feat: 添加图表统计功能

- TG: /chart 本月分类饼图, /week 近7天消费柱状图
- QQ: 统计/报表 本月文本统计
- 新增 go-chart 依赖生成 PNG 图表
- 新增 GetCategoryStats/GetDailyStats 查询方法

go.mod

@@ -22,6 +22,7 @@ require (
 	github.com/go-playground/validator/v10 v10.14.0 // indirect
 	github.com/go-resty/resty/v2 v2.6.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
@@ -38,12 +39,14 @@ require (
 	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect
+	github.com/wcharczuk/go-chart/v2 v2.1.2 // indirect
 	golang.org/x/arch v0.3.0 // indirect
-	golang.org/x/crypto v0.16.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/image v0.18.0 // indirect
+	golang.org/x/net v0.25.0 // indirect
 	golang.org/x/oauth2 v0.23.0 // indirect
-	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
 	google.golang.org/protobuf v1.30.0 // indirect
 )

go.sum

@@ -36,6 +36,8 @@ github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1 h1:wG8n/XJQ07TmjbITcGi
 github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1/go.mod h1:A2S0CWkNylc2phvKXWBBdD3K0iGnDBGbzRpISP2zBl8=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
@@ -52,6 +54,7 @@ github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
@@ -125,6 +128,8 @@ github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.2.11 h1:BMaWp1Bb6fHwEtbplGBGJ498wD+LKlNSl25MjdZY4dU=
 github.com/ugorji/go/codec v1.2.11/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
+github.com/wcharczuk/go-chart/v2 v2.1.2 h1:Y17/oYNuXwZg6TFag06qe8sBajwwsuvPiJJXcUcLL6E=
+github.com/wcharczuk/go-chart/v2 v2.1.2/go.mod h1:Zi4hbaqlWpYajnXB2K22IUYVXRXaLfSGNNR7P4ukyyQ=
 github.com/yanyiwu/gojieba v1.3.0 h1:6VeaPOR+MawnImdeSvWNr7rP4tvUfnGlEKaoBnR33Ds=
 github.com/yanyiwu/gojieba v1.3.0/go.mod h1:54wkP7sMJ6bklf7yPl6F+JG71dzVUU1WigZbR47nGdY=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -136,11 +141,20 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
 golang.org/x/crypto v0.16.0 h1:mMMrFzRSCF0GvB7Ne27XVtVAaXLrPmgPC7/v0tkwHaY=
 golang.org/x/crypto v0.16.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
+golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
+golang.org/x/crypto v0.23.0 h1:dIJU/v2J8Mdglj/8rJ6UUOM3Zc9zLZxVZwwxMooUSAI=
+golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
+golang.org/x/image v0.18.0 h1:jGzIakQa/ZXI1I0Fxvaa9W7yP25TqT6cHIHn+6CqvSQ=
+golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -152,8 +166,12 @@ golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
 golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/net v0.25.0 h1:d/OCCoBEUq33pjydKrGQhw7IlUPI2Oylr+8qLx49kac=
+golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
 golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
 golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -162,6 +180,10 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -181,26 +203,40 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
 golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/term v0.15.0/go.mod h1:BDl952bC7+uMoWR75FIrCDx79TPU9oHkTZ9yRbYOrX0=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
+golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

internal/bot/telegram.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	xchart "xiaji-go/internal/chart"
 	"xiaji-go/internal/service"
 
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
@@ -61,10 +62,10 @@ func (b *TGBot) handleMessage(msg *tgbotapi.Message) {
 
 	switch {
 	case text == "/start":
-		reply = "🦞 欢迎使用虾记记账！\n\n直接发送消费描述即可记账，例如：\n• 午饭 25元\n• 打车 ¥30\n• 买咖啡15块\n\n命令：\n/list - 查看最近记录\n/help - 帮助"
+		reply = "🦞 欢迎使用虾记记账！\n\n直接发送消费描述即可记账，例如：\n• 午饭 25元\n• 打车 ¥30\n• 买咖啡15块\n\n命令：\n/list - 查看最近记录\n/today - 今日汇总\n/chart - 本月图表\n/help - 帮助"
 
 	case text == "/help":
-		reply = "📖 使用说明：\n\n直接发送带金额的文本即可自动记账。\n系统会自动识别金额和消费分类。\n\n支持格式：\n• 午饭 25元\n• ¥30 打车\n• 买水果15块\n\n命令：\n/list - 最近10条记录\n/today - 今日汇总\n/start - 欢迎信息"
+		reply = "📖 使用说明：\n\n直接发送带金额的文本即可自动记账。\n系统会自动识别金额和消费分类。\n\n支持格式：\n• 午饭 25元\n• ¥30 打车\n• 买水果15块\n\n命令：\n/list - 最近10条记录\n/today - 今日汇总\n/chart - 本月消费图表\n/week - 近7天每日趋势\n/start - 欢迎信息"
 
 	case text == "/today":
 		today := time.Now().Format("2006-01-02")
@@ -85,6 +86,14 @@ func (b *TGBot) handleMessage(msg *tgbotapi.Message) {
 			reply = sb.String()
 		}
 
+	case text == "/chart":
+		b.sendMonthlyChart(chatID)
+		return
+
+	case text == "/week":
+		b.sendWeeklyChart(chatID)
+		return
+
 	case text == "/list":
 		items, err := b.finance.GetTransactions(DefaultUserID, 10)
 		if err != nil {
@@ -122,3 +131,79 @@ func (b *TGBot) handleMessage(msg *tgbotapi.Message) {
 		log.Printf("发送消息失败 chat=%d: %v", chatID, err)
 	}
 }
+
+// sendMonthlyChart 发送本月分类饼图
+func (b *TGBot) sendMonthlyChart(chatID int64) {
+	now := time.Now()
+	dateFrom := now.Format("2006-01") + "-01"
+	dateTo := now.Format("2006-01-02")
+	title := fmt.Sprintf("%d年%d月消费分类", now.Year(), now.Month())
+
+	stats, err := b.finance.GetCategoryStats(DefaultUserID, dateFrom, dateTo)
+	if err != nil || len(stats) == 0 {
+		m := tgbotapi.NewMessage(chatID, "📭 本月暂无消费数据")
+		b.api.Send(m)
+		return
+	}
+
+	imgData, err := xchart.GeneratePieChart(stats, title)
+	if err != nil {
+		log.Printf("生成饼图失败: %v", err)
+		m := tgbotapi.NewMessage(chatID, "❌ 图表生成失败")
+		b.api.Send(m)
+		return
+	}
+
+	// 计算总计文字
+	var total int64
+	var totalCount int
+	for _, s := range stats {
+		total += s.Total
+		totalCount += s.Count
+	}
+	caption := fmt.Sprintf("📊 %s\n💰 共 %d 笔，合计 %.2f 元", title, totalCount, float64(total)/100.0)
+
+	photo := tgbotapi.NewPhoto(chatID, tgbotapi.FileBytes{Name: "chart.png", Bytes: imgData})
+	photo.Caption = caption
+	if _, err := b.api.Send(photo); err != nil {
+		log.Printf("发送图表失败 chat=%d: %v", chatID, err)
+	}
+}
+
+// sendWeeklyChart 发送近7天每日消费柱状图
+func (b *TGBot) sendWeeklyChart(chatID int64) {
+	now := time.Now()
+	dateFrom := now.AddDate(0, 0, -6).Format("2006-01-02")
+	dateTo := now.Format("2006-01-02")
+	title := fmt.Sprintf("近7天消费趋势 (%s ~ %s)", dateFrom[5:], dateTo[5:])
+
+	stats, err := b.finance.GetDailyStats(DefaultUserID, dateFrom, dateTo)
+	if err != nil || len(stats) == 0 {
+		m := tgbotapi.NewMessage(chatID, "📭 近7天暂无消费数据")
+		b.api.Send(m)
+		return
+	}
+
+	imgData, err := xchart.GenerateBarChart(stats, title)
+	if err != nil {
+		log.Printf("生成柱状图失败: %v", err)
+		m := tgbotapi.NewMessage(chatID, "❌ 图表生成失败")
+		b.api.Send(m)
+		return
+	}
+
+	// 总计
+	var total int64
+	var totalCount int
+	for _, s := range stats {
+		total += s.Total
+		totalCount += s.Count
+	}
+	caption := fmt.Sprintf("📈 %s\n💰 共 %d 笔，合计 %.2f 元", title, totalCount, float64(total)/100.0)
+
+	photo := tgbotapi.NewPhoto(chatID, tgbotapi.FileBytes{Name: "chart.png", Bytes: imgData})
+	photo.Caption = caption
+	if _, err := b.api.Send(photo); err != nil {
+		log.Printf("发送图表失败 chat=%d: %v", chatID, err)
+	}
+}

internal/chart/chart.go

@@ -0,0 +1,126 @@
+package chart
+
+import (
+	"bytes"
+	"fmt"
+	"math"
+
+	"xiaji-go/internal/service"
+
+	"github.com/wcharczuk/go-chart/v2"
+	"github.com/wcharczuk/go-chart/v2/drawing"
+)
+
+// 分类对应的颜色
+var categoryColors = []drawing.Color{
+	{R: 255, G: 99, B: 132, A: 255},  // 红
+	{R: 54, G: 162, B: 235, A: 255},   // 蓝
+	{R: 255, G: 206, B: 86, A: 255},   // 黄
+	{R: 75, G: 192, B: 192, A: 255},   // 青
+	{R: 153, G: 102, B: 255, A: 255},  // 紫
+	{R: 255, G: 159, B: 64, A: 255},   // 橙
+	{R: 46, G: 204, B: 113, A: 255},   // 绿
+	{R: 231, G: 76, B: 60, A: 255},    // 深红
+	{R: 52, G: 73, B: 94, A: 255},     // 深蓝灰
+	{R: 241, G: 196, B: 15, A: 255},   // 金
+}
+
+// GeneratePieChart 生成分类占比饼图
+func GeneratePieChart(stats []service.CategoryStat, title string) ([]byte, error) {
+	if len(stats) == 0 {
+		return nil, fmt.Errorf("no data")
+	}
+
+	var total float64
+	for _, s := range stats {
+		total += float64(s.Total)
+	}
+
+	var values []chart.Value
+	for i, s := range stats {
+		yuan := float64(s.Total) / 100.0
+		pct := float64(s.Total) / total * 100
+		label := fmt.Sprintf("%s %.0f元(%.0f%%)", s.Category, yuan, pct)
+		values = append(values, chart.Value{
+			Value: yuan,
+			Label: label,
+			Style: chart.Style{
+				FillColor:   categoryColors[i%len(categoryColors)],
+				StrokeColor: drawing.ColorWhite,
+				StrokeWidth: 2,
+			},
+		})
+	}
+
+	pie := chart.PieChart{
+		Title:  title,
+		Width:  600,
+		Height: 500,
+		TitleStyle: chart.Style{
+			FontSize: 16,
+		},
+		Values: values,
+	}
+
+	buf := &bytes.Buffer{}
+	if err := pie.Render(chart.PNG, buf); err != nil {
+		return nil, fmt.Errorf("render pie chart: %w", err)
+	}
+	return buf.Bytes(), nil
+}
+
+// GenerateBarChart 生成每日消费柱状图
+func GenerateBarChart(stats []service.DailyStat, title string) ([]byte, error) {
+	if len(stats) == 0 {
+		return nil, fmt.Errorf("no data")
+	}
+
+	var values []chart.Value
+	var maxVal float64
+	for _, s := range stats {
+		yuan := float64(s.Total) / 100.0
+		if yuan > maxVal {
+			maxVal = yuan
+		}
+		// 日期只取 MM-DD
+		dateLabel := s.Date
+		if len(s.Date) > 5 {
+			dateLabel = s.Date[5:]
+		}
+		values = append(values, chart.Value{
+			Value: yuan,
+			Label: dateLabel,
+			Style: chart.Style{
+				FillColor:   drawing.Color{R: 54, G: 162, B: 235, A: 255},
+				StrokeColor: drawing.Color{R: 54, G: 162, B: 235, A: 255},
+				StrokeWidth: 1,
+			},
+		})
+	}
+
+	bar := chart.BarChart{
+		Title:  title,
+		Width:  600,
+		Height: 400,
+		TitleStyle: chart.Style{
+			FontSize: 16,
+		},
+		YAxis: chart.YAxis{
+			Range: &chart.ContinuousRange{
+				Min: 0,
+				Max: math.Ceil(maxVal*1.2/10) * 10,
+			},
+			ValueFormatter: func(v interface{}) string {
+				return fmt.Sprintf("%.0f", v)
+			},
+		},
+		BarWidth: 40,
+		Bars:     values,
+	}
+
+	buf := &bytes.Buffer{}
+	if err := bar.Render(chart.PNG, buf); err != nil {
+		return nil, fmt.Errorf("render bar chart: %w", err)
+	}
+	return buf.Bytes(), nil
+}

internal/qq/qq.go

@@ -102,6 +102,7 @@ func (b *QQBot) processAndReply(userID string, content string) string {
 			"📋 命令列表：\n" +
 			"• 记录/查看 — 最近10条\n" +
 			"• 今日/今天 — 今日汇总\n" +
+			"• 统计/报表 — 本月分类统计\n" +
 			"• 帮助 — 本帮助信息"
 
 	case isCommand(text, "查看", "记录", "列表", "list", "/list", "最近"):
@@ -136,6 +137,27 @@ func (b *QQBot) processAndReply(userID string, content string) string {
 		}
 		sb.WriteString(fmt.Sprintf("\n💰 共 %d 笔，合计 %.2f 元", len(items), float64(total)/100.0))
 		return sb.String()
+
+	case isCommand(text, "统计", "报表", "图表", "chart", "/chart"):
+		now := time.Now()
+		dateFrom := now.Format("2006-01") + "-01"
+		dateTo := now.Format("2006-01-02")
+		stats, err := b.finance.GetCategoryStats(DefaultUserID, dateFrom, dateTo)
+		if err != nil || len(stats) == 0 {
+			return fmt.Sprintf("📭 %d年%d月暂无消费数据", now.Year(), now.Month())
+		}
+		var sb strings.Builder
+		var grandTotal int64
+		var grandCount int
+		sb.WriteString(fmt.Sprintf("📊 %d年%d月消费统计：\n\n", now.Year(), now.Month()))
+		for _, s := range stats {
+			yuan := float64(s.Total) / 100.0
+			sb.WriteString(fmt.Sprintf("• %s：%.2f元（%d笔）\n", s.Category, yuan, s.Count))
+			grandTotal += s.Total
+			grandCount += s.Count
+		}
+		sb.WriteString(fmt.Sprintf("\n💰 共 %d 笔，合计 %.2f 元", grandCount, float64(grandTotal)/100.0))
+		return sb.String()
 	}
 
 	amount, category, err := b.finance.AddTransaction(DefaultUserID, text)

internal/service/finance.go

@@ -114,3 +114,41 @@ func (s *FinanceService) GetTransactionsByDate(userID int64, date string) ([]mod
 		Order("id desc").Find(&items).Error
 	return items, err
 }
+
+// CategoryStat 分类统计结果
+type CategoryStat struct {
+	Category string
+	Total    int64
+	Count    int
+}
+
+// GetCategoryStats 获取用户指定日期范围的分类统计
+func (s *FinanceService) GetCategoryStats(userID int64, dateFrom, dateTo string) ([]CategoryStat, error) {
+	var stats []CategoryStat
+	err := s.db.Model(&models.Transaction{}).
+		Select("category, SUM(amount) as total, COUNT(*) as count").
+		Where("user_id = ? AND date >= ? AND date <= ? AND is_deleted = ?", userID, dateFrom, dateTo, false).
+		Group("category").
+		Order("total desc").
+		Find(&stats).Error
+	return stats, err
+}
+
+// DailyStat 每日统计结果
+type DailyStat struct {
+	Date  string
+	Total int64
+	Count int
+}
+
+// GetDailyStats 获取用户指定日期范围的每日统计
+func (s *FinanceService) GetDailyStats(userID int64, dateFrom, dateTo string) ([]DailyStat, error) {
+	var stats []DailyStat
+	err := s.db.Model(&models.Transaction{}).
+		Select("date, SUM(amount) as total, COUNT(*) as count").
+		Where("user_id = ? AND date >= ? AND date <= ? AND is_deleted = ?", userID, dateFrom, dateTo, false).
+		Group("date").
+		Order("date asc").
+		Find(&stats).Error
+	return stats, err
+}