feat(schema): make note_id and is_reversed NOT NULL

All cards now require note association - legacy card support removed.
This aligns with the note-based card architecture introduced in Phase 8.

- Add database migration for NOT NULL constraints
- Update client Dexie schema to version 3
- Remove LegacyCardItem component and legacy card handling
- Update sync schemas and type definitions
- Update all tests to use note-based cards

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

3 files changed, 846 insertions, 0 deletions

diff --git a/drizzle/0003_brave_blacklash.sql b/drizzle/0003_brave_blacklash.sql
new file mode 100644
index 0000000..d129f36
--- /dev/null
+++ b/drizzle/0003_brave_blacklash.sql
@@ -0,0 +1,2 @@
+ALTER TABLE "cards" ALTER COLUMN "note_id" SET NOT NULL;--> statement-breakpoint
+ALTER TABLE "cards" ALTER COLUMN "is_reversed" SET NOT NULL;
\ No newline at end of file
diff --git a/drizzle/meta/0003_snapshot.json b/drizzle/meta/0003_snapshot.json
new file mode 100644
index 0000000..1a46c49
--- /dev/null
+++ b/drizzle/meta/0003_snapshot.json
@@ -0,0 +1,837 @@
+{
+  "id": "64c4ab9c-4036-44de-99cb-c4b14f494a4d",
+  "prevId": "4b30f43f-1827-40c6-9814-d749334da729",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.cards": {
+      "name": "cards",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "deck_id": {
+          "name": "deck_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "note_id": {
+          "name": "note_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_reversed": {
+          "name": "is_reversed",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "front": {
+          "name": "front",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "back": {
+          "name": "back",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "state": {
+          "name": "state",
+          "type": "smallint",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "due": {
+          "name": "due",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "stability": {
+          "name": "stability",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "difficulty": {
+          "name": "difficulty",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "elapsed_days": {
+          "name": "elapsed_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "scheduled_days": {
+          "name": "scheduled_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "reps": {
+          "name": "reps",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "lapses": {
+          "name": "lapses",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "last_review": {
+          "name": "last_review",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "cards_deck_id_decks_id_fk": {
+          "name": "cards_deck_id_decks_id_fk",
+          "tableFrom": "cards",
+          "tableTo": "decks",
+          "columnsFrom": [
+            "deck_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "cards_note_id_notes_id_fk": {
+          "name": "cards_note_id_notes_id_fk",
+          "tableFrom": "cards",
+          "tableTo": "notes",
+          "columnsFrom": [
+            "note_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.decks": {
+      "name": "decks",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "new_cards_per_day": {
+          "name": "new_cards_per_day",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 20
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "decks_user_id_users_id_fk": {
+          "name": "decks_user_id_users_id_fk",
+          "tableFrom": "decks",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.note_field_types": {
+      "name": "note_field_types",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "note_type_id": {
+          "name": "note_type_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "order": {
+          "name": "order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "field_type": {
+          "name": "field_type",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'text'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "note_field_types_note_type_id_note_types_id_fk": {
+          "name": "note_field_types_note_type_id_note_types_id_fk",
+          "tableFrom": "note_field_types",
+          "tableTo": "note_types",
+          "columnsFrom": [
+            "note_type_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.note_field_values": {
+      "name": "note_field_values",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "note_id": {
+          "name": "note_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "note_field_type_id": {
+          "name": "note_field_type_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "value": {
+          "name": "value",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "note_field_values_note_id_notes_id_fk": {
+          "name": "note_field_values_note_id_notes_id_fk",
+          "tableFrom": "note_field_values",
+          "tableTo": "notes",
+          "columnsFrom": [
+            "note_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "note_field_values_note_field_type_id_note_field_types_id_fk": {
+          "name": "note_field_values_note_field_type_id_note_field_types_id_fk",
+          "tableFrom": "note_field_values",
+          "tableTo": "note_field_types",
+          "columnsFrom": [
+            "note_field_type_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.note_types": {
+      "name": "note_types",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "front_template": {
+          "name": "front_template",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "back_template": {
+          "name": "back_template",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_reversible": {
+          "name": "is_reversible",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "note_types_user_id_users_id_fk": {
+          "name": "note_types_user_id_users_id_fk",
+          "tableFrom": "note_types",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.notes": {
+      "name": "notes",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "deck_id": {
+          "name": "deck_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "note_type_id": {
+          "name": "note_type_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "notes_deck_id_decks_id_fk": {
+          "name": "notes_deck_id_decks_id_fk",
+          "tableFrom": "notes",
+          "tableTo": "decks",
+          "columnsFrom": [
+            "deck_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "notes_note_type_id_note_types_id_fk": {
+          "name": "notes_note_type_id_note_types_id_fk",
+          "tableFrom": "notes",
+          "tableTo": "note_types",
+          "columnsFrom": [
+            "note_type_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.refresh_tokens": {
+      "name": "refresh_tokens",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token_hash": {
+          "name": "token_hash",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "refresh_tokens_user_id_users_id_fk": {
+          "name": "refresh_tokens_user_id_users_id_fk",
+          "tableFrom": "refresh_tokens",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.review_logs": {
+      "name": "review_logs",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "card_id": {
+          "name": "card_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "rating": {
+          "name": "rating",
+          "type": "smallint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "state": {
+          "name": "state",
+          "type": "smallint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "scheduled_days": {
+          "name": "scheduled_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "elapsed_days": {
+          "name": "elapsed_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "reviewed_at": {
+          "name": "reviewed_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "duration_ms": {
+          "name": "duration_ms",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "review_logs_card_id_cards_id_fk": {
+          "name": "review_logs_card_id_cards_id_fk",
+          "tableFrom": "review_logs",
+          "tableTo": "cards",
+          "columnsFrom": [
+            "card_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "review_logs_user_id_users_id_fk": {
+          "name": "review_logs_user_id_users_id_fk",
+          "tableFrom": "review_logs",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.users": {
+      "name": "users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "username": {
+          "name": "username",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "password_hash": {
+          "name": "password_hash",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "users_username_unique": {
+          "name": "users_username_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "username"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index 5da2908..cdfca60 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -22,6 +22,13 @@
       "when": 1767108756805,
       "tag": "0002_married_moondragon",
       "breakpoints": true
+    },
+    {
+      "idx": 3,
+      "version": "7",
+      "when": 1767156818092,
+      "tag": "0003_brave_blacklash",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file