Add persian-tutor: Gradio-based GCSE Persian language learning app

Vocabulary study with FSRS spaced repetition, AI tutoring (Ollama/Claude),
essay marking, idioms browser, Anki export, and dashboard. 918 vocabulary
entries across 39 categories. 41 tests passing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

python/persian-tutor/anki_export.py

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+"""Generate Anki .apkg decks from vocabulary data."""
+
+import genanki
+import random
+
+# Stable model/deck IDs (generated once, kept constant)
+_MODEL_ID = 1607392319
+_DECK_ID = 2059400110
+
+
+def _make_model():
+    """Create an Anki note model with two card templates."""
+    return genanki.Model(
+        _MODEL_ID,
+        "GCSE Persian",
+        fields=[
+            {"name": "English"},
+            {"name": "Persian"},
+            {"name": "Finglish"},
+            {"name": "Category"},
+        ],
+        templates=[
+            {
+                "name": "English → Persian",
+                "qfmt": '<div style="font-size:1.5em">{{English}}</div>'
+                '<br><small>{{Category}}</small>',
+                "afmt": '{{FrontSide}}<hr id="answer">'
+                '<div dir="rtl" style="font-size:2em">{{Persian}}</div>'
+                "<br><div>{{Finglish}}</div>",
+            },
+            {
+                "name": "Persian → English",
+                "qfmt": '<div dir="rtl" style="font-size:2em">{{Persian}}</div>'
+                '<br><small>{{Category}}</small>',
+                "afmt": '{{FrontSide}}<hr id="answer">'
+                '<div style="font-size:1.5em">{{English}}</div>'
+                "<br><div>{{Finglish}}</div>",
+            },
+        ],
+        css=".card { font-family: arial; text-align: center; }",
+    )
+
+
+def export_deck(vocab, categories=None, output_path="gcse-persian.apkg"):
+    """Generate an Anki .apkg deck from vocabulary entries.
+
+    Args:
+        vocab: List of vocabulary entries (dicts with english, persian, finglish, category).
+        categories: Optional list of categories to include. None = all.
+        output_path: Where to save the .apkg file.
+
+    Returns:
+        Path to the generated .apkg file.
+    """
+    model = _make_model()
+    deck = genanki.Deck(_DECK_ID, "GCSE Persian")
+
+    for entry in vocab:
+        if categories and entry.get("category") not in categories:
+            continue
+
+        note = genanki.Note(
+            model=model,
+            fields=[
+                entry.get("english", ""),
+                entry.get("persian", ""),
+                entry.get("finglish", ""),
+                entry.get("category", ""),
+            ],
+            guid=genanki.guid_for(entry.get("id", entry["english"])),
+        )
+        deck.add_note(note)
+
+    package = genanki.Package(deck)
+    package.write_to_file(output_path)
+    return output_path