fix(tui): kept ssh partial result commit-unstable

Reviewer flagged that ToolExecutionComponent.isTranscriptBlockCommitStable\ntreated any block with a defined #result as commit-stable, so a long\nstreaming SSH partial render could sit on its stable pending header until\nderiveLiveCommitState's stable-prefix ratchet promoted it to native\nscrollback, then the final SSH glyph render would land below and strand a\nduplicate pending header above the settled frame.\n\n- Added ToolRenderer.provisionalPartialResult opt-in for renderers whose\n  partial-result chrome differs from the final render.\n- Honored it in ToolExecutionComponent.isTranscriptBlockCommitStable so the\n  block stays commit-unstable while isPartial holds and flips stable as soon\n  as the result settles.\n- Set provisionalPartialResult: true on the SSH renderer.\n- Added test/tools/ssh-commit-stability.test.ts covering the partial/final\n  transition and the non-regression for bash.\n\nFixes #3177

packages/coding-agent/src/tools/renderers.ts

@@ -52,6 +52,17 @@ export type ToolRenderer = {
 	 * streams rows the result render preserves.
 	 */
 	provisionalPendingPreview?: boolean | "collapsed";
+	/**
+	 * Whether the partial-result render is provisional: chrome rows (header
+	 * glyph, frame state) that change between `options.isPartial === true` and
+	 * the final result render. When `true`, the block is treated as
+	 * commit-unstable while a partial result is in flight, so the
+	 * stable-prefix ratchet in `deriveLiveCommitState` cannot promote the
+	 * partial chrome to native scrollback only to have the final render strand
+	 * it above the settled frame. Absent = the partial render is byte-stable
+	 * with the final render and may commit like any settled stream.
+	 */
+	provisionalPartialResult?: boolean;
 };
 
 export const toolRenderers: Record<string, ToolRenderer> = {

packages/coding-agent/src/tools/ssh.ts

@@ -373,4 +373,12 @@ export const sshToolRenderer = {
 	// that shifts while args stream. Expanded output is top-anchored enough for
 	// the transcript to commit its settled prefix.
 	provisionalPendingPreview: "collapsed",
+	// Partial-result chrome (pending icon and frame state) differs from the
+	// final SSH glyph/state, so the block stays commit-unstable while
+	// `options.isPartial` holds. Without this, a long-running SSH command's
+	// stable pending header would be promoted by the stable-prefix ratchet and
+	// committed to native scrollback, then the final render's SSH glyph would
+	// land below and strand a duplicate pending header above the final frame
+	// ([#3177](https://github.com/can1357/oh-my-pi/issues/3177)).
+	provisionalPartialResult: true,
 };