fix: route document naming through the canonical namer; sanitize LLM-chosen names

Stop self-naming in the document generators and defer to NetworkStorageIntegration's
single namer (rule N1):
- FreeDocumentGenerator and GenericTemplateGenerator no longer bake in a date prefix,
  em-dash or contact name. They set the clean subject, upload explicitly to the case
  folder (the AfterSave hook fires before the Case link exists), then realign the
  Document + Attachment names to the canonical stored name returned by the upload.
- CaseFolderManager sanitizes every model-chosen name server-side: writeFile splits
  dir/basename and de-duplicates via buildStoredFileName; createFolder, renameItem and
  moveItem sanitize their final segment. The LLM can no longer pick a raw filename.

Refs Task Master #7

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

manifest.json

@@ -3,11 +3,11 @@
     "module": "SmartAssistant",
     "description": "Unified AI Assistant for Legal CRM — floating chat with case memory, office alerts, and AI Gateway integration",
     "author": "klear",
-    "version": "2.10.4",
+    "version": "2.10.5",
     "acceptableVersions": [
         ">=8.0.0"
     ],
-    "releaseDate": "2026-05-27",
+    "releaseDate": "2026-06-03",
     "php": [
         ">=8.1"
     ]