feat: an ordered backlog

A Backlog tab lists the tickets still to start in the order the team will
take them; drag them, or use the arrows, to reorder. Moving a ticket only
rewrites that ticket's rank, read from the event store, and board columns
follow the same order.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/mcp/src/app/api/taskstream.schema.ts

@@ -475,6 +475,26 @@ export interface paths {
         patch?: never;
         trace?: never;
     };
+    "/api/issues/{issue}/rank": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        get?: never;
+        /**
+         * Move the ticket in the backlog
+         * @description Between the ticket that ends up above it and the one below (either may be left out for the top or the bottom). Board columns follow the same order.
+         */
+        put: operations["IssuesController_rank"];
+        post?: never;
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
     "/api/issues/{issue}/checklist": {
         parameters: {
             query?: never;
@@ -1208,6 +1228,8 @@ export interface components {
             watchers: components["schemas"]["UserRefDto"][];
             /** @description The epic or ticket this one breaks down */
             parent: components["schemas"]["IssueParentDto"] | null;
+            /** @description Place in the backlog and its board column (ascending, as text) */
+            rank: string;
             checklist: components["schemas"]["ChecklistItemDto"][];
             commentCount: number;
             /** Format: date-time */
@@ -1334,6 +1356,8 @@ export interface components {
             /** @description Total matches (for pagination) */
             total: number;
         };
+        /** @enum {string} */
+        IssueSort: "RECENT" | "RANK";
         CreateIssueDto: {
             description?: string | null;
             /**
@@ -1425,6 +1449,18 @@ export interface components {
              */
             parent: string | null;
         };
+        RankIssueDto: {
+            /**
+             * @description The ticket that ends up right above (id or key; null: the top)
+             * @example WEB-4
+             */
+            above?: string | null;
+            /**
+             * @description The ticket that ends up right below (id or key; null: the bottom)
+             * @example WEB-9
+             */
+            below?: string | null;
+        };
         ChecklistItemBodyDto: {
             /** @example Actualizar el changelog */
             text: string;
@@ -3017,6 +3053,8 @@ export interface operations {
                 label?: string[];
                 /** @description Only the tickets hanging from this one (id or key) */
                 parent?: string;
+                /** @description RECENT (default): last updated first. RANK: backlog order. */
+                sort?: components["schemas"]["IssueSort"];
                 /** @description Matches key, title or description */
                 search?: string;
             };
@@ -3671,6 +3709,86 @@ export interface operations {
             };
         };
     };
+    IssuesController_rank: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path: {
+                /** @description Ticket id or key */
+                issue: string;
+            };
+            cookie?: never;
+        };
+        requestBody: {
+            content: {
+                "application/json": components["schemas"]["RankIssueDto"];
+            };
+        };
+        responses: {
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["CommandResultDto"];
+                };
+            };
+            /** @description Invalid input */
+            400: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ApiErrorDto"];
+                };
+            };
+            /** @description Missing or rejected Pireon token */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ApiErrorDto"];
+                };
+            };
+            /** @description Not a member of the project (or not allowed) */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ApiErrorDto"];
+                };
+            };
+            /** @description Not found */
+            404: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ApiErrorDto"];
+                };
+            };
+            /** @description Someone changed it at the same time: retry */
+            409: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ApiErrorDto"];
+                };
+            };
+            /** @description Business rule (e.g. a transition the workflow forbids) */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ApiErrorDto"];
+                };
+            };
+        };
+    };
     IssuesController_addChecklistItem: {
         parameters: {
             query?: never;