feat: Add global relationships management to GlobalSymbolIndex

- Introduced a new schema version (v2) with a global_relationships table.
- Implemented CRUD operations for file relationships, including update and delete functionalities.
- Added query capabilities for relationships by target and symbols.
- Created migration logic from v1 to v2 schema.
- Enhanced tests for global relationships, covering various scenarios including insertion, querying, and deletion.

docs: Add update-single command for generating module documentation

- Created a new command to generate manual-style documentation (CLAUDE.md) for a single module.
- Detailed execution process and implementation phases for the command.
- Included usage examples and error handling guidelines.

feat: Implement team command for CLI interface

- Added a new team command for logging and retrieving messages in a team message bus.
- Supported subcommands for logging, reading, listing, and checking status of messages.
- Included error handling and JSON output options.

test: Add comprehensive tests for global relationships

- Developed extensive tests for the global_relationships table in GlobalSymbolIndex.
- Covered schema creation, migration, CRUD operations, and performance benchmarks.
- Ensured project isolation and validated query functionalities for relationships.

ccw/frontend/src/components/issue/hub/ObservabilityPanel.tsx

@@ -142,12 +142,12 @@ export function ObservabilityPanel() {
               <label className="block text-xs font-medium text-muted-foreground mb-1">
                 {formatMessage({ id: 'issues.observability.filters.type' })}
               </label>
-              <Select value={type} onValueChange={(v) => setType(v)}>
+              <Select value={type || '__all__'} onValueChange={(v) => setType(v === '__all__' ? '' : v)}>
                 <SelectTrigger>
                   <SelectValue placeholder={formatMessage({ id: 'issues.observability.filters.typeAll' })} />
                 </SelectTrigger>
                 <SelectContent>
-                  <SelectItem value="">{formatMessage({ id: 'issues.observability.filters.typeAll' })}</SelectItem>
+                  <SelectItem value="__all__">{formatMessage({ id: 'issues.observability.filters.typeAll' })}</SelectItem>
                   {EVENT_TYPES.map((t) => (
                     <SelectItem key={t} value={t}>
                       {t}

ccw/frontend/src/components/issue/hub/QueuePanel.tsx

@@ -209,7 +209,7 @@ export function QueuePanel() {
                 </SelectTrigger>
                 <SelectContent>
                   {(historyIndex.queues || []).length === 0 ? (
-                    <SelectItem value="" disabled>
+                    <SelectItem value="__none__" disabled>
                       {formatMessage({ id: 'issues.queue.history.empty' })}
                     </SelectItem>
                   ) : (