feat(bsp): V2 CPU 板引脚调整（LED1 PC4->PC5, LED2 PC5->PB0）

- LED1: PC4 -> PC5，Pull PULLUP->NOPULL，Speed HIGH->LOW
- LED2: PC5 -> PB0（新增输出），同上
- CH395F SPI2 仅标签口径互换：PB14=CH395F_SDI、PB15=CH395F_SDO；
  电气 AF 映射未变（PB14=SPI2_MISO 上拉，PB15=SPI2_MOSI）；删除宏 CH395F_SDOB15_Pin（已确认全工程无引用）
- 来源：CubeMX 6.18.1 依 CPU-V0.2 原理图调整并重新生成
- 本提交是可搬运的“引脚补丁”，后续 cherry-pick 到 ui-research 基座

STM32F407-Demo.ioc

@@ -120,7 +120,7 @@ Mcu.Pin26=PG8
 Mcu.Pin27=PA9
 Mcu.Pin28=PA10
 Mcu.Pin29=PA13
-Mcu.Pin3=PC4
+Mcu.Pin3=PC5
 Mcu.Pin30=PA14
 Mcu.Pin31=PC10
 Mcu.Pin32=PC11
@@ -131,7 +131,7 @@ Mcu.Pin36=PD2
 Mcu.Pin37=PD3
 Mcu.Pin38=PD4
 Mcu.Pin39=PD5
-Mcu.Pin4=PC5
+Mcu.Pin4=PB0
 Mcu.Pin40=PD6
 Mcu.Pin41=PD7
 Mcu.Pin42=PG9
@@ -160,8 +160,8 @@ Mcu.PinsNb=59
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F407ZGTx
-MxCube.Version=6.17.0
-MxDb.Version=DB.6.0.170
+MxCube.Version=6.18.1
+MxDb.Version=DB.6.0.181
 NVIC.BusFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false\:false
 NVIC.DMA1_Stream3_IRQn=true\:7\:0\:true\:false\:true\:true\:false\:true\:true
 NVIC.DMA1_Stream4_IRQn=true\:7\:0\:true\:false\:true\:true\:false\:true\:true
@@ -209,10 +209,13 @@ PA9.GPIO_PuPd=GPIO_NOPULL
 PA9.GPIO_Speed=GPIO_SPEED_FREQ_VERY_HIGH
 PA9.Mode=Asynchronous
 PA9.Signal=USART1_TX
-PB1.GPIOParameters=GPIO_Speed,PinState,GPIO_PuPd,GPIO_Label
+PB0.GPIOParameters=PinState,GPIO_Label
+PB0.GPIO_Label=LED2
+PB0.Locked=true
+PB0.PinState=GPIO_PIN_SET
+PB0.Signal=GPIO_Output
+PB1.GPIOParameters=PinState,GPIO_Label
 PB1.GPIO_Label=LED3
-PB1.GPIO_PuPd=GPIO_PULLUP
-PB1.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
 PB1.Locked=true
 PB1.PinState=GPIO_PIN_SET
 PB1.Signal=GPIO_Output
@@ -239,7 +242,7 @@ PB13.Locked=true
 PB13.Mode=Full_Duplex_Master
 PB13.Signal=SPI2_SCK
 PB14.GPIOParameters=GPIO_PuPd,GPIO_Label
-PB14.GPIO_Label=CH395F_SDO
+PB14.GPIO_Label=CH395F_SDI
 PB14.GPIO_PuPd=GPIO_PULLUP
 PB14.Locked=true
 PB14.Mode=Full_Duplex_Master
@@ -306,25 +309,19 @@ PC12.GPIO_Label=ST_TX4
 PC12.Locked=true
 PC12.Mode=Asynchronous
 PC12.Signal=UART5_TX
-PC4.GPIOParameters=GPIO_Speed,PinState,GPIO_PuPd,GPIO_Label
-PC4.GPIO_Label=LED1
-PC4.GPIO_PuPd=GPIO_PULLUP
-PC4.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
-PC4.Locked=true
-PC4.PinState=GPIO_PIN_SET
-PC4.Signal=GPIO_Output
-PC5.GPIOParameters=GPIO_Speed,PinState,GPIO_PuPd,GPIO_Label
-PC5.GPIO_Label=LED2
-PC5.GPIO_PuPd=GPIO_PULLUP
-PC5.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
+PC5.GPIOParameters=PinState,GPIO_Label
+PC5.GPIO_Label=LED1
 PC5.Locked=true
 PC5.PinState=GPIO_PIN_SET
 PC5.Signal=GPIO_Output
+PCC.Bar.Display=Horizontal Bar
 PCC.Checker=false
 PCC.Display=Plot\: All Steps
 PCC.Line=STM32F407/417
 PCC.MCU=STM32F407Z(E-G)Tx
 PCC.PartNumber=STM32F407ZGTx
+PCC.SequenceTime=1.0 ms
+PCC.SequenceTime.Unit=ms
 PCC.Series=STM32F4
 PCC.Temperature=25
 PCC.Vdd=3.3