Rename remaining EditmaskwithAI references to PaintPlus

Updates README, Docker/Compose comments and container name, install
script banner, about dialog GitHub link, and a script's cd path to
match the repo's new name.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011g84QwMKwPMFQPwLVnPrQ1

README.md

@@ -1,4 +1,4 @@
-# EditmaskwithAI
+# PaintPlus
 
 A self-hosted, web-based AI photo editor. Paint over any object, describe what you want, and the AI replaces just that region — every pixel outside your selection stays untouched.
 
@@ -7,8 +7,8 @@ A self-hosted, web-based AI photo editor. Paint over any object, describe what y
 ### GPU machine (recommended — free inference, best quality)
 
 ```bash
-git clone https://github.com/outis1one/editmaskwithai
-cd editmaskwithai
+git clone https://github.com/outis1one/paintplus
+cd paintplus
 
 # One-time setup: installs nvidia-container-toolkit, configures Docker,
 # sets up a permanent DNS fix, and prefetches all AI models on the host.
@@ -29,8 +29,8 @@ Open **http://localhost:3080**
 ### Cloud API (no GPU required)
 
 ```bash
-git clone https://github.com/outis1one/editmaskwithai
-cd editmaskwithai
+git clone https://github.com/outis1one/paintplus
+cd paintplus
 cp .env.example .env
 # Edit .env: set AI_PROVIDER and your API key (see .env.example for options)
 docker compose up -d --build
@@ -140,7 +140,7 @@ docker compose logs -f
 ## File structure
 
 ```
-EditmaskwithAI/
+PaintPlus/
 ├── backend/
 │   ├── app/
 │   │   ├── routers/         # API endpoints (ai_tools, print_tools, …)