feat(i18n): localize cookies policy page

Replace all hardcoded English strings in cookies.html with _() i18n
helper calls and add 35 new cookie_policy.* translation keys to
frontend/translations/en.json. Also improve table accessibility with
aria-label and scope attributes."

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

frontend/translations/en.json

@@ -252,6 +252,41 @@
   "cookie.notice_label": "Cookie notice",
   "cookie.policy_link": "Cookie Policy",
   "cookie.privacy_link": "Privacy Notice",
+  "cookie_policy.heading": "Cookie Policy",
+  "cookie_policy.last_updated": "Last Updated:",
+  "cookie_policy.page_title": "Cookie Policy - DocuElevate",
+  "cookie_policy.s1_heading": "What Are Cookies",
+  "cookie_policy.s1_p1": "Cookies are small text files that are stored on your computer or mobile device when you visit a website. They are widely used to make websites work more efficiently and provide information to the website owners.",
+  "cookie_policy.s2_heading": "How We Use Cookies",
+  "cookie_policy.s2_li1_body": "To identify you when you sign in and maintain your session while you use the application.",
+  "cookie_policy.s2_li1_label": "Authentication & Session Management:",
+  "cookie_policy.s2_p1_post": "for the following purpose:",
+  "cookie_policy.s2_p1_pre": "DocuElevate uses",
+  "cookie_policy.s2_p1_strong": "only strictly necessary session cookies",
+  "cookie_policy.s2_p2": "These cookies are mandatory for the proper functioning of our service. Without these cookies, you would be required to log in repeatedly during your browsing session.",
+  "cookie_policy.s2_p3": "Because these cookies are strictly necessary for the service to function, they are exempt from prior-consent requirements under the EU ePrivacy Directive (Art. 5(3)) and equivalent national implementations. We do not set any optional, analytics, advertising, or tracking cookies.",
+  "cookie_policy.s3_col_duration": "Duration",
+  "cookie_policy.s3_col_name": "Name",
+  "cookie_policy.s3_col_purpose": "Purpose",
+  "cookie_policy.s3_col_type": "Type",
+  "cookie_policy.s3_heading": "Cookie Details",
+  "cookie_policy.s3_row1_duration": "Session (deleted on browser close or logout)",
+  "cookie_policy.s3_row1_purpose": "Maintains your authenticated session; required for login to function.",
+  "cookie_policy.s3_row1_type": "Strictly Necessary",
+  "cookie_policy.s3_row2_duration": "Persistent (browser localStorage)",
+  "cookie_policy.s3_row2_purpose": "Stores your acknowledgement of the cookie notice so it is not shown repeatedly (stored in localStorage, not a cookie).",
+  "cookie_policy.s3_row2_type": "Strictly Necessary",
+  "cookie_policy.s4_heading": "No Third-Party Cookies",
+  "cookie_policy.s4_p1": "DocuElevate does not use any third-party cookies, tracking cookies, advertising cookies, or analytics cookies. We respect your privacy and only implement the minimum cookies required for our service to function.",
+  "cookie_policy.s4_p2_pre": "For more information about how we handle your data, please see our",
+  "cookie_policy.s4_privacy_link": "Privacy Notice",
+  "cookie_policy.s5_heading": "Managing Cookies",
+  "cookie_policy.s5_p1": "Most web browsers allow you to control cookies through their settings. However, blocking or deleting our session cookies will prevent DocuElevate from functioning, as user authentication relies on these cookies.",
+  "cookie_policy.s5_p2": "You may also clear the cookie notice acknowledgement stored in your browser's localStorage at any time via your browser's developer tools (Application \u2192 Local Storage).",
+  "cookie_policy.s5_p3_and": "and",
+  "cookie_policy.s5_p3_pre": "This Cookie Policy is part of and incorporated into our",
+  "cookie_policy.s5_privacy_link": "Privacy Notice",
+  "cookie_policy.s5_terms_link": "Terms of Service",
   "credentials.col_action": "Action",
   "credentials.col_credential": "Credential",
   "credentials.col_source": "Source",