feat: sweet AI assistant in the Tools drawer

pyproject.toml

@@ -37,18 +37,16 @@ classifiers = [
 ]
 dependencies = [
     "textual>=0.41.0",
-    "polars>=0.20.0",
+    "polars>=1.32.0",
     "duckdb>=0.9.0",
     "rich>=13.0.0",
     "click>=8.0.0",
     "tree-sitter-python>=0.23.6",
+    "chatlas>=0.9.2",
+    "anthropic>=0.62.0",
 ]
 requires-python = ">=3.10"
 
-[project.optional-dependencies]
-excel = ["polars[xlsx]>=0.20.0"]
-parquet = ["pyarrow>=10.0.0"]
-
 [dependency-groups]
 dev = [
     "pytest>=7.0.0",

sweet/ui/sweet.tcss

@@ -660,3 +660,36 @@ Button#column-type-btn, Button#polars-exec-btn {
 .hidden {
     display: none;
 }
+
+/* ==============================================
+   TOOLS PANEL - HISTORY CONTAINERS
+   ============================================== */
+/* Make chat history containers have consistent fixed height */
+ToolsPanel #chat-history-scroll {
+    height: 16;
+    min-height: 16;
+    max-height: 16;
+}
+
+ToolsPanel #llm-response-scroll {
+    height: auto;
+    min-height: 10;
+    max-height: 1fr;
+}
+
+/* When approval UI is active, limit history container height to make room for buttons */
+ToolsPanel #chat-history-scroll.compact {
+    height: 16;
+    min-height: 8;
+    max-height: 16;
+}
+
+/* Ensure the Sweet AI Assistant section stretches vertically */
+ToolsPanel #llm-transform-content {
+    height: 1fr;
+}
+
+/* Make sure the panel sections can grow */
+ToolsPanel .panel-section {
+    height: 1fr;
+}