feat: initial SmartAssistant module — unified AI assistant with case memory

Merges CrmAssistant + OfficeAssistant into a single module with:
- Floating chat (FAB) with auto office/case mode detection
- CaseMemory entity for persistent per-case knowledge
- save_memory AI tool for proactive memory saving
- Auto-extraction hooks (status changes, hearings)
- AlertCalculator for office-level alerts
- Full conversation persistence via ConversationRepository
- RTL/Hebrew support throughout (fa_IR)

47 files, 0 dependencies on old modules.

build.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Build extension ZIP package
+set -euo pipefail
+VERSION=$(python3 -c "import json; print(json.load(open('manifest.json'))['version'])")
+MODULE=$(python3 -c "import json; m=json.load(open('manifest.json')); print(m.get('module', m['name']))")
+ZIPNAME="${MODULE}-${VERSION}.zip"
+echo "Building $ZIPNAME..."
+rm -f "$ZIPNAME"
+zip -r "$ZIPNAME" manifest.json files/ \
+  -x "*.DS_Store" "*__MACOSX*" "*.zip"
+echo "✓ Built: $ZIPNAME ($(du -h "$ZIPNAME" | cut -f1))"