From e07d472dd1659a1f66a5b2f741a4ab69f87bb318 Mon Sep 17 00:00:00 2001
From: leon <916117771@qq.com>
Date: Sat, 2 May 2026 15:36:48 +0800
Subject: [PATCH] =?UTF-8?q?docs(quick):=20=E5=AE=8C=E6=88=90=E5=B0=BE?=
 =?UTF-8?q?=E9=A6=96=E6=A6=82=E7=8E=87=E5=88=86=E6=9E=90=E5=BC=B9=E7=AA=97?=
 =?UTF-8?q?=20quick=20task?=
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---
 .planning/STATE.md                            |  2 ++
 .../260502-ljh-history/260502-ljh-PLAN.md     | 20 ++++++++++++++++++
 .../260502-ljh-history/260502-ljh-SUMMARY.md  | 21 +++++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 .planning/quick/260502-ljh-history/260502-ljh-PLAN.md
 create mode 100644 .planning/quick/260502-ljh-history/260502-ljh-SUMMARY.md

diff --git a/.planning/STATE.md b/.planning/STATE.md
index 582b56b..067d8c9 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -85,6 +85,8 @@ None yet.
 | 260424-roj | 在history页面新增特码冷热查询功能 | 2026-04-24 | 2513bbb | [260424-roj](./quick/260424-roj-history-y/) |
 | 260425-w2i | 在控制台页面新增区域转移概率统计功能 | 2026-04-25 | 28415a1 | [260425-w2i](./quick/260425-w2i-5-10/) |
 
+| 260502-ljh | 在history页面新增尾首概率分析弹窗 | 2026-05-02 | 919fbbc | [260502-ljh](./quick/260502-ljh-history/) |
+
 ## Deferred Items
 
 | Category | Item | Status | Deferred At |
diff --git a/.planning/quick/260502-ljh-history/260502-ljh-PLAN.md b/.planning/quick/260502-ljh-history/260502-ljh-PLAN.md
new file mode 100644
index 0000000..34d00c2
--- /dev/null
+++ b/.planning/quick/260502-ljh-history/260502-ljh-PLAN.md
@@ -0,0 +1,20 @@
+---
+title: "在history页面新增一个弹窗，显示：下一期尾数与前一期尾数相同的概率、下一期首位与前一期首位相同的概率"
+mode: quick
+status: in-progress
+tasks_count: 3
+created: 2026-05-02
+---
+
+## Plan
+
+### Task 1: 后端新增接口
+- File: `application/admin/controller/History.php` — 新增 `tailHeadProbability` 方法
+- File: `application/admin/model/History.php` — 新增 `getTailHeadProbability` 方法
+- 逻辑：查询全部历史数据（按 openTime 升序），逐期对比相邻两期的尾数和首位，统计相同概率
+
+### Task 2: 前端添加工具栏按钮
+- File: `application/admin/view/history/index.html` — 在工具栏添加"尾首概率"按钮
+
+### Task 3: 前端弹窗逻辑
+- File: `public/assets/js/backend/history.js` — 新增按钮点击事件 + `showTailHeadProbabilityDialog` 方法
diff --git a/.planning/quick/260502-ljh-history/260502-ljh-SUMMARY.md b/.planning/quick/260502-ljh-history/260502-ljh-SUMMARY.md
new file mode 100644
index 0000000..c71b1cc
--- /dev/null
+++ b/.planning/quick/260502-ljh-history/260502-ljh-SUMMARY.md
@@ -0,0 +1,21 @@
+---
+title: "在history页面新增一个弹窗，显示：下一期尾数与前一期尾数相同的概率、下一期首位与前一期首位相同的概率"
+mode: quick
+status: complete
+date: 2026-05-02
+---
+
+## Summary
+
+Completed quick task: Added a "尾首概率" (Tail-Head Probability) dialog to the history page.
+
+### Changes
+- `application/admin/model/History.php` — Added `getTailHeadProbability()` method that analyzes consecutive period transitions of the special code (num7), calculating the probability of tail (ones digit) and head (tens digit) remaining the same
+- `application/admin/controller/History.php` — Added `tailHeadProb` endpoint + added to `$noNeedRight`
+- `application/admin/view/history/index.html` — Added toolbar button with `btn-tailheadprob` class
+- `public/assets/js/backend/history.js` — Added click handler + `showTailHeadProbabilityDialog()` with period selector (30/50/100/200)
+
+### Implementation details
+- Tail = num % 10 (个位), Head = floor(num / 10) (十位)
+- Only counts valid transitions (both numbers in 1-49 range)
+- Displays probability as percentage with period count and transition count