feat(auth): add password reset and remember me options

Add password reset request and reset endpoints with email verification
Add "Remember me" option to login for persistent sessions
Create frontend views for forgot and reset password flows

backend/db/schema.sql

@@ -130,6 +130,18 @@ CREATE TABLE IF NOT EXISTS email_verification_tokens (
 CREATE INDEX IF NOT EXISTS email_verification_tokens_user_id_idx
   ON email_verification_tokens(user_id);
 
+CREATE TABLE IF NOT EXISTS password_reset_tokens (
+  id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  user_id integer NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  token_hash text NOT NULL UNIQUE,
+  expires_at timestamptz NOT NULL,
+  used_at timestamptz,
+  created_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS password_reset_tokens_user_id_idx
+  ON password_reset_tokens(user_id);
+
 CREATE TABLE IF NOT EXISTS user_sessions (
   id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
   user_id integer NOT NULL REFERENCES users(id) ON DELETE CASCADE,