chore(release): bump version to 1.17.0

Cuts the 65 UI/UX v3 commits accumulated since v1.16.0 (High Contrast
scheme, window backdrop materials, InfoBar stack, measured-width
migrations) into a release. Updates CHANGELOG.md Unreleased -> 1.17.0
and docs/PRODUCT.md's review timestamp per the minor-release checklist.

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.17.0] - 2026-08-30
+
 ### Added
 - New built-in **High Contrast** colour scheme (`colors = "highcontrast"`), the
   first scheme to target WCAG **AAA**: a pure black ground, pure white text, and

Cargo.lock

@@ -20,7 +20,7 @@ exclude = [
 resolver = "2"
 
 [workspace.package]
-version = "1.16.0"
+version = "1.17.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 authors = []

Cargo.toml

@@ -1,7 +1,7 @@
 # Nexterm Product Requirements
 
 - Status: living document, reviewed at each minor/major release (alongside `CHANGELOG.md`)
-- Last reviewed: 2026-07-31 (v1.16.0)
+- Last reviewed: 2026-08-30 (v1.17.0)
 - Owner: @mizu-jun
 
 This document defines **what Nexterm is and why** — vision, target users, product