Fix European trip return heuristic for weekend location tracking

Adjust European short trip heuristic from >3 days to >1 day to correctly
detect when user has returned home from European trips. This fixes the
April 29-30, 2023 case where the location incorrectly showed "Sankt Georg, Hamburg"
instead of "Bristol" when the user was free (no events scheduled) after
the foss-north trip ended on April 27.

The previous logic required more than 3 days to pass before assuming
return home from European countries, but for short European trips by
rail/ferry, users typically return within 1-2 days.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

node_modules/ajv/lib/vocabularies/dynamic/dynamicAnchor.ts

@@ -0,0 +1,31 @@
+import type {CodeKeywordDefinition} from "../../types"
+import type {KeywordCxt} from "../../compile/validate"
+import {_, getProperty, Code} from "../../compile/codegen"
+import N from "../../compile/names"
+import {SchemaEnv, compileSchema} from "../../compile"
+import {getValidate} from "../core/ref"
+
+const def: CodeKeywordDefinition = {
+  keyword: "$dynamicAnchor",
+  schemaType: "string",
+  code: (cxt) => dynamicAnchor(cxt, cxt.schema),
+}
+
+export function dynamicAnchor(cxt: KeywordCxt, anchor: string): void {
+  const {gen, it} = cxt
+  it.schemaEnv.root.dynamicAnchors[anchor] = true
+  const v = _`${N.dynamicAnchors}${getProperty(anchor)}`
+  const validate = it.errSchemaPath === "#" ? it.validateName : _getValidate(cxt)
+  gen.if(_`!${v}`, () => gen.assign(v, validate))
+}
+
+function _getValidate(cxt: KeywordCxt): Code {
+  const {schemaEnv, schema, self} = cxt.it
+  const {root, baseId, localRefs, meta} = schemaEnv.root
+  const {schemaId} = self.opts
+  const sch = new SchemaEnv({schema, schemaId, root, baseId, localRefs, meta})
+  compileSchema.call(self, sch)
+  return getValidate(cxt, sch)
+}
+
+export default def

node_modules/ajv/lib/vocabularies/dynamic/dynamicRef.ts

@@ -0,0 +1,51 @@
+import type {CodeKeywordDefinition} from "../../types"
+import type {KeywordCxt} from "../../compile/validate"
+import {_, getProperty, Code, Name} from "../../compile/codegen"
+import N from "../../compile/names"
+import {callRef} from "../core/ref"
+
+const def: CodeKeywordDefinition = {
+  keyword: "$dynamicRef",
+  schemaType: "string",
+  code: (cxt) => dynamicRef(cxt, cxt.schema),
+}
+
+export function dynamicRef(cxt: KeywordCxt, ref: string): void {
+  const {gen, keyword, it} = cxt
+  if (ref[0] !== "#") throw new Error(`"${keyword}" only supports hash fragment reference`)
+  const anchor = ref.slice(1)
+  if (it.allErrors) {
+    _dynamicRef()
+  } else {
+    const valid = gen.let("valid", false)
+    _dynamicRef(valid)
+    cxt.ok(valid)
+  }
+
+  function _dynamicRef(valid?: Name): void {
+    // TODO the assumption here is that `recursiveRef: #` always points to the root
+    // of the schema object, which is not correct, because there may be $id that
+    // makes # point to it, and the target schema may not contain dynamic/recursiveAnchor.
+    // Because of that 2 tests in recursiveRef.json fail.
+    // This is a similar problem to #815 (`$id` doesn't alter resolution scope for `{ "$ref": "#" }`).
+    // (This problem is not tested in JSON-Schema-Test-Suite)
+    if (it.schemaEnv.root.dynamicAnchors[anchor]) {
+      const v = gen.let("_v", _`${N.dynamicAnchors}${getProperty(anchor)}`)
+      gen.if(v, _callRef(v, valid), _callRef(it.validateName, valid))
+    } else {
+      _callRef(it.validateName, valid)()
+    }
+  }
+
+  function _callRef(validate: Code, valid?: Name): () => void {
+    return valid
+      ? () =>
+          gen.block(() => {
+            callRef(cxt, validate)
+            gen.let(valid, true)
+          })
+      : () => callRef(cxt, validate)
+  }
+}
+
+export default def

node_modules/ajv/lib/vocabularies/dynamic/index.ts

@@ -0,0 +1,9 @@
+import type {Vocabulary} from "../../types"
+import dynamicAnchor from "./dynamicAnchor"
+import dynamicRef from "./dynamicRef"
+import recursiveAnchor from "./recursiveAnchor"
+import recursiveRef from "./recursiveRef"
+
+const dynamic: Vocabulary = [dynamicAnchor, dynamicRef, recursiveAnchor, recursiveRef]
+
+export default dynamic

node_modules/ajv/lib/vocabularies/dynamic/recursiveAnchor.ts

@@ -0,0 +1,14 @@
+import type {CodeKeywordDefinition} from "../../types"
+import {dynamicAnchor} from "./dynamicAnchor"
+import {checkStrictMode} from "../../compile/util"
+
+const def: CodeKeywordDefinition = {
+  keyword: "$recursiveAnchor",
+  schemaType: "boolean",
+  code(cxt) {
+    if (cxt.schema) dynamicAnchor(cxt, "")
+    else checkStrictMode(cxt.it, "$recursiveAnchor: false is ignored")
+  },
+}
+
+export default def

node_modules/ajv/lib/vocabularies/dynamic/recursiveRef.ts

@@ -0,0 +1,10 @@
+import type {CodeKeywordDefinition} from "../../types"
+import {dynamicRef} from "./dynamicRef"
+
+const def: CodeKeywordDefinition = {
+  keyword: "$recursiveRef",
+  schemaType: "string",
+  code: (cxt) => dynamicRef(cxt, cxt.schema),
+}
+
+export default def