refactor: 移除 context-mode，Chrome 快照改为直接返回

context-mode 的 ctx_execute 系工具以真实 shell 执行且权限为 allow，绕过了
bash 策略与 protectedWrites；其每轮注入、独立 MCP 子进程与 skills 也与组合包
提示词单一所有权冲突。大输出职责已由 pi-overflow（入口截断）与
pi-compaction（压力遮蔽）承担：
- 删除 context-mode 依赖、wrapper/过滤器、skills，以及 ctx_* 的权限、
  tools.jsonc、路由规则、tool-search 常驻与 4 个分组
- better-sqlite3@12 仅为 context-mode 传递依赖，随之移除根 allowScripts
- pi-chrome：按用户决定移除快照隐私规则与 .pi/chrome-context 临时文件机制，
  快照 JSON 直接作为工具结果返回、details 只留小型元数据，超长由 pi-overflow
  截断并用 overflow_query 提取；授权生命周期不变

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

pi-chrome/test/snapshot-result.test.ts

@@ -0,0 +1,48 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import {
+	CHROME_TOOL_NAMES,
+	formatActionResultText,
+	formatChromeFindMatches,
+	snapshotStats,
+} from "../extensions/chrome-profile-bridge/index.ts";
+
+test("formatActionResultText appends the inline snapshot JSON", () => {
+	const snapshot = { elements: [{ uid: "el-1", role: "button", label: "Save" }], matches: [] };
+	const text = formatActionResultText("Clicked el-1", snapshot);
+	const [summary, json] = text.split("\n\n");
+	assert.equal(summary, "Clicked el-1");
+	assert.deepEqual(JSON.parse(json), snapshot);
+});
+
+test("formatActionResultText returns the summary alone without a snapshot", () => {
+	assert.equal(formatActionResultText("Clicked el-1", undefined), "Clicked el-1");
+});
+
+test("snapshotStats stays small: only element and match counts", () => {
+	assert.deepEqual(
+		snapshotStats({ elements: [{ uid: "a" }, { uid: "b" }], matches: [{ uid: "a" }] }),
+		{ elementCount: 2, matchCount: 1 },
+	);
+	assert.deepEqual(snapshotStats({ elements: "nope" }), { elementCount: 0, matchCount: 0 });
+	assert.deepEqual(snapshotStats(undefined), { elementCount: 0, matchCount: 0 });
+	assert.deepEqual(snapshotStats([1, 2, 3]), { elementCount: 0, matchCount: 0 });
+});
+
+test("chrome_find formatting is capped and authorization tracks all 21 tools", () => {
+	const matches = Array.from({ length: 25 }, (_, index) => ({
+		kind: "element",
+		uid: `el-${index}`,
+		role: "button",
+		label: `Button ${index}`,
+		rect: { x: index, y: index, width: 10, height: 10 },
+	}));
+	const text = formatChromeFindMatches({ query: "button", matches });
+
+	assert.match(text, /el-0/);
+	assert.match(text, /el-19/);
+	assert.doesNotMatch(text, /el-20/);
+	assert.equal(CHROME_TOOL_NAMES.length, 21);
+	assert.ok(CHROME_TOOL_NAMES.includes("chrome_find"));
+	assert.ok(CHROME_TOOL_NAMES.includes("chrome_inspect"));
+});