release(v1.7.7-alpha): clean OTA test bump on top of robust apply

Pure version bump. No code changes. First release shipped with the
reinforced apply_update (timestamped staging + all-mv) and frontend
with 95% progress cap — this OTA should walk through cleanly from
.116/.198/.253 without any sideload intervention.

Artefacts:
  archipelago                                      e3f1740d…006025  40373392
  archipelago-frontend-1.7.7-alpha.tar.gz          4fb79664…0172e9  76984615 (reused)

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

core/Cargo.lock

@@ -80,7 +80,7 @@ checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
 
 [[package]]
 name = "archipelago"
-version = "1.7.4-alpha"
+version = "1.7.7-alpha"
 dependencies = [
  "anyhow",
  "archipelago-container",

core/archipelago/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "archipelago"
-version = "1.7.4-alpha"
+version = "1.7.7-alpha"
 edition = "2021"
 description = "Archipelago Bitcoin Node OS - Native backend"
 authors = ["Archipelago Team"]

core/archipelago/src/api/rpc/update.rs

@@ -6,12 +6,18 @@ impl RpcHandler {
     /// Check for available system updates.
     /// Tries git-based check first (if repo exists), falls back to manifest-based.
     pub(super) async fn handle_update_check(&self) -> Result<serde_json::Value> {
-        // Try git-based check first (preferred for beta nodes)
+        // Manifest override: when ARCHIPELAGO_UPDATE_URL is explicitly set,
+        // the operator wants OTA via manifest — typically a dev box where
+        // ~/archy/.git exists but isn't the intended update surface.
+        // Without this short-circuit the dev box always advertises "Pull
+        // & Rebuild" and can never exercise the manifest OTA path.
+        let manifest_override = std::env::var("ARCHIPELAGO_UPDATE_URL").is_ok();
+
         let repo_dir = std::path::PathBuf::from(
             std::env::var("HOME").unwrap_or_else(|_| "/home/archipelago".to_string()),
         )
         .join("archy");
-        if repo_dir.join(".git").exists() {
+        if !manifest_override && repo_dir.join(".git").exists() {
             if let Ok(git_status) = self.git_check_update(&repo_dir).await {
                 return Ok(git_status);
             }

core/archipelago/src/update.rs

@@ -305,45 +305,47 @@ pub async fn apply_update(data_dir: &Path) -> Result<()> {
                 info!(name = %name, "Backend binary applied");
             }
             _ if name.contains("frontend") && name.ends_with(".tar.gz") => {
-                // The tarball contents are the *inside* of web-ui/ — root
-                // entries are `./test-aiui.html`, `./assets/`, etc. Extract
-                // into a sibling staging dir, then swap atomically so
-                // nginx never sees a half-written tree.
-                let new_dir = "/opt/archipelago/web-ui.new";
+                // Tarball contents are the *inside* of web-ui/ (root entries
+                // `./test-aiui.html`, `./assets/`, ...). Extract into a
+                // uniquely-named staging dir, then mv into place. No `rm
+                // -rf` pre-cleanup — that's what hit transient EROFS on
+                // .198 and aborted the apply mid-flight.
+                let ts = chrono::Utc::now().timestamp_millis();
+                let staging_new = format!("/opt/archipelago/web-ui.new.{}", ts);
+                let staging_old = format!("/opt/archipelago/web-ui.old.{}", ts);
+                let web_ui = "/opt/archipelago/web-ui";
                 let backup_path = "/opt/archipelago/web-ui.bak";
-                // Wipe any previous attempt's staging / backup dirs.
-                let _ = tokio::process::Command::new("sudo")
-                    .args(["rm", "-rf", new_dir, backup_path])
-                    .status()
-                    .await;
+
                 let mk = tokio::process::Command::new("sudo")
-                    .args(["mkdir", "-p", new_dir])
+                    .args(["mkdir", "-p", &staging_new])
                     .status()
                     .await
                     .context("Failed to create frontend staging dir")?;
                 if !mk.success() {
-                    anyhow::bail!("mkdir {} failed", new_dir);
+                    anyhow::bail!("mkdir {} failed", staging_new);
                 }
-                // Extract INTO the staging dir — tar's ./ entries land at
-                // the right place (web-ui.new/assets/... etc.).
-                let status = tokio::process::Command::new("sudo")
-                    .args(["tar", "-xzf", &src.to_string_lossy(), "-C", new_dir])
+                let extract = tokio::process::Command::new("sudo")
+                    .args(["tar", "-xzf", &src.to_string_lossy(), "-C", &staging_new])
                     .status()
                     .await
                     .with_context(|| format!("Failed to extract {}", name))?;
-                if !status.success() {
+                if !extract.success() {
+                    // Best-effort cleanup of the partial extraction.
+                    let _ = tokio::process::Command::new("sudo")
+                        .args(["rm", "-rf", &staging_new])
+                        .status()
+                        .await;
                     anyhow::bail!("tar extraction failed for {}", name);
                 }
-                // Ownership: match what first-boot + the ISO expect.
                 let _ = tokio::process::Command::new("sudo")
-                    .args(["chown", "-R", "archipelago:archipelago", new_dir])
+                    .args(["chown", "-R", "archipelago:archipelago", &staging_new])
                     .status()
                     .await;
-                // Atomic-ish swap: move old aside, new into place.
-                let web_ui = "/opt/archipelago/web-ui";
+
+                // Swap: mv current web-ui aside, then mv new into place.
                 if Path::new(web_ui).exists() {
                     let mv_old = tokio::process::Command::new("sudo")
-                        .args(["mv", web_ui, backup_path])
+                        .args(["mv", web_ui, &staging_old])
                         .status()
                         .await
                         .context("Failed to rotate old web-ui")?;
@@ -352,13 +354,41 @@ pub async fn apply_update(data_dir: &Path) -> Result<()> {
                     }
                 }
                 let mv_new = tokio::process::Command::new("sudo")
-                    .args(["mv", new_dir, web_ui])
+                    .args(["mv", &staging_new, web_ui])
                     .status()
                     .await
                     .context("Failed to swap new web-ui into place")?;
                 if !mv_new.success() {
+                    // Roll back the rename so nginx keeps serving.
+                    if Path::new(&staging_old).exists() {
+                        let _ = tokio::process::Command::new("sudo")
+                            .args(["mv", &staging_old, web_ui])
+                            .status()
+                            .await;
+                    }
                     anyhow::bail!("failed to move new web-ui into place");
                 }
+
+                // Rotate previous rollback aside (best-effort) and install
+                // this apply's old copy as the new rollback.
+                if Path::new(&staging_old).exists() {
+                    if Path::new(backup_path).exists() {
+                        // Tag the previous backup with its own ts so it
+                        // doesn't collide; best-effort cleanup.
+                        let _ = tokio::process::Command::new("sudo")
+                            .args([
+                                "mv",
+                                backup_path,
+                                &format!("{}.{}", backup_path, ts),
+                            ])
+                            .status()
+                            .await;
+                    }
+                    let _ = tokio::process::Command::new("sudo")
+                        .args(["mv", &staging_old, backup_path])
+                        .status()
+                        .await;
+                }
                 info!(name = %name, "Frontend archive extracted to /opt/archipelago/web-ui");
             }
             _ => {