Improve operational UX, recovery flows, and action safety

Implement the approved UX review across Fleet, Betas, Library, deployments, and Settings. Add reviewed promotion and reconciliation plans, atomic queued-removal cancellation, recoverable beta drafts and launch inputs, accessible controls, and mobile improvements.

Validated with 473 tests, a clean typecheck, production build, and isolated desktop/mobile browser walkthroughs. Include the review and implementation coverage notes.

src/lib/server/fleet/deployments.ts

@@ -30,12 +30,31 @@ export function getDeployment(id: string) {
     const collection = db().prepare(`SELECT c.id, c.name FROM server_collection_members m
         JOIN server_launch_collections c ON c.id = m.collection_id WHERE m.deployment_id = ?`).get(id) ?? null;
     return { deployment, events, recipe: launch ? summarizeRecipe(launch.recipe) : null, blueprintName: launch?.blueprintName ?? null,
-        canResumeVerification: canResumeVerification(id), canResumeCleanup: canResumeCleanup(id), collection };
+        canResumeVerification: canResumeVerification(id), canResumeCleanup: canResumeCleanup(id), canCancelRemoval: canCancelRemoval(id), collection };
 }
 
 // This stage is written only after Komodo has confirmed deployment deletion.
 export const REMOVING_SERVER = 'Removing server files and registry';
 
+export function canCancelRemoval(id: string): boolean {
+    return !!db().prepare("SELECT id FROM server_deployments WHERE id = ? AND action = 'destroy' AND state = 'waiting' AND stage != ?").get(id, REMOVING_SERVER);
+}
+
+/** Competes atomically with the worker's claim, before any external removal. */
+export function cancelRemoval(id: string): boolean {
+    return db().transaction(() => {
+        const result = db().prepare(`UPDATE server_deployments SET state = 'cancelled', stage = 'Removal cancelled', finished_at = ?, error = NULL
+            WHERE id = ? AND action = 'destroy' AND state = 'waiting' AND stage != ?`).run(new Date().toISOString(), id, REMOVING_SERVER);
+        if (!result.changes) return false;
+        recordDeploymentEvent(id, 'Queued removal cancelled. The server and its files were kept.');
+        return true;
+    })();
+}
+
+export function claimRemoval(id: string): boolean {
+    return db().prepare("UPDATE server_deployments SET state = 'running' WHERE id = ? AND action = 'destroy' AND state = 'waiting'").run(id).changes > 0;
+}
+
 export function canResumeCleanup(id: string): boolean {
     return !!db().prepare(`SELECT d.id FROM server_deployments d
         WHERE d.id = ? AND d.action = 'destroy' AND d.state IN ('failed', 'interrupted') AND d.stage = ?
@@ -81,8 +100,9 @@ export function finishDeployment(id: string, result: { ok: boolean; message?: st
 }
 
 export function listDeployments() {
-    return db().prepare(`SELECT d.*, EXISTS(SELECT 1 FROM servers s WHERE s.name = d.server) AS server_exists
-        FROM server_deployments d ORDER BY started_at DESC, rowid DESC`).all();
+    return db().prepare(`SELECT d.*, EXISTS(SELECT 1 FROM servers s WHERE s.name = d.server) AS server_exists,
+        (d.action = 'destroy' AND d.state = 'waiting' AND d.stage != ?) AS canCancelRemoval
+        FROM server_deployments d ORDER BY started_at DESC, rowid DESC`).all(REMOVING_SERVER);
 }
 
 export function interruptDeployments(): void {