docs: reposition as open-source embeddable engine, remove 'personal project' wording

- README: 'Personal open-source' → 'Open-source embeddable engine for AI agents, enterprises, and developers'
- ROADMAP: update release posture and maintenance status wording
- Clarify the engine is designed for enterprise/team/individual integration

Author: lijunliu-gh

README.md

@@ -14,14 +14,14 @@
   <a href="CONTRIBUTING.md"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs Welcome"></a>
 </p>
 
-Personal open-source PowerPoint generation engine — built to be called by AI agents.
+Open-source PowerPoint generation engine — built to be embedded by AI agents, enterprises, and developers.
 
 Create and revise `.pptx` decks from natural language through MCP, CLI, or HTTP. Best suited for developers, AI workflow builders, and technical teams.
 
-> Status: beta-quality personal project.
+> Status: beta-quality open-source engine.
 > Not a SaaS. Not a polished end-user GUI.
-> This repository is an embeddable engine for agent workflows and internal automation.
-> Current scope is considered complete for this personal release; no additional roadmap items are currently committed.
+> This repository is an embeddable backend for agent workflows, enterprise automation, and custom integrations.
+> Current scope is considered feature-complete; future updates focus on bug fixes and community contributions.
 
 ### Who is this for?
 

ROADMAP.md

@@ -4,7 +4,7 @@ Current version: **v0.7.8**
 
 Product positioning: **to-B PPT generation engine** — embeddable into enterprise AI workflows with private deployment, API-driven generation (MCP / CLI / HTTP), and multi-language support (CJK + English). Core differentiators are data security (no data leaves the enterprise), content intelligence (AI-driven layout and visualization selection), and cross-platform output (PowerPoint, Keynote, Google Slides).
 
-Current release posture: **published in its current scope**. This repository is being released as a personal open-source project in maintenance mode. No additional roadmap items are currently committed.
+Current release posture: **published in its current scope**. This is an open-source embeddable engine designed for integration into enterprise, team, or individual AI workflows. Future updates focus on bug fixes and community contributions.
 
 ---
 
@@ -31,10 +31,10 @@ Current release posture: **published in its current scope**. This repository is
 
 ## Maintenance Status
 
-This repository is published as a stable personal-project snapshot.
+This repository is published as a stable, self-hostable engine.
 
-- No additional feature roadmap is currently committed
-- Future updates, if any, are expected to be limited to bug fixes, small documentation corrections, or metadata cleanup
+- Current scope is feature-complete
+- Future updates focus on bug fixes, documentation improvements, and community contributions
 - The recommended way to evaluate the project is to use the current CLI, MCP, HTTP, and JSON skill entrypoints as documented
 
 ---
@@ -44,9 +44,9 @@ This repository is published as a stable personal-project snapshot.
 | Version | Milestone |
 |---------|-----------|
 | v0.7.8 | Fix text/background contrast across all themes; WCAG luminance-aware rendering |
-| v0.7.7 | Current-scope release alignment; roadmap converted to project status / maintenance posture |
+| v0.7.7 | Release posture alignment; roadmap converted to project status document |
 | v0.7.6 | Release metadata audit cleanup and public baseline verification |
-| v0.7.5 | README positioning update for personal-project release |
+| v0.7.5 | README positioning update for open-source release |
 | v0.7.4 | Switch to Apache 2.0 license |
 | v0.7.3 | 409 tests, 84% coverage, documentation alignment |
 | v0.7.2 | Theme system, 6 built-in themes, new layouts (KPI, SWOT, funnel), brand template adaptation |