feat: add Firefox extract methods and complete data model fields (#527)

* feat: add Firefox extract methods and complete data model fields

Firefox extract methods:
- extractPasswords: JSON + ASN1PBE decryption via decryptPBE helper
- extractCookies: SQLite, plaintext (no encryption), journalOff
- extractHistories: SQLite, visit count ASC sort (matches old behavior)
- extractDownloads: SQLite, moz_annos JOIN with JSON content parsing
- extractBookmarks: SQLite, moz_bookmarks JOIN moz_places
- extractExtensions: JSON, filter by location=app-profile
- extractLocalStorage: SQLite webappsstore2, reversed originKey parsing

Complete data model fields (union of Chromium and Firefox):
- CookieEntry: add HasExpire, IsPersistent
- DownloadEntry: add MimeType
- CreditCardEntry: add NickName, Address
- ExtensionEntry: add HomepageURL, Enabled

Update Chromium extractors to populate new fields:
- extract_cookie.go: fill HasExpire, IsPersistent
- extract_download.go: SELECT and fill mime_type
- extract_creditcard.go: SELECT nickname, billing_address_id
- extract_extension.go: fill HomepageURL, Enabled (state==1)

Tests:
- Full test coverage for all 7 Firefox extract functions
- Password test uses known ASN1PBE test vectors from crypto package
- Table-driven tests for parseOriginKey
- Updated Chromium tests for new fields

* fix: add COALESCE for nullable bookmark title in Firefox query

Firefox moz_bookmarks.title can be NULL (PR #500 fixed this in old code).
Add COALESCE to handle NULL gracefully in SQL instead of relying on
driver-specific NULL→string conversion behavior.

* fix: enable journalOff for all Firefox SQLite extractors and populate cookie flags

- Set journalOff=true for extract_history, extract_download, extract_bookmark
  (Firefox databases require PRAGMA journal_mode=off to avoid lock errors)
- Populate HasExpire and IsPersistent for Firefox cookies (derived from expiry>0)
- Add test assertions for HasExpire/IsPersistent in both Chromium and Firefox

browser/firefox/extract_cookie.go

@@ -0,0 +1,49 @@
+package firefox
+
+import (
+	"database/sql"
+	"sort"
+
+	"github.com/moond4rk/hackbrowserdata/types"
+	"github.com/moond4rk/hackbrowserdata/utils/sqliteutil"
+	"github.com/moond4rk/hackbrowserdata/utils/typeutil"
+)
+
+const firefoxCookieQuery = `SELECT name, value, host, path,
+	creationTime, expiry, isSecure, isHttpOnly FROM moz_cookies`
+
+func extractCookies(path string) ([]types.CookieEntry, error) {
+	cookies, err := sqliteutil.QueryRows(path, true, firefoxCookieQuery,
+		func(rows *sql.Rows) (types.CookieEntry, error) {
+			var (
+				name, value, host, cookiePath string
+				isSecure, isHTTPOnly          int
+				createdAt, expiry             int64
+			)
+			if err := rows.Scan(&name, &value, &host, &cookiePath,
+				&createdAt, &expiry, &isSecure, &isHTTPOnly); err != nil {
+				return types.CookieEntry{}, err
+			}
+			hasExpire := expiry > 0
+			return types.CookieEntry{
+				Name:         name,
+				Host:         host,
+				Path:         cookiePath,
+				Value:        value, // Firefox cookies are not encrypted
+				IsSecure:     isSecure != 0,
+				IsHTTPOnly:   isHTTPOnly != 0,
+				HasExpire:    hasExpire,
+				IsPersistent: hasExpire,
+				ExpireAt:     typeutil.TimeStamp(expiry),
+				CreatedAt:    typeutil.TimeStamp(createdAt / 1000000),
+			}, nil
+		})
+	if err != nil {
+		return nil, err
+	}
+
+	sort.Slice(cookies, func(i, j int) bool {
+		return cookies[i].CreatedAt.After(cookies[j].CreatedAt)
+	})
+	return cookies, nil
+}