feat(store): add account from_address field + v2 migration

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/store/store_test.go

@@ -1,6 +1,7 @@
 package store
 
 import (
+	"database/sql"
 	"path/filepath"
 	"testing"
 )
@@ -28,7 +29,7 @@ func TestOpenCreatesSchemaAndIsIdempotent(t *testing.T) {
 		t.Fatalf("first Open: %v", err)
 	}
 	v, err := s.GetSetting("schema_version")
-	if err != nil || v != "1" {
+	if err != nil || v != "2" {
 		t.Fatalf("schema_version: %q err=%v", v, err)
 	}
 	s.Close()
@@ -39,7 +40,7 @@ func TestOpenCreatesSchemaAndIsIdempotent(t *testing.T) {
 		t.Fatalf("second Open: %v", err)
 	}
 	defer s2.Close()
-	if v, _ := s2.GetSetting("schema_version"); v != "1" {
+	if v, _ := s2.GetSetting("schema_version"); v != "2" {
 		t.Fatalf("schema_version after reopen: %q", v)
 	}
 }
@@ -104,3 +105,63 @@ func TestForeignKeyCascade(t *testing.T) {
 		t.Fatalf("whitelist_in row not cascade-deleted: count=%d err=%v", count, err)
 	}
 }
+
+func TestOpenMigratesV1AddsFromAddress(t *testing.T) {
+	p := filepath.Join(t.TempDir(), "emcli.db")
+
+	// Hand-build a v1 database: accounts table WITHOUT from_address, a settings
+	// table pinned at schema_version=1, and one pre-existing account row.
+	raw, err := sql.Open("sqlite", p)
+	if err != nil {
+		t.Fatalf("sql.Open: %v", err)
+	}
+	const v1Schema = `
+CREATE TABLE settings (key TEXT PRIMARY KEY, value TEXT NOT NULL);
+CREATE TABLE accounts (
+  id            INTEGER PRIMARY KEY AUTOINCREMENT,
+  name          TEXT UNIQUE NOT NULL,
+  mode          TEXT NOT NULL,
+  imap_host     TEXT NOT NULL,
+  imap_port     INTEGER NOT NULL,
+  imap_security TEXT NOT NULL,
+  smtp_host     TEXT, smtp_port INTEGER, smtp_security TEXT,
+  auth_type     TEXT NOT NULL,
+  username      TEXT NOT NULL,
+  enc_password  BLOB,
+  enc_oauth_client_id BLOB, enc_oauth_client_secret BLOB, enc_oauth_refresh_token BLOB,
+  whitelist_in_enabled INTEGER NOT NULL DEFAULT 0,
+  whitelist_out_enabled INTEGER NOT NULL DEFAULT 0,
+  subject_regex TEXT,
+  process_backlog INTEGER NOT NULL DEFAULT 0
+);
+INSERT INTO settings(key,value) VALUES ('schema_version','1');
+INSERT INTO accounts(name,mode,imap_host,imap_port,imap_security,auth_type,username)
+  VALUES ('legacy','RO','imap.example.com',993,'tls','password','login@example.com');
+`
+	if _, err := raw.Exec(v1Schema); err != nil {
+		t.Fatalf("seed v1 schema: %v", err)
+	}
+	raw.Close()
+
+	// Open via the store: the migration must add from_address and bump to v2.
+	s, err := Open(p)
+	if err != nil {
+		t.Fatalf("Open (migrate): %v", err)
+	}
+	defer s.Close()
+
+	if v, _ := s.GetSetting("schema_version"); v != "2" {
+		t.Fatalf("schema_version after migrate: %q, want 2", v)
+	}
+	// ListAccounts SELECTs from_address; it would error if the column were missing.
+	accs, err := s.ListAccounts()
+	if err != nil {
+		t.Fatalf("ListAccounts after migrate: %v", err)
+	}
+	if len(accs) != 1 || accs[0].FromAddress != "" {
+		t.Fatalf("legacy account wrong after migrate: %+v", accs)
+	}
+	if got := accs[0].SendFrom(); got != "login@example.com" {
+		t.Fatalf("legacy account should send from username, got %q", got)
+	}
+}