[Config] Add coding guidelines and code-fixer agent

Major additions:
- Add CODING_GUIDELINES.md with "NO EMOJIS" rule
- Create code-fixer agent for automated violation fixes
- Add offline mode v2 hooks with local caching/queue
- Add periodic context save with invisible Task Scheduler setup
- Add agent coordination rules and database connection docs

Infrastructure:
- Update hooks: task-complete-v2, user-prompt-submit-v2
- Add periodic_save_check.py for auto-save every 5min
- Add PowerShell scripts: setup_periodic_save.ps1, update_to_invisible.ps1
- Add sync-contexts script for queue synchronization

Documentation:
- OFFLINE_MODE.md, PERIODIC_SAVE_INVISIBLE_SETUP.md
- Migration procedures and verification docs
- Fix flashing window guide

Updates:
- Update agent configs (backup, code-review, coding, database, gitea, testing)
- Update claude.md with coding guidelines reference
- Update .gitignore for new cache/queue directories

Status: Pre-automated-fixer baseline commit

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/hooks/sync-contexts

@@ -0,0 +1,110 @@
+#!/bin/bash
+#
+# Sync Queued Contexts to Database
+# Uploads any locally queued contexts to the central API
+# Can be run manually or called automatically by hooks
+#
+# Usage: bash .claude/hooks/sync-contexts
+#
+
+# Load configuration
+CLAUDE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+CONFIG_FILE="$CLAUDE_DIR/context-recall-config.env"
+
+if [ -f "$CONFIG_FILE" ]; then
+    source "$CONFIG_FILE"
+fi
+
+# Default values
+API_URL="${CLAUDE_API_URL:-http://172.16.3.30:8001}"
+QUEUE_DIR="$CLAUDE_DIR/context-queue"
+PENDING_DIR="$QUEUE_DIR/pending"
+UPLOADED_DIR="$QUEUE_DIR/uploaded"
+FAILED_DIR="$QUEUE_DIR/failed"
+
+# Exit if no JWT token
+if [ -z "$JWT_TOKEN" ]; then
+    echo "ERROR: No JWT token available" >&2
+    exit 1
+fi
+
+# Create directories if they don't exist
+mkdir -p "$PENDING_DIR" "$UPLOADED_DIR" "$FAILED_DIR" 2>/dev/null
+
+# Check if there are any pending files
+PENDING_COUNT=$(find "$PENDING_DIR" -type f -name "*.json" 2>/dev/null | wc -l)
+
+if [ "$PENDING_COUNT" -eq 0 ]; then
+    # No pending contexts to sync
+    exit 0
+fi
+
+echo "==================================="
+echo "Syncing Queued Contexts"
+echo "==================================="
+echo "Found $PENDING_COUNT pending context(s)"
+echo ""
+
+# Process each pending file
+SUCCESS_COUNT=0
+FAIL_COUNT=0
+
+for QUEUE_FILE in "$PENDING_DIR"/*.json; do
+    # Skip if no files match
+    [ -e "$QUEUE_FILE" ] || continue
+
+    FILENAME=$(basename "$QUEUE_FILE")
+    echo "Processing: $FILENAME"
+
+    # Read the payload
+    PAYLOAD=$(cat "$QUEUE_FILE")
+
+    # Determine endpoint based on filename
+    if [[ "$FILENAME" == *"_state.json" ]]; then
+        ENDPOINT="${API_URL}/api/project-states"
+    else
+        ENDPOINT="${API_URL}/api/conversation-contexts"
+    fi
+
+    # Try to POST to API
+    RESPONSE=$(curl -s --max-time 10 -w "\n%{http_code}" \
+        -X POST "$ENDPOINT" \
+        -H "Authorization: Bearer ${JWT_TOKEN}" \
+        -H "Content-Type: application/json" \
+        -d "$PAYLOAD" 2>/dev/null)
+
+    HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
+
+    if [ "$HTTP_CODE" = "200" ] || [ "$HTTP_CODE" = "201" ]; then
+        # Success - move to uploaded directory
+        mv "$QUEUE_FILE" "$UPLOADED_DIR/"
+        echo "  ✓ Uploaded successfully"
+        ((SUCCESS_COUNT++))
+    else
+        # Failed - move to failed directory for manual review
+        mv "$QUEUE_FILE" "$FAILED_DIR/"
+        echo "  ✗ Upload failed (HTTP $HTTP_CODE) - moved to failed/"
+        ((FAIL_COUNT++))
+    fi
+done
+
+echo ""
+echo "==================================="
+echo "Sync Complete"
+echo "==================================="
+echo "Successful: $SUCCESS_COUNT"
+echo "Failed: $FAIL_COUNT"
+echo ""
+
+# Clean up old uploaded files (keep last 100)
+UPLOADED_COUNT=$(find "$UPLOADED_DIR" -type f -name "*.json" 2>/dev/null | wc -l)
+if [ "$UPLOADED_COUNT" -gt 100 ]; then
+    echo "Cleaning up old uploaded contexts (keeping last 100)..."
+    find "$UPLOADED_DIR" -type f -name "*.json" -printf '%T@ %p\n' | \
+        sort -n | \
+        head -n -100 | \
+        cut -d' ' -f2- | \
+        xargs rm -f
+fi
+
+exit 0