feat(ava): add tool trace viewer mini-app

- Add SQLite storage for tool traces (Omni/Ava/Trace.hs)
- Add web server to serve trace viewer (Omni/Ava/Web.hs)
- Add HTML/CSS/JS trace viewer UI (Omni/Ava/Web/trace.html)
- Integrate trace storage into Engine.hs tool execution callback
- Add trace links to Telegram responses when AVA_WEB_URL is set
- Configure Tailscale Funnel for public access
- Fix pre-push hook variable scope bug
- Add direnv, bash, nix to Ava service PATH
- Add mustache dep to Ava.hs for template rendering

Epic: t-272

1 files changed, 2 insertions, 1 deletions

diff --git a/Omni/Agent/Subagent/Coder.hs b/Omni/Agent/Subagent/Coder.hs
index 865a97e..ad97ee7 100644
--- a/Omni/Agent/Subagent/Coder.hs
+++ b/Omni/Agent/Subagent/Coder.hs
@@ -139,9 +139,10 @@ defaultCoderConfig namespace task =
     }
 
 -- | Run a bash command and capture output
+-- Uses direnv exec to ensure the nix shell environment is loaded
 runBashCapture :: Text -> IO (Exit.ExitCode, Text, Text)
 runBashCapture cmd = do
-  (code, out, err) <- Process.readProcessWithExitCode "bash" ["-c", Text.unpack cmd] ""
+  (code, out, err) <- Process.readProcessWithExitCode "direnv" ["exec", ".", "bash", "-c", Text.unpack cmd] ""
   pure (code, Text.pack out, Text.pack err)
 
 -- | Phase 1: Initialize - check environment, detect broken state