This is unrealistic, a hand crank won’t power a 300 lumen flashlight for long.
My emergency kit has two packs of NiMH AAs and two AA powered flashlights.
And a NiMH charger.
One can add some solar and a powerbank if they want but its not necessary.
A super capacitor won’t run the light long unless you only want moonlight mode. They just can’t hold much juice.