feat: complete TASK-WP2-07 latest exports

apps/api/src/projects.ts

@@ -72,6 +72,17 @@ interface ProjectStateRow {
   state_version: number;
 }
 
+interface LatestExportRow {
+  byte_size: number;
+  created_at: number;
+  export_id: string;
+  format: "jpg" | "png";
+  pixel_height: number;
+  pixel_width: number;
+  sha256: string;
+  state_version: number;
+}
+
 function isProjectRatio(value: string): value is ProjectRatio {
   return projectRatios.includes(value as ProjectRatio);
 }
@@ -510,6 +521,10 @@ export class ProjectService {
     const images = this.database.prepare(`
       SELECT image_id, generation_id, created_at FROM project_images WHERE project_id = ? ORDER BY created_at, rowid
     `).all(projectId) as ImageRow[];
+    const latestExports = this.database.prepare(`
+      SELECT export_id, format, sha256, byte_size, pixel_width, pixel_height, state_version, created_at
+      FROM latest_exports WHERE project_id = ? ORDER BY format
+    `).all(projectId) as LatestExportRow[];
     const summary = this.projectSummary(row, images.length, generations.at(-1)?.status ?? null);
     const projectState = this.readProjectState(projectId);
     return {
@@ -519,6 +534,17 @@ export class ProjectService {
       draftPrompt: row.draft_prompt,
       generations: generations.map((generation) => this.generationView(generation)),
       images: images.map((image) => ({ createdAt: iso(image.created_at), generationId: image.generation_id, imageId: image.image_id })),
+      latestExports: latestExports.map((item) => ({
+        byteSize: item.byte_size,
+        createdAt: iso(item.created_at),
+        downloadUrl: `/api/v1/projects/${projectId}/latest-exports/${item.format}`,
+        exportId: item.export_id,
+        format: item.format,
+        pixelHeight: item.pixel_height,
+        pixelWidth: item.pixel_width,
+        sha256: item.sha256,
+        stateVersion: item.state_version,
+      })),
       pixelHeight: row.pixel_height,
       pixelWidth: row.pixel_width,
       saveStatus: "saved" as const,
@@ -748,6 +774,20 @@ export class ProjectService {
         FOREIGN KEY (project_id) REFERENCES projects(project_id) ON DELETE CASCADE
       );
       CREATE INDEX IF NOT EXISTS project_resource_files_managed ON project_resource_files(managed_file_id, project_id);
+      CREATE TABLE IF NOT EXISTS latest_exports (
+        project_id TEXT NOT NULL,
+        format TEXT NOT NULL CHECK (format IN ('jpg', 'png')),
+        export_id TEXT NOT NULL UNIQUE,
+        managed_file_id TEXT NOT NULL,
+        state_version INTEGER NOT NULL CHECK (state_version >= 1),
+        sha256 TEXT NOT NULL CHECK (length(sha256) = 64),
+        byte_size INTEGER NOT NULL CHECK (byte_size > 0),
+        pixel_width INTEGER NOT NULL CHECK (pixel_width > 0),
+        pixel_height INTEGER NOT NULL CHECK (pixel_height > 0),
+        created_at INTEGER NOT NULL,
+        PRIMARY KEY (project_id, format),
+        FOREIGN KEY (project_id) REFERENCES projects(project_id) ON DELETE CASCADE
+      );
       CREATE TABLE IF NOT EXISTS project_cleanup_queue (
         cleanup_id TEXT PRIMARY KEY,
         project_id TEXT NOT NULL UNIQUE,