feat: Enhance team lifecycle roles with checkpoint handling and inner loop execution

- Added checkpoint gate handling to the coordinator role, defining behavior based on quality gate results.
- Updated planner role to utilize inner loop pattern for structured implementation planning and reporting.
- Revised writer role to implement inner loop for document generation, delegating CLI execution to a subagent.
- Introduced a new doc-generation subagent for isolated CLI calls and document generation strategies.
- Enhanced UI components in the frontend to display job statuses, last run times, and improved error handling.
- Updated localization files to include new strings for job details and status banners.
- Improved CSS styles for markdown previews to enhance readability and presentation.

.claude/skills/team-lifecycle-v4/specs/team-config.json

@@ -22,17 +22,21 @@
     "writer": {
       "task_prefix": "DRAFT",
       "responsibility": "Product Brief / PRD / Architecture / Epics document generation + inline discuss",
+      "execution_mode": "inner_loop",
+      "subagent_type": "universal-executor",
       "inline_discuss": ["DISCUSS-002", "DISCUSS-003", "DISCUSS-004", "DISCUSS-005"],
       "message_types": ["draft_ready", "draft_revision", "error"]
     },
     "planner": {
       "task_prefix": "PLAN",
       "responsibility": "Multi-angle code exploration (via shared explore), structured implementation planning",
+      "execution_mode": "inner_loop",
       "message_types": ["plan_ready", "plan_revision", "error"]
     },
     "executor": {
       "task_prefix": "IMPL",
       "responsibility": "Code implementation following approved plans",
+      "execution_mode": "inner_loop",
       "message_types": ["impl_complete", "impl_progress", "error"]
     },
     "tester": {
@@ -42,10 +46,10 @@
     },
     "reviewer": {
       "task_prefix": "REVIEW",
-      "additional_prefixes": ["QUALITY"],
-      "responsibility": "Code review (REVIEW-*) + Spec quality validation (QUALITY-*) + inline discuss for sign-off",
+      "additional_prefixes": ["QUALITY", "IMPROVE"],
+      "responsibility": "Code review (REVIEW-*) + Spec quality validation (QUALITY-*) + Quality improvement recheck (IMPROVE-*) + inline discuss for sign-off",
       "inline_discuss": "DISCUSS-006",
-      "message_types": ["review_result", "quality_result", "fix_required", "error"]
+      "message_types": ["review_result", "quality_result", "quality_recheck", "fix_required", "error"]
     },
     "architect": {
       "task_prefix": "ARCH",
@@ -83,6 +87,33 @@
     }
   },
 
+  "checkpoint_commands": {
+    "revise": {
+      "handler": "handleRevise",
+      "pattern": "revise <TASK-ID> [feedback]",
+      "cascade": true,
+      "creates": "revision_task"
+    },
+    "feedback": {
+      "handler": "handleFeedback",
+      "pattern": "feedback <text>",
+      "cascade": true,
+      "creates": "revision_chain"
+    },
+    "recheck": {
+      "handler": "handleRecheck",
+      "pattern": "recheck",
+      "cascade": false,
+      "creates": "quality_recheck"
+    },
+    "improve": {
+      "handler": "handleImprove",
+      "pattern": "improve [dimension]",
+      "cascade": false,
+      "creates": "improvement_task + quality_recheck"
+    }
+  },
+
   "pipelines": {
     "spec-only": {
       "description": "Specification pipeline: research+discuss -> draft+discuss x4 -> quality+discuss",