refactor(workflow): complete migration from .workflow/sessions/ to .workflow/active/ directory structure

Update all command files to use the new standardized directory structure:
- Active sessions: .workflow/active/WFS-{session}/
- Archived sessions: .workflow/archives/WFS-{session}/

Changes:
- Updated workflow-architecture.md with new directory structure (active/ not sessions/)
- Fixed 31 path references across 12 command files
- Verified compliance across all 73 command files using parallel agent checks
- Confirmed directory naming: active/ (adjective, no plural) + archives/ (noun plural)

Files modified:
- .claude/workflows/workflow-architecture.md (directory structure definition)
- .claude/commands/cli/*.md (8 files: analyze, chat, codex-execute, discuss-plan, execute, mode/*)
- .claude/commands/memory/docs.md (4 path fixes)
- .claude/commands/task/*.md (execute, replan)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.claude/workflows/workflow-architecture.md

@@ -29,19 +29,19 @@ This document defines the complete workflow system architecture using a **JSON-o
 
 ```bash
 .workflow/
-├── sessions/
-│   ├── WFS-oauth-integration/         # Session directory (active or paused)
-│   ├── WFS-user-profile/             # Session directory (active or paused)
-│   └── WFS-bug-fix-123/              # Session directory (completed)
+├── active/
+│   ├── WFS-oauth-integration/         # Active session directory
+│   ├── WFS-user-profile/             # Active session directory
+│   └── WFS-bug-fix-123/              # Active session directory
 └── archives/
     └── WFS-old-feature/              # Archived session (completed)
 ```
 
 **Directory-Based Benefits**:
-- **Simple Discovery**: Session location determines state (sessions/ = active/paused, archives/ = completed)
+- **Simple Discovery**: Session location determines state (active/ = active sessions, archives/ = completed)
 - **No Marker Files**: Location is the state
 - **Clean Structure**: Clear separation between active and completed sessions
-- **Easy Migration**: Move between sessions/ and archives/ to change state
+- **Easy Migration**: Move between active/ and archives/ to change state
 
 ### Session Operations
 
@@ -709,7 +709,7 @@ All workflows use the same file structure definition regardless of complexity. *
 │       │   └── index.html      # Navigation page
 │       └── .run-metadata.json  # Run configuration
 │
-├── sessions/                        # Active/paused workflow sessions
+├── active/                          # Active workflow sessions
 │   └── WFS-[topic-slug]/
 │       ├── workflow-session.json        # Session metadata and state (REQUIRED)
 │       ├── [.brainstorming/]           # Optional brainstorming phase (created when needed)