Move fork home to git.us-ea.st

Repointed every reference (footer link, request User-Agent, README
clone instruction) from git.pka.world/butler/grin-explorer to
git.us-ea.st/butler/grin-explorer — same Gitea instance, same creds,
just the canonical hostname for this project.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -17,7 +17,7 @@ Grin is the very first, simple and fair MimbleWimble blockchain implementation.
 
 ## Installation
 
-1. Clone repository: `git clone https://git.pka.world/butler/grin-explorer.git`
+1. Clone repository: `git clone https://git.us-ea.st/butler/grin-explorer.git`
 2. Build explorer:
    ```
    cd grin-explorer

src/requests.rs

@@ -244,7 +244,7 @@ pub async fn get_market(dashboard: Arc<Mutex<Dashboard>>) -> Result<(), anyhow::
     if CONFIG.coingecko_api == "enabled" && count % 20 == 0 {
         client = reqwest::Client::new();
         result = client.get("https://api.coingecko.com/api/v3/simple/price?ids=grin&vs_currencies=usd%2Cbtc&include_24hr_vol=true")
-                       .header("User-Agent", "https://git.pka.world/butler/grin-explorer")
+                       .header("User-Agent", "https://git.us-ea.st/butler/grin-explorer")
                        .send().await?;
         val    = serde_json::from_str(&result.text().await?)?;
     }

templates/base.html.tera

@@ -341,7 +341,7 @@
 	  <div class="d-sm-none"> <!-- Show on < sm screens-->
             <div class="row mb-2">
               <div class="d-flex justify-content-center">
-                <a class="text-decoration-none me-2" href="https://git.pka.world/butler/grin-explorer">
+                <a class="text-decoration-none me-2" href="https://git.us-ea.st/butler/grin-explorer">
                   <span style="color:grey"><i class="bi bi-git me-1"></i>v0.1.9</span>
 	        </a>
                 <a class="text-decoration-none me-2" href="/search">
@@ -363,7 +363,7 @@
 	  <div class="d-none d-sm-block"> <!-- Show on >= sm screens -->
             <div class="row mb-2">
               <div class="d-flex justify-content-center">
-                <a class="text-decoration-none me-2" href="https://git.pka.world/butler/grin-explorer">
+                <a class="text-decoration-none me-2" href="https://git.us-ea.st/butler/grin-explorer">
                   <span style="color:grey"><i class="bi bi-git me-1"></i>v0.1.9</span>
 	        </a>
                 <a class="text-decoration-none me-2" href="/search">