some question about line mark #2342

my data structure like this:
[ {2024-01-01,2024,10796},
{2024-01-02,2024,11403},
.......
{2024-12-31,2024,13072},
{2025-01-01,2025,13137},
{2025-01-02,2025,15366},
.....
{2025-06-27,2025,11383},
{2025-06-28,2025,10644}]

my code is:
${resize((width)=>
Plot.plot({
width,
marginRight:40,
marks:[
Plot.ruleY([0]),
Plot.lineY(data, {x: {value: "date"},
y: "cost",stroke:"year"})
],
x:{type:"time",
tickformat:"%b",
ticks:"month",
grid:true
},
y:{insetTop:40,label:"单位：元"}
}))}

after runing ,my chart is:

but i want it like this:

and I am a beginner, and I have many similar questions like this. Where should I go to discuss these issues?
thank you very much