refactor(platform): Phase 732 deliveryScope namespace and diagnostics mixin

Replace 173-line delivery import destructuring in index.js with
deliveryScope.* references (~205 lines removed). Extract
platform-diagnostics-mixin and platform-server-folders-imports; add
manifest row 60 (PLATFORM_MIXIN_ASSIGNMENT_COUNT). No behavior changes.

Co-authored-by: Cursor <[email protected]>

README.md

@@ -54,6 +54,8 @@ Application facade: one `PearcordPlatform` class that wires identity, database,
 
 **Phase 723 (v0.8.699):** Dedicated slash registry & invoke audit export JSON — `slash-registry-json-mixin.js`, `slash-invoke-audit-json-mixin.js`, spans `slash-registry.json` / `slash-invoke-audit.json`, `getSlashInvokeAuditExportJsonExport`, `clearSlashInvokeAuditExportJsonExports`, deep links `openSlashRegistryJson` / `openSlashInvokeAuditJson`. Bundle: `npm run test:ci-phase723`.
 
+**Phase 732 (v0.8.708):** `index.js` uses `deliveryScope.*` for delivery-receipts exports; `platform-diagnostics-mixin.js`, `platform-server-folders-imports.js`; 60 mixin manifest rows. Bundle: `npm run test:ci-phase732`.
+
 **Phase 731 (v0.8.707):** `platform-pearcord-shared-imports.js`, `platform-index-local-imports.js`, named `platform-delivery-receipts-imports.js`, `platform-bootstrap.js`; gossip registry `ALL_GOSSIP_ALIGNMENT_ROWS`. Bundle: `npm run test:ci-phase731`.
 
 **Phase 730 (v0.8.706):** `platform-mixin-assign-manifest.js` drives 59 prototype mixin assigns; `json-export-gossip-alignment-validate.js` + registry-backed smokes; `platform-ipc-contract.js`; digest-json per-entry gossip keys. Bundle: `npm run test:ci-phase730`.

platform-diagnostics-mixin.js

@@ -0,0 +1,39 @@
+'use strict'
+
+const fs = require('bare-fs')
+const path = require('bare-path')
+
+/** UI diagnostics JSONL writer (extracted from index.js, Phase 732). */
+const platformDiagnosticsMixin = {
+  writeDiagnosticsJsonl (lines = [], meta = {}) {
+    const file = path.join(this.storagePath, `diagnostics-ui-${Date.now()}.jsonl`)
+    const logFile = path.join(this.storagePath, 'pearcord.log')
+    const arr = Array.isArray(lines) ? lines : []
+    const out = []
+    if (meta && typeof meta === 'object' && Object.keys(meta).length) {
+      out.push(
+        JSON.stringify({
+          type: 'diagnostics-meta',
+          exportedAt: Date.now(),
+          logFile,
+          ...meta
+        })
+      )
+    }
+    for (const line of arr) {
+      out.push(typeof line === 'string' ? line : JSON.stringify(line))
+    }
+    const body = out.filter((s) => s && s.length).join('\n')
+    const payload = body ? `${body}\n` : ''
+    fs.writeFileSync(file, payload)
+    const dataLines = arr.filter((s) => s && String(s).length).length
+    return {
+      file,
+      lineCount: dataLines,
+      metaLineCount: meta && Object.keys(meta).length ? 1 : 0,
+      bytes: payload.length
+    }
+  }
+}
+
+module.exports = { platformDiagnosticsMixin }

platform-mixin-assign-manifest.js

@@ -4,7 +4,7 @@
  * Ordered PearcordPlatform prototype mixin registration (Phase 730).
  * Preserves assign order from index.js / apply-platform-mixins (Phase 727).
  */
-const PLATFORM_MIXIN_ASSIGNMENT_COUNT = 59
+const PLATFORM_MIXIN_ASSIGNMENT_COUNT = 60
 
 const PLATFORM_MIXIN_ASSIGNMENTS = [
   { module: './polls-scheduling', export: 'pollSchedulingMixin' },
@@ -65,7 +65,8 @@ const PLATFORM_MIXIN_ASSIGNMENTS = [
   { module: './slash-registry-json-mixin', export: 'slashRegistryJsonMixin' },
   { module: './slash-invoke-audit-json-mixin', export: 'slashInvokeAuditJsonMixin' },
   { module: './worker-release-json-mixin', export: 'workerReleaseJsonMixin' },
-  { module: './integration-manifest-json-mixin', export: 'integrationManifestJsonMixin' }
+  { module: './integration-manifest-json-mixin', export: 'integrationManifestJsonMixin' },
+  { module: './platform-diagnostics-mixin', export: 'platformDiagnosticsMixin' }
 ]
 
 if (PLATFORM_MIXIN_ASSIGNMENTS.length !== PLATFORM_MIXIN_ASSIGNMENT_COUNT) {

platform-server-folders-imports.js

@@ -0,0 +1,17 @@
+'use strict'
+
+/** pearcord-server-folders bindings for PearcordPlatform (Phase 732). */
+const folders = require('pearcord-server-folders')
+
+module.exports = {
+  normalizeServerFolders: folders.normalizeServerFolders,
+  buildServerRailLayout: folders.buildServerRailLayout,
+  createServerFolderState: folders.createFolder,
+  deleteServerFolderState: folders.deleteFolder,
+  assignGuildToFolderState: folders.assignGuildToFolder,
+  setFolderCollapsedState: folders.setFolderCollapsed,
+  renameServerFolderState: folders.renameFolder,
+  setServerFolderColorState: folders.setFolderColor,
+  reorderServerFoldersState: folders.reorderFolders,
+  FOLDER_COLORS: folders.FOLDER_COLORS
+}