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refactor(time_sync)!: 退役 TCP :8888 对时任务，timeSyncTask 转纯 SNTP 校时节拍宿主（#78）
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SNTP 客户端已随 #73/PR #77 上线合入（merge 2b848c4a），用户裁定
8888 对时任务退出历史舞台（gitea:77 线程原话，跟踪 Issue #78）。

生产侧（App/sync/time_sync.c v2.0，任务入口名不变，freertos.c 零改动）：
- 删除 :8888 监听、TIME 包重组、sys_clock 写入、OPER 落痕、
  net_drop_conn 队头自救整条链（TIME_SYNC_PORT 宏随退役删除）
- 任务体收敛为：就绪屏障（100ms 分片、osFlagsNoClear）→
  200ms 校时节拍 task_wd_beat → time_sntp_run(net_get_generation())
  → 分片延时；喂狗节奏（TASK_WD_TIMESYNC=5，required_mask）不变
- 时钟写入口自此 = SNTP / UI 手工 / 104 C_CS，双写竞态（后写者赢）
  随之消失（墙钟说明 §15 退役公告、§16 现势口径）

工具与测试：
- 删除 test/host/time_sync_server.py（对时源）与 e02_probe.py
  （队头阻塞探针，载体随监听退役；判据脚本 v5_log_gap_report.py
  保留供旧日志解读）
- time_sync 主机单测重写 v2.0：33 断言覆盖分片延时 / 屏障 /
  SNTP 节拍与网络代次当轮交接 / 未出网守门；stub 的
  net_socket.h 裁剪至 net_get_generation 作编译期绊线
- 覆盖率基线 --update-baseline 收口（time_sync.c 101→20 行为刻意
  缩减，全仓 48/48 套绿）

文档与图：墙钟说明 §15 改退役公告（教训保留：CH395F FIN 丢未读
缓冲）、§16 单一网络来源；产品需求 FR-TIME-2 退役注记、§6.3 重写；
架构总览 / 软件架构规格 / 网络配置 / 网络自愈 §9.3 / BSD 指南 /
看门狗说明心跳与白名单行 / 实机测试指南 / 部署环境 / 继保规划 /
UI补齐时基口径 / 页面补齐规划 SNTP 页行 / 任务规划 README 叶数与
暂缓项行（SNTP 叶已绑、UI_PAGE_MAP_COUNT=31 口径）等约 30 处现势
口径同步；arch / net_stack 两图生成器与 SVG 同笔重跑。

台账：ram_baseline --update + check_mem_numbers --write + 体积凭证
（Code 254,648→253,428，−1,220 B）。静态链复测发现 timeSyncTask
1,904 B / iec104Task 1,600 B 低于 ISR 硬线：master 2b848c4a 同判据
timeSyncTask 即 2,056 B（本 PR 只减不增，−152 B 旧任务自身帧），
双 FAIL 为 #74/#77 后既有债；抬栈属 Ask-first 未擅自执行，登记簿
新增「静态链硬线双 FAIL」待台架复采，复测快照入 docs/内存管理/data。

验证：keil-build 0 错 0 警；time_sync/sntp 主机单测绿；
ci_local 全绿；doc-links --all 0。
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Side by Side Swipe Overlay

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docs/images/项目架构总览.svg
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<text x="26" y="62" font-size="13" fill="#64748b">STM32F407ZGTx @168MHz · FreeRTOS V10.3.1 (CMSIS-RTOS2) · 上层只依赖相邻下层</text>
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<text x="288" y="139" font-size="13" fill="#1e293b" text-anchor="middle">net_cfg（网口配置：IP/掩码/网关/MAC · /config.ini [network] 段）</text>
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<text x="44" y="240" font-size="17" font-weight="700" fill="#7c3aed">② UI 层</text>
<text x="129" y="240" font-size="12" fill="#64748b">Drivers/BSP/UI · 一份显存三出（模拟器/屏板/远程）</text>
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<text x="530" y="419" font-size="13" fill="#1e293b" text-anchor="middle">ui_deco（浅 V 装饰）</text>
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<text x="811" y="240" font-size="17" font-weight="700" fill="#0d9488">③ 基础服务层</text>
<text x="935" y="240" font-size="12" fill="#64748b">应用侧服务 / 编排</text>
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<text x="1193" y="467" font-size="13" fill="#1e293b" text-anchor="middle">lftpd（FTP :21）</text>
<rect x="1277" y="444" width="227" height="38" rx="8" fill="#ffffff" stroke="#0d9488" stroke-opacity="0.55"/>
<text x="1391" y="467" font-size="13" fill="#1e293b" text-anchor="middle">time_sync（TCP 对时 :8888）</text>
<rect x="26" y="542" width="1508" height="140" rx="12" fill="#f0fdf4" stroke="#16a34a" stroke-opacity="0.45"/>
<text x="44" y="568" font-size="17" font-weight="700" fill="#16a34a">④ 中间件层</text>
<text x="151" y="568" font-size="12" fill="#64748b">通用库 / 协议栈</text>
<rect x="44" y="580" width="675" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="381" y="603" font-size="13" fill="#1e293b" text-anchor="middle">net_socket / net_select / net_events / net_listener / net_pending（BSD API + 阻塞模型）</text>
<rect x="729" y="580" width="147" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="803" y="603" font-size="13" fill="#1e293b" text-anchor="middle">FatFs（文件系统）</text>
<rect x="887" y="580" width="186" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="980" y="603" font-size="13" fill="#1e293b" text-anchor="middle">nand_ftl（dhara FTL）</text>
<rect x="1083" y="580" width="164" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="1165" y="603" font-size="13" fill="#1e293b" text-anchor="middle">LVGL v9.3（图形库）</text>
<rect x="1258" y="580" width="177" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="1347" y="603" font-size="13" fill="#1e293b" text-anchor="middle">sys_clock（墙钟基准）</text>
<rect x="44" y="628" width="219" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="153" y="651" font-size="13" fill="#1e293b" text-anchor="middle">task_watchdog（IWDG 判定）</text>
<rect x="26" y="726" width="1508" height="92" rx="12" fill="#fffbeb" stroke="#d97706" stroke-opacity="0.45"/>
<text x="44" y="752" font-size="17" font-weight="700" fill="#d97706">⑤ 驱动层</text>
<text x="134" y="752" font-size="12" fill="#64748b">Drivers/BSP · 芯片时序/中断</text>
<rect x="44" y="764" width="178" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="133" y="787" font-size="13" fill="#1e293b" text-anchor="middle">ch395f（SPI2 + DMA）</text>
<rect x="232" y="764" width="163" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="314" y="787" font-size="13" fill="#1e293b" text-anchor="middle">gd5f2gq5ue（SPI1）</text>
<rect x="406" y="764" width="195" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="503" y="787" font-size="13" fill="#1e293b" text-anchor="middle">tpafe5160（并行 16 位）</text>
<rect x="611" y="764" width="133" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="677" y="787" font-size="13" fill="#1e293b" text-anchor="middle">sd2506（I2C1）</text>
<rect x="754" y="764" width="171" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="840" y="787" font-size="13" fill="#1e293b" text-anchor="middle">rs485（UART4 + DE）</text>
<rect x="935" y="764" width="388" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="1130" y="787" font-size="13" fill="#1e293b" text-anchor="middle">sb_link · sb_proto（屏板链路 · USART1 700 kbaud）</text>
<rect x="26" y="862" width="1508" height="92" rx="12" fill="#f1f5f9" stroke="#475569" stroke-opacity="0.45"/>
<text x="44" y="888" font-size="17" font-weight="700" fill="#475569">⑥ 内核 / HAL</text>
<text x="176" y="888" font-size="12" fill="#64748b">调度 · 外设抽象</text>
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<text x="208" y="923" font-size="13" fill="#1e293b" text-anchor="middle">FreeRTOS V10.3.1（CMSIS-RTOS2 · heap_4）</text>
<rect x="383" y="900" width="189" height="38" rx="8" fill="#ffffff" stroke="#475569" stroke-opacity="0.55"/>
<text x="478" y="923" font-size="13" fill="#1e293b" text-anchor="middle">STM32 HAL（时基 TIM7）</text>
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<text x="655" y="923" font-size="13" fill="#1e293b" text-anchor="middle">CMSIS / 启动文件</text>
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<text x="44" y="1024" font-size="17" font-weight="700" fill="#e11d48">⑦ 硬件</text>
<text x="117" y="1024" font-size="12" fill="#64748b">STM32F407ZGTx @168MHz</text>
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<text x="133" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">CH395F 以太网（SPI2）</text>
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<text x="334" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">GD5F2GQ5UE NAND（SPI1）</text>
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<text x="536" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">TPAFE5160 ADC（并行）</text>
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<text x="718" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">SD2506 RTC（I2C1）</text>
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<text x="912" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">RS-485（UART4 · 未接线）</text>
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<text x="1133" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">屏板（USART1 · 700 kbaud）</text>
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<text x="1377" y="1059" font-size="13" fill="#1e293b" text-anchor="middle">RS232#1 日志（UART5 · 115200）</text>
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<text x="82" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">6x LED</text>
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<text x="988" y="515" font-size="13" fill="#1e293b" text-anchor="middle">time_sntp（SNTP 对时，UDP 出向；:8888 已退役）</text>
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<text x="44" y="616" font-size="17" font-weight="700" fill="#16a34a">④ 中间件层</text>
<text x="151" y="616" font-size="12" fill="#64748b">通用库 / 协议栈</text>
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<text x="381" y="651" font-size="13" fill="#1e293b" text-anchor="middle">net_socket / net_select / net_events / net_listener / net_pending（BSD API + 阻塞模型）</text>
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<text x="803" y="651" font-size="13" fill="#1e293b" text-anchor="middle">FatFs（文件系统）</text>
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<text x="980" y="651" font-size="13" fill="#1e293b" text-anchor="middle">nand_ftl（dhara FTL）</text>
<rect x="1083" y="628" width="164" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="1165" y="651" font-size="13" fill="#1e293b" text-anchor="middle">LVGL v9.3（图形库）</text>
<rect x="1258" y="628" width="177" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="1347" y="651" font-size="13" fill="#1e293b" text-anchor="middle">sys_clock（墙钟基准）</text>
<rect x="44" y="676" width="219" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="153" y="699" font-size="13" fill="#1e293b" text-anchor="middle">task_watchdog（IWDG 判定）</text>
<rect x="26" y="774" width="1508" height="92" rx="12" fill="#fffbeb" stroke="#d97706" stroke-opacity="0.45"/>
<text x="44" y="800" font-size="17" font-weight="700" fill="#d97706">⑤ 驱动层</text>
<text x="134" y="800" font-size="12" fill="#64748b">Drivers/BSP · 芯片时序/中断</text>
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<text x="133" y="835" font-size="13" fill="#1e293b" text-anchor="middle">ch395f（SPI2 + DMA）</text>
<rect x="232" y="812" width="163" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="314" y="835" font-size="13" fill="#1e293b" text-anchor="middle">gd5f2gq5ue（SPI1）</text>
<rect x="406" y="812" width="195" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="503" y="835" font-size="13" fill="#1e293b" text-anchor="middle">tpafe5160（并行 16 位）</text>
<rect x="611" y="812" width="133" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="677" y="835" font-size="13" fill="#1e293b" text-anchor="middle">sd2506（I2C1）</text>
<rect x="754" y="812" width="171" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="840" y="835" font-size="13" fill="#1e293b" text-anchor="middle">rs485（UART4 + DE）</text>
<rect x="935" y="812" width="388" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="1130" y="835" font-size="13" fill="#1e293b" text-anchor="middle">sb_link · sb_proto（屏板链路 · USART1 700 kbaud）</text>
<rect x="26" y="910" width="1508" height="92" rx="12" fill="#f1f5f9" stroke="#475569" stroke-opacity="0.45"/>
<text x="44" y="936" font-size="17" font-weight="700" fill="#475569">⑥ 内核 / HAL</text>
<text x="176" y="936" font-size="12" fill="#64748b">调度 · 外设抽象</text>
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<text x="208" y="971" font-size="13" fill="#1e293b" text-anchor="middle">FreeRTOS V10.3.1（CMSIS-RTOS2 · heap_4）</text>
<rect x="383" y="948" width="189" height="38" rx="8" fill="#ffffff" stroke="#475569" stroke-opacity="0.55"/>
<text x="478" y="971" font-size="13" fill="#1e293b" text-anchor="middle">STM32 HAL（时基 TIM7）</text>
<rect x="582" y="948" width="144" height="38" rx="8" fill="#ffffff" stroke="#475569" stroke-opacity="0.55"/>
<text x="655" y="971" font-size="13" fill="#1e293b" text-anchor="middle">CMSIS / 启动文件</text>
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<text x="44" y="1072" font-size="17" font-weight="700" fill="#e11d48">⑦ 硬件</text>
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<text x="133" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">CH395F 以太网（SPI2）</text>
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<text x="334" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">GD5F2GQ5UE NAND（SPI1）</text>
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<text x="536" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">TPAFE5160 ADC（并行）</text>
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<text x="718" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">SD2506 RTC（I2C1）</text>
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<text x="912" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">RS-485（UART4 · 未接线）</text>
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<text x="1133" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">屏板（USART1 · 700 kbaud）</text>
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<text x="1377" y="1107" font-size="13" fill="#1e293b" text-anchor="middle">RS232#1 日志（UART5 · 115200）</text>
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<text x="82" y="1155" font-size="13" fill="#1e293b" text-anchor="middle">6x LED</text>
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<text x="26" y="1174" font-size="12" fill="#94a3b8">上层只依赖相邻下层（单向）；UI 层与基础服务层同级并列，均使用顶层 net_cfg。跨层调用细节见 docs/架构设计/项目架构总览.md §1.2</text>
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<text x="26" y="1222" font-size="12" fill="#94a3b8">上层只依赖相邻下层（单向）；UI 层与基础服务层同级并列，均使用顶层 net_cfg。跨层调用细节见 docs/架构设计/项目架构总览.md §1.2</text>
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