Initial TrueGrowth source import

openspec/changes/archive/2026-04-29-add-english-home-seo-page/proposal.md

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+# Change: Add English SEO homepage
+
+## Why
+The current SEO homepage is Chinese-only, so it cannot directly rank for English search intent such as open-source AI canvas, AI image generation workspace, and AI whiteboard.
+
+## What Changes
+- Add an English static SEO homepage at `/en/home.html`.
+- Add bidirectional `hreflang` metadata between the Chinese and English homepages.
+- Keep each localized homepage self-canonical to avoid consolidating the English page into the Chinese URL.
+- Add the English homepage to the XML sitemap.
+
+## Impact
+- Affected specs: `seo-homepage`
+- Affected code: `apps/web/public/home.html`, `apps/web/public/en/home.html`, `apps/web/public/sitemap.xml`

openspec/changes/archive/2026-04-29-add-english-home-seo-page/specs/seo-homepage/spec.md

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+## ADDED Requirements
+
+### Requirement: Localized SEO homepage
+The site SHALL provide an English SEO homepage with localized visible content, metadata, structured data, and a self-referencing canonical URL.
+
+#### Scenario: English homepage is crawlable
+- **WHEN** a crawler requests `/en/home.html`
+- **THEN** the response contains an English HTML document
+- **AND** the document declares `lang="en"`
+- **AND** the document includes indexable metadata and structured data for OpenTu
+- **AND** the canonical URL points to `https://opentu.ai/en/home.html`
+
+### Requirement: Localized homepage alternates
+The localized SEO homepages SHALL expose reciprocal alternate-language links.
+
+#### Scenario: Chinese and English homepages declare alternates
+- **WHEN** a crawler reads either `/home.html` or `/en/home.html`
+- **THEN** the document declares alternates for `zh-CN`, `en`, and `x-default`
+- **AND** each localized document keeps its own self-referencing canonical URL
+
+### Requirement: Localized homepage discovery
+The XML sitemap SHALL include the English homepage and its localized alternate relationship.
+
+#### Scenario: Sitemap lists localized homepages
+- **WHEN** a crawler reads `/sitemap.xml`
+- **THEN** the sitemap includes `https://opentu.ai/en/home.html`
+- **AND** the Chinese and English homepage entries include reciprocal localized alternates

openspec/changes/archive/2026-04-29-add-english-home-seo-page/tasks.md

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+## 1. Implementation
+- [x] 1.1 Add English static homepage content and metadata
+- [x] 1.2 Add `hreflang` and social locale metadata to the Chinese homepage
+- [x] 1.3 Add the English homepage to `sitemap.xml`
+- [x] 1.4 Validate OpenSpec and static SEO structure