🤖 Limit git status output to reduce console spam (#258)

Reduces console noise from background git status polling by increasing
the bash truncate limit.

## Changes

### Increase bash truncate limit to 80 lines

Changed from 50 → 80 lines for the `truncate` overflow policy. This
provides better debugging context for git status output while still
preventing excessive spam.

**Before (50 lines):**
- Too restrictive for useful debugging
- Git status output often cut off mid-info

**After (80 lines):**
- Provides better context for git operations
- Still prevents console flooding
- Only affects IPC bash calls (background operations)

## Note on SHOW_BRANCH truncation

Initially considered truncating `git show-branch` output before parsing,
but this would break ahead/behind counting in
`parseGitShowBranchForStatus` which iterates all commit lines. The
80-line truncate limit is sufficient for most cases, and the `truncate`
overflow policy ensures we don't spam temp files.

## Dependencies

Built on top of #256 which adds the `overflow_policy` feature.

_Generated with `cmux`_

Author: ammar-agent

src/components/GitStatusIndicator.tsx

@@ -301,8 +301,9 @@ if [ "$CURRENT_BRANCH" != "$PRIMARY_BRANCH" ] && git rev-parse --verify "origin/
   REFS="$REFS origin/$CURRENT_BRANCH"
 fi
 
-# Store show-branch output to avoid running twice
-SHOW_BRANCH=$(git show-branch --sha1-name $REFS)
+# Store show-branch output (limit to 50 commits for display)
+# --more=50 limits to 50 commits after the merge base
+SHOW_BRANCH=$(git show-branch --sha1-name --more=50 $REFS)
 
 # Output show-branch
 echo "$SHOW_BRANCH"

src/services/tools/bash.test.ts

@@ -176,15 +176,15 @@ describe("bash tool", () => {
     if (!result.success) {
       // Should contain truncation notice
       expect(result.error).toContain("[OUTPUT TRUNCATED");
-      expect(result.error).toContain("Showing first 50 of");
+      expect(result.error).toContain("Showing first 80 of");
       expect(result.error).toContain("lines:");
 
-      // Should contain first 50 lines
+      // Should contain first 80 lines
       expect(result.error).toContain("line1");
-      expect(result.error).toContain("line50");
+      expect(result.error).toContain("line80");
 
-      // Should NOT contain line 51 or beyond
-      expect(result.error).not.toContain("line51");
+      // Should NOT contain line 81 or beyond
+      expect(result.error).not.toContain("line81");
       expect(result.error).not.toContain("line100");
 
       // Should NOT create temp file

src/services/tools/bash.ts

@@ -324,8 +324,8 @@ export const createBashTool: ToolFactory = (config: ToolConfiguration) => {
             const overflowPolicy = config.overflow_policy ?? "tmpfile";
 
             if (overflowPolicy === "truncate") {
-              // Return truncated output with first 50 lines
-              const maxTruncateLines = 50;
+              // Return truncated output with first 80 lines
+              const maxTruncateLines = 80;
               const truncatedLines = lines.slice(0, maxTruncateLines);
               const truncatedOutput = truncatedLines.join("\n");
               const errorMessage = `[OUTPUT TRUNCATED - ${overflowReason ?? "unknown reason"}]\n\nShowing first ${maxTruncateLines} of ${lines.length} lines:\n\n${truncatedOutput}`;