fix(web/ui): correct project card layout and unify config section actions

- Fix .project-card flex direction so expanded repos align left
- Add .config-section-actions for consistent save bars
- Replace sticky footer in Config Profiles with config-section-actions
- Replace dialog-actions in Tool Type editor with config-section-actions
- Convert manifest editor preview block to .config-section

apps/web/src/components/features/config-profiles/ConfigProfileEditorPanel.tsx

@@ -294,7 +294,7 @@ export const ConfigProfileEditorPanel = ({
               <GitMountEditor mounts={formData.git_mounts || []} onChange={(git_mounts) => onFormChange("git_mounts", git_mounts)} />
             </section>
 
-            <div className="dialog-actions sticky-footer">
+            <div className="config-section-actions">
               <button type="submit" disabled={saveStatus === "saving"} className="btn btn-primary">
                 <Icon name={isCreating ? "add" : "save"} size="sm" />
                 {saveStatus === "saving" ? "Saving..." : isCreating ? "Create Profile" : "Save Changes"}

apps/web/src/components/features/tool-workshop/ToolTypeEditorPanel.tsx

@@ -332,7 +332,7 @@ export const ToolTypeEditorPanel = ({
 
 						{toolTypeError && <p className="text-error">{toolTypeError}</p>}
 
-						<div className="dialog-actions mt-4">
+						<div className="config-section-actions">
 							<button type="submit" className="btn btn-primary">
 								<Icon name={isCreating ? "add" : "save"} size="sm" />
 								{isCreating ? "Create Tool Type" : "Save Changes"}

apps/web/src/components/features/tool/manifest-editor.tsx

@@ -749,14 +749,19 @@ export const ManifestEditor = ({
 			</section>
 
 			{/* Preview */}
-			<div className="card-md stack stack-md">
-				<div className="row justify-between items-center">
-					<h4 className="m-0">Live Preview</h4>
+			<section className="config-section">
+				<div className="config-section-header">
+					<div>
+						<h4 className="config-section-title">Live Preview</h4>
+						<p className="config-section-subtitle">
+							Preview generated Dockerfile and Compose output
+						</p>
+					</div>
 					<button
 						type="button"
 						onClick={handlePreview}
 						disabled={previewLoading}
-						className="button-secondary"
+						className="btn btn-secondary"
 					>
 						<Icon name="refresh" size="sm" />
 						{previewLoading ? "Compiling..." : "Preview"}
@@ -779,7 +784,7 @@ export const ManifestEditor = ({
 						</div>
 					</div>
 				)}
-			</div>
+			</section>
 		</div>
 	);
 };