chat: honor the per-session cwd for Super Admin (was hardcoded to home)

claude-manager pinned the spawn cwd to HOST_HOME for Super Admin, ignoring the
cwd passed from the chat handler — so /chat sessions ran in /home/pastilhas
regardless. Now it uses params.cwd when provided (falling back to HOST_HOME),
so /chat actually runs from the dedicated claude_sessions directory.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/servers/sidecar/claude/claude-manager.ts

@@ -76,7 +76,9 @@ export async function spawnClaude(params: ClaudeSpawnParams): Promise<ClaudeCode
   }
 
   const spawnCmd = isSuperAdmin ? claudeArgs : [...buildSandboxArgs(email), ...claudeArgs];
-  const spawnCwd = isSuperAdmin ? HOST_HOME : undefined;
+  // Honor a caller-provided working directory (e.g. /chat runs from a dedicated claude_sessions dir);
+  // fall back to the host home for Super Admin, or the sandbox default otherwise.
+  const spawnCwd = isSuperAdmin ? (params.cwd ?? HOST_HOME) : undefined;
 
   const proc = Bun.spawn(spawnCmd, {
     stdin: 'pipe',
@@ -173,7 +175,9 @@ export async function spawnClaudeStreaming(
   }
 
   const spawnCmd = isSuperAdmin ? claudeArgs : [...buildSandboxArgs(email), ...claudeArgs];
-  const spawnCwd = isSuperAdmin ? HOST_HOME : undefined;
+  // Honor a caller-provided working directory (e.g. /chat runs from a dedicated claude_sessions dir);
+  // fall back to the host home for Super Admin, or the sandbox default otherwise.
+  const spawnCwd = isSuperAdmin ? (params.cwd ?? HOST_HOME) : undefined;
 
   const proc = Bun.spawn(spawnCmd, {
     stdin: 'ignore',

src/servers/sidecar/protocol.ts

@@ -61,6 +61,7 @@ export type ClaudeSpawnParams = {
   sessionKey: string;
   model?: string;
   role?: string;
+  cwd?: string;
 };
 
 export type ClaudeSpawnStreamingParams = {