feat(web): implement schedule editor in MaintenancePoliciesTab

Enhanced the MaintenancePoliciesTab by integrating a schedule editor for maintenance policies. Users can now select schedule modes, input custom cron expressions, and dynamically update the schedule preview. This update improves the user interface and experience for managing maintenance schedules.

.cursor/commands/van.md

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+# VAN Command - Initialization & Entry Point
+
+This command initializes the Memory Bank system, performs platform detection, determines task complexity, and routes to appropriate workflows.
+
+## Memory Bank Integration
+
+**CRITICAL:** All Memory Bank files are located in `memory-bank/` directory:
+- `memory-bank/tasks.md` - Source of truth for task tracking
+- `memory-bank/activeContext.md` - Current focus
+- `memory-bank/progress.md` - Implementation status
+- `memory-bank/projectbrief.md` - Project foundation
+
+## Progressive Rule Loading
+
+This command loads rules progressively to optimize context usage:
+
+### Step 1: Load Core Rules (Always Required)
+```
+Load: .cursor/rules/isolation_rules/main.mdc
+Load: .cursor/rules/isolation_rules/Core/memory-bank-paths.mdc
+Load: .cursor/rules/isolation_rules/Core/platform-awareness.mdc
+Load: .cursor/rules/isolation_rules/Core/file-verification.mdc
+```
+
+### Step 2: Load VAN Mode Map
+```
+Load: .cursor/rules/isolation_rules/visual-maps/van_mode_split/van-mode-map.mdc
+```
+
+### Step 3: Load Complexity-Specific Rules (Based on Task Analysis)
+After determining complexity level, load:
+- **Level 1:** `.cursor/rules/isolation_rules/Level1/workflow-level1.mdc`
+- **Level 2-4:** Load plan mode rules (transition to PLAN command)
+
+## Workflow
+
+1. **Platform Detection**
+   - Detect operating system
+   - Adapt commands for platform
+   - Set path separators
+
+2. **Memory Bank Verification**
+   - Check if `memory-bank/` directory exists
+   - If not, create Memory Bank structure
+   - Verify essential files exist
+
+3. **Task Analysis**
+   - Read `memory-bank/tasks.md` if exists
+   - Analyze task requirements
+   - Determine complexity level (1-4)
+
+4. **Route Based on Complexity**
+   - **Level 1:** Continue in VAN mode, proceed to implementation
+   - **Level 2-4:** Transition to `/plan` command
+
+5. **Update Memory Bank**
+   - Update `memory-bank/tasks.md` with complexity determination
+   - Update `memory-bank/activeContext.md` with current focus
+
+## Usage
+
+Type `/van` followed by your task description or initialization request.
+
+Example:
+```
+/van Initialize project for adding user authentication feature
+```
+
+## Next Steps
+
+- **Level 1 tasks:** Proceed directly to `/build` command
+- **Level 2-4 tasks:** Use `/plan` command for detailed planning
+