC-signed blobs, name+email registration, offline verification, tier-scaffolded for future SKUs | Unlock the lifetime-update business model without recurring infra. Honor-system DRM (HMAC + 30-day refund) — sufficient at $49. See §9b below. |
+| May 13 (v1.6) | Add Lite SKU (Dedup + Text Cleaner + Format Standardizer) | Lower-priced entry point for buyers who only need the three universal tools. Per-tool feature gating + lock badges on the home grid surface the upgrade path. See §9b. |
+| May 13 (v1.6) | Remove user-facing free trial | A 1-year all-features trial undercut the paid Lite SKU. Paid-only keeps tier economics clean. Internal ``_mint`` API still exists for tests and the seller's key generator. See §9b. |
 
 ## 9b. Licensing model
 
@@ -203,6 +205,18 @@ $49-79/bundle · $149 full suite (when 3+ exist).
 
 **Future SKUs**: the ``FEATURES_BY_TIER`` table in ``src/license/features.py`` is the single source of truth for "which tools each tier unlocks". Adding a PRO SKU that excludes the pipeline runner is a 1-line edit there + a 1-line edit at the gate site. No consumer-code churn.
 
+**v1.6 SKU lineup**:
+
+| Tier | Tools unlocked | Notes |
+|---|---|---|
+| LITE | Deduplicator, Text Cleaner, Format Standardizer | Entry SKU. Three universal tools that handle the most common bookkeeping / RevOps / Klaviyo prep workflows. |
+| CORE | All 9 tools | Full v1 suite. |
+| PRO | All 9 tools (scaffolded) | Reserved for future per-feature carve-outs (e.g., scheduled pipelines, API access). |
+| ENTERPRISE | All 9 tools (scaffolded) | Reserved for future bulk / multi-seat SKUs. |
+| TRIAL | Same as LITE | Deprecated — no longer issuable. Mapping kept for any legacy on-disk trial licenses to load without error. |
+
+**Trial removed (v1.6)**: a 1-year free trial that unlocked every tool would undercut the paid Lite SKU (why pay for Lite when trial gives more for longer?). Paid-only keeps the funnel clean. The internal ``LicenseManager._mint`` API still exists for tests and for the seller's ``scripts/generate_license.py`` key generator; there's no user-facing way to self-issue a license.
+
 ## 8. Re-lock triggers
 
 These criteria are load-bearing. Triggers for explicit re-evaluation:

docs/DEVELOPER.md

@@ -165,8 +165,37 @@ explicitly use ``isolated_license_path`` /
 1. Add the enum value to ``Tier``.
 2. Add a row to ``FEATURES_BY_TIER`` listing the unlocked flags.
 3. Add ``license.tier_<name>`` translation keys to every i18n pack.
-4. The activation flow, sidebar status badge, and feature gate all
-   pick up the new tier automatically.
+4. The activation flow, sidebar status badge, feature gate, and home
+   grid lock badge all pick up the new tier automatically.
+
+**Worked example — the Lite tier**:
+
+```python
+# src/license/schema.py
+class Tier(str, Enum):
+    LITE = "lite"          # new
+    CORE = "core"
+    ...
+
+# src/license/features.py
+FEATURES_BY_TIER = {
+    ...
+    Tier.LITE: frozenset({
+        FeatureFlag.DEDUPLICATOR,
+        FeatureFlag.TEXT_CLEANER,
+        FeatureFlag.FORMAT_STANDARDIZER,
+    }),
+    Tier.CORE: _all(),
+    ...
+}
+```
+
+Then in en.json/es.json add ``license.tier_lite``. That's it — the
+existing ``require_feature_or_render_upgrade`` (GUI) and
+``guard(feature=...)`` (CLI) calls in every tool page/CLI route a
+Lite user into the upgrade prompt for any tool the tier doesn't
+unlock. The home grid's lock badge fires off the same feature
+lookup.
 
 **Minting a license** (creator-only):
 

docs/REQUIREMENTS.md

@@ -174,13 +174,14 @@ and proceeds.
 - **Dev**: pytest, tox.
 
 ## 16. Test coverage
-- 1,995 tests passing, 0 skipped, 0 xfailed.
-  - 1,843 core + CLI tests (run with `pytest -m 'not gui'` for a quick loop).
-    Includes 40 license-layer unit tests + 26 license-CLI tests.
-  - 152 GUI tests under `tests/gui/` driving Streamlit pages via `AppTest`
+- 2,024 tests passing, 0 skipped, 0 xfailed.
+  - 1,859 core + CLI tests (run with `pytest -m 'not gui'` for a quick loop).
+    Includes 40 license-layer unit tests, 25 license-CLI tests, and
+    17 Lite-tier feature-map + guard tests.
+  - 165 GUI tests under `tests/gui/` driving Streamlit pages via `AppTest`
     (smoke + EN/ES localization, chrome, gate, workflows, dedup review,
-    advanced panels, error paths, findings panel, activation + license
-    gate). Marked `gui`.
+    advanced panels, error paths, findings panel, activation +
+    license gate, Lite-tier per-page lock behaviour). Marked `gui`.
   - Includes 15 perf-shape regression tests.
 - Fixture corpora: text-cleaner (21), encodings (31), reference UTF-8 (9), format-cleaner (199 buyer cases + 20-row international stress fixture), missing-handler (3 use cases + 16 edge cases), column-mapper (3 use cases + 5 edge cases).
 - Run: `python run_tests.py [--tool …] [--fixtures] [--coverage]`.
@@ -199,15 +200,31 @@ and proceeds.
   (``DTLIC1:...``) on first launch; app verifies the signature
   offline + matches the buyer-entered name/email to the embedded
   values.
+- **No free trial**: every license requires a paid blob from the
+  seller. The user-facing trial flow (button + ``license_cli trial``
+  subcommand) was removed in v1.6 to keep paid-tier economics clean.
 - **Lifetime**: every license is 1 year by default. Renewal applies a
-  fresh blob without losing the embedded buyer identity.
-- **Tiers**: ``trial``, ``core`` (the v1 SKU — all 9 tools), ``pro``,
-  ``enterprise``. PRO and ENTERPRISE are scaffolded for future SKUs;
-  they currently unlock the same feature set as CORE.
+  fresh blob without losing the embedded buyer identity. Tier may
+  change during renewal (Lite → Core upgrade path).
+- **Tiers**:
+  - ``lite`` — Deduplicator + Text Cleaner + Format Standardizer.
+    Buyer pays once, gets the three universally-useful tools.
+  - ``core`` — every Ready tool (all 9 in v1.6).
+  - ``pro``, ``enterprise`` — scaffolded for future SKUs; currently
+    mirror Core. Add per-SKU restrictions by editing
+    ``FEATURES_BY_TIER`` in ``src/license/features.py``.
+  - ``trial`` — kept in the enum for backwards compat with any
+    field-tested trial licenses but no longer issuable.
 - **Feature flags**: every tool has a stable feature id matching its
   ``tool_id`` in :mod:`src.gui.tools_registry`. Adding a future per-
   tool SKU is a one-line change to ``FEATURES_BY_TIER`` — no consumer
   code edits.
+- **Per-tool gating**: each tool page (GUI) and tool CLI calls
+  ``require_feature(FeatureFlag.<TOOL>)`` at entry. GUI shows an
+  upgrade prompt + button to the Activate page; CLI prints a
+  message naming the locked feature and exits with code 2.
+- **Lock badge**: the home grid shows a red 🔒 Locked pill on tool
+  cards the current tier doesn't unlock.
 - **Dev bypass**: ``DATATOOLS_DEV_MODE=1`` skips every check (used by
   the test suite and during development).
 - **No internet**: signature verification is fully offline. The

docs/USER-GUIDE.es.md

@@ -8,16 +8,20 @@
 
 DataTools debe activarse antes de desbloquear cualquier herramienta. En el primer arranque verás la pantalla **Activar**.
 
-| Si tienes… | Haz esto |
+Introduce tu nombre completo y correo, pega el código de licencia del correo de compra (empieza con `DTLIC1:`) y pulsa **Activar**. La renovación funciona igual: pega el código de renovación y pulsa **Aplicar renovación**.
+
+**Niveles**:
+
+| Nivel | Herramientas |
 |---|---|
-| Un código de licencia de pago (del correo de compra) | Introduce tu nombre completo y correo, pega el código completo (empieza con `DTLIC1:`), pulsa **Activar**. |
-| Nada todavía, quieres evaluar | Introduce nombre y correo, pulsa **Iniciar prueba de 1 año**. La app emite localmente una licencia de prueba de 1 año — sin pago. |
+| **Lite** | Eliminador de duplicados · Limpiador de texto · Estandarizador de formatos |
+| **Core** | Las 9 herramientas |
 
-La renovación funciona igual: pega el código de renovación, pulsa **Aplicar renovación**. La fecha de caducidad se reinicia a un año desde la renovación.
+Un usuario Lite que abra una herramienta exclusiva de Core verá un mensaje "Actualiza tu licencia". La página de inicio también muestra una marca 🔒 Bloqueado en las tarjetas de las herramientas que tu nivel no incluye. Para actualizar, pega un código Core en la página Activar.
 
-El archivo de licencia vive en `~/.datatools/license.json` (Windows: `C:\Users\<tú>\.datatools\license.json`). La barra lateral muestra tu nivel y los días restantes en todo momento. Aparece un aviso de renovación 30 días antes de la caducidad.
+Cada licencia dura 1 año. La barra lateral muestra tu nivel y los días restantes en todo momento; aparece un aviso de renovación 30 días antes de la caducidad. El archivo de licencia vive en `~/.datatools/license.json` (Windows: `C:\Users\<tú>\.datatools\license.json`).
 
-Si quieres usar la misma licencia en otro equipo, desactiva éste (página Activar → **Desactivar este dispositivo**) y vuelve a pegar tu código en el nuevo.
+Para usar la misma licencia en otro equipo: desactiva éste (página Activar → **Desactivar este dispositivo**) y vuelve a pegar tu código en el nuevo.
 
 ## 1. Instalación
 

docs/USER-GUIDE.md

@@ -8,16 +8,20 @@
 
 DataTools must be activated before any tools unlock. On first launch you'll see the **Activate** screen.
 
-| You have… | Do this |
+Enter your full name + email, paste the license blob from your purchase email (starts with `DTLIC1:`), and click **Activate**. Renewal works the same way — paste the renewal blob, click **Apply renewal**.
+
+**Tiers**:
+
+| Tier | Tools |
 |---|---|
-| A paid license blob (from your purchase email) | Enter your full name + email, paste the entire blob (starts with `DTLIC1:`), click **Activate**. |
-| Nothing yet, want to evaluate | Enter your name + email, click **Start 1-year trial**. The app self-issues a 1-year trial license — no payment required. |
+| **Lite** | Deduplicator · Text Cleaner · Format Standardizer |
+| **Core** | All 9 tools |
 
-Renewal works the same way: paste the renewal blob, click **Apply renewal**. The expiry resets to one year from the renewal date.
+A Lite user opening a Core-only tool sees an "Upgrade your license" prompt. The home page also shows a 🔒 Locked badge on tool cards your tier doesn't unlock. To upgrade, paste a Core blob on the Activate page.
 
-The license file lives at `~/.datatools/license.json` (Windows: `C:\Users\<you>\.datatools\license.json`). The sidebar shows your tier and days remaining at all times. A renewal warning appears 30 days before expiry.
+Every license lasts 1 year. The sidebar shows your tier and days remaining at all times; a renewal warning appears 30 days before expiry. The license file lives at `~/.datatools/license.json` (Windows: `C:\Users\<you>\.datatools\license.json`).
 
-If you ever want to use the same license on a different machine, deactivate this one (Activate page → **Deactivate this device**) and re-paste your blob on the new machine.
+To use the same license on a different machine: deactivate this one (Activate page → **Deactivate this device**) and re-paste your blob on the new machine.
 
 ## 1. Install