feat(channels): auto-enable official discord plugin

- add runtime injection for official Discord Channels on eligible native Claude sessions

- add CLI and dashboard configuration plus secure token handling

- add tests for launch planning, token sync, and config routing

Refs #783

src/utils/claude-config-path.ts

@@ -1,6 +1,15 @@
 import * as path from 'path';
 import { getCcsHome } from './config-manager';
 
+/**
+ * Resolve the canonical default Claude config directory.
+ * Ignores CLAUDE_CONFIG_DIR so CCS can keep a stable source of truth
+ * for shared plugin/channel state while still honoring test/dev home overrides.
+ */
+export function getDefaultClaudeConfigDir(): string {
+  return path.join(getCcsHome(), '.claude');
+}
+
 /**
  * Resolve Claude config directory with test/dev overrides.
  * Precedence:
@@ -13,7 +22,7 @@ export function getClaudeConfigDir(): string {
     return path.resolve(process.env.CLAUDE_CONFIG_DIR);
   }
 
-  return path.join(getCcsHome(), '.claude');
+  return getDefaultClaudeConfigDir();
 }
 
 /** Resolve Claude settings.json path. */