feat(inventory): photo-first drafts + on-device OCR (digitization R2+R4)

Lower the bulk-digitization cliff with two more routes on top of the
already-landed CSV import and "save and add another":

- Photo-first drafts (capture now, catalogue later): burst-capture
  photos (camera or multi-gallery) into unnamed draft varieties, shown
  in a "to catalogue" tray, hidden from the main list until named.
  Adds Variety.isDraft (schema), addDraftVariety/watchDrafts/nameDraft,
  the triage sheet and the inventory banner.
- On-device OCR label suggestion (Tesseract, offline, no Google): a
  "Suggest name from photo" button in the naming dialog behind a
  LabelTextExtractor interface (Tesseract on Android/iOS, no-op
  elsewhere). Reads the largest print via hOCR bounding boxes, drops
  boilerplate/low-confidence noise, preprocesses (grayscale, contrast,
  upscale) and sweeps rotations (0-315 deg) so tilted packets still
  read. Bundles tessdata_fast eng+spa; validated on-device against real
  packets. The photo is written to a temp file deleted immediately in a
  finally block (the plugin needs a path) - a bounded, documented
  exception to no-plaintext-at-rest.

This commit also carries the co-developed schema evolution v5 to v8 that
shares these files (organic flag, species viability years, crop
calendar, lot provenance/abundance/preservation format, condition
checks) plus their exports/migrations and i18n.

Tests: CSV/draft/OCR unit + widget + migration green in isolation.
Note: the full widget suite currently hangs (>10 min) - under investigation.

apps/app_seeds/assets/catalog/species.json

@@ -1,76 +1,90 @@
 {
-  "version": 1,
-  "note": "Curated starter set of Iberian horticultural species. Family and common names are stable; wikidata_qid/gbif_key are intentionally omitted here and enriched later from the varilla (Wikidata CC0 + GBIF) work.",
+  "version": 2,
+  "note": "Curated starter set of common horticultural species — a seed, not a region-locked list. `common` is a locale-keyed map extensible to ANY language (add es/en/fr/de/ar/zh/…); the app resolves names by the user's locale and falls back gracefully, so this must never assume es/en only. Names are enriched later per-locale from the varilla (Wikidata CC0 + GBIF) work, which carries vernacular names in every language. viability_years is typical seed longevity under normal home storage (public-domain agricultural-extension figures); a conservative single value, used to warn about aging lots.",
   "species": [
     {
       "scientific_name": "Solanum lycopersicum",
       "family": "Solanaceae",
-      "common": { "es": ["Tomate"], "en": ["Tomato"] }
+      "common": { "es": ["Tomate"], "en": ["Tomato"] },
+      "viability_years": 5
     },
     {
       "scientific_name": "Solanum melongena",
       "family": "Solanaceae",
-      "common": { "es": ["Berenjena"], "en": ["Aubergine", "Eggplant"] }
+      "common": { "es": ["Berenjena"], "en": ["Aubergine", "Eggplant"] },
+      "viability_years": 5
     },
     {
       "scientific_name": "Capsicum annuum",
       "family": "Solanaceae",
-      "common": { "es": ["Pimiento", "Guindilla"], "en": ["Pepper", "Chilli"] }
+      "common": { "es": ["Pimiento", "Guindilla"], "en": ["Pepper", "Chilli"] },
+      "viability_years": 3
     },
     {
       "scientific_name": "Phaseolus vulgaris",
       "family": "Fabaceae",
-      "common": { "es": ["Judía", "Alubia", "Habichuela"], "en": ["Common bean"] }
+      "common": { "es": ["Judía", "Alubia", "Habichuela"], "en": ["Common bean"] },
+      "viability_years": 3
     },
     {
       "scientific_name": "Vicia faba",
       "family": "Fabaceae",
-      "common": { "es": ["Haba"], "en": ["Broad bean", "Fava bean"] }
+      "common": { "es": ["Haba"], "en": ["Broad bean", "Fava bean"] },
+      "viability_years": 4
     },
     {
       "scientific_name": "Pisum sativum",
       "family": "Fabaceae",
-      "common": { "es": ["Guisante"], "en": ["Pea"] }
+      "common": { "es": ["Guisante"], "en": ["Pea"] },
+      "viability_years": 3
     },
     {
       "scientific_name": "Zea mays",
       "family": "Poaceae",
-      "common": { "es": ["Maíz"], "en": ["Maize", "Corn"] }
+      "common": { "es": ["Maíz"], "en": ["Maize", "Corn"] },
+      "viability_years": 2
     },
     {
       "scientific_name": "Cucurbita pepo",
       "family": "Cucurbitaceae",
-      "common": { "es": ["Calabacín", "Calabaza"], "en": ["Courgette", "Zucchini", "Squash"] }
+      "common": { "es": ["Calabacín", "Calabaza"], "en": ["Courgette", "Zucchini", "Squash"] },
+      "viability_years": 5
     },
     {
       "scientific_name": "Cucumis sativus",
       "family": "Cucurbitaceae",
-      "common": { "es": ["Pepino"], "en": ["Cucumber"] }
+      "common": { "es": ["Pepino"], "en": ["Cucumber"] },
+      "viability_years": 5
     },
     {
       "scientific_name": "Lactuca sativa",
       "family": "Asteraceae",
-      "common": { "es": ["Lechuga"], "en": ["Lettuce"] }
+      "common": { "es": ["Lechuga"], "en": ["Lettuce"] },
+      "viability_years": 3
     },
     {
       "scientific_name": "Beta vulgaris",
       "family": "Amaranthaceae",
-      "common": { "es": ["Acelga", "Remolacha"], "en": ["Chard", "Beetroot"] }
+      "common": { "es": ["Acelga", "Remolacha"], "en": ["Chard", "Beetroot"] },
+      "viability_years": 4
     },
     {
       "scientific_name": "Allium cepa",
       "family": "Amaryllidaceae",
-      "common": { "es": ["Cebolla"], "en": ["Onion"] }
+      "common": { "es": ["Cebolla"], "en": ["Onion"] },
+      "viability_years": 1
     },
     {
       "scientific_name": "Allium sativum",
       "family": "Amaryllidaceae",
-      "common": { "es": ["Ajo"], "en": ["Garlic"] }
+      "common": { "es": ["Ajo"], "en": ["Garlic"] },
+      "viability_years": 1
     },
     {
       "scientific_name": "Daucus carota",
       "family": "Apiaceae",
-      "common": { "es": ["Zanahoria"], "en": ["Carrot"] }
+      "common": { "es": ["Zanahoria"], "en": ["Carrot"] },
+      "viability_years": 3
     }
   ]
 }

apps/app_seeds/assets/ocr_fixtures/README.md

@@ -0,0 +1,18 @@
+# OCR validation fixtures
+
+Real packet photos used by `integration_test/ocr_label_test.dart` to check that
+on-device Tesseract reads the variety name correctly.
+
+Drop your photos here with these names:
+
+- `aubergine.jpg` — the AUBERGINE BLACK BEAUTY packet
+- `cucumber.jpg`  — the CUCUMBER SUPERMARKETER packet
+
+Then run on a connected Android device/emulator (native OCR does not run on the
+host test VM):
+
+    flutter test integration_test/ocr_label_test.dart -d <device>
+
+Each test prints `OCR[<file>] => "<suggestion>"` so you can see exactly what
+Tesseract read. These fixtures are only for validation — remove the folder from
+`pubspec.yaml` assets before shipping if you don't want them in the bundle.

apps/app_seeds/assets/tessdata_config.json

@@ -0,0 +1,6 @@
+{
+  "files": [
+    "eng.traineddata",
+    "spa.traineddata"
+  ]
+}