Replace duplicate Vectors metric with embedding dimension (#58)

The sidebar showed a 'Vectors' count that was always identical to
'Chunks' (each chunk maps 1:1 to one embedding vector), so the status
dict populated "vectors" from total_chunks. Drop the redundant key and
surface the embedding dimension instead, which is a genuinely distinct,
already-available index property.


Claude-Session: https://claude.ai/code/session_0146322CMjUFgK5MPofG4vLd

Co-authored-by: Claude <noreply@anthropic.com>

Author: Neverdecel

coderag/api.py

@@ -227,7 +227,6 @@ def status(self) -> dict:
             "watched_dir": str(self.config.watched_dir),
             "total_files": stats.total_files,
             "total_chunks": stats.total_chunks,
-            "vectors": stats.total_chunks,
         }
 
     def close(self) -> None:

coderag/surfaces/templates/_sidebar.html

@@ -3,7 +3,7 @@ <h2>Index</h2>
   <dl class="metrics">
     <div><dt>Files</dt><dd>{{ status.total_files }}</dd></div>
     <div><dt>Chunks</dt><dd>{{ status.total_chunks }}</dd></div>
-    <div><dt>Vectors</dt><dd>{{ status.vectors }}</dd></div>
+    <div><dt>Dim</dt><dd>{{ status.embedding_dim }}</dd></div>
   </dl>
   <div class="meta">
     <div class="meta-row"><span class="k">Model</span><span class="v">{{ status.model }}</span></div>