fix(install): remove duplicate 'mise' text in install header

[jdx]

Summary

• Fixed UI glitch where install header displayed "mise mise" instead of just "mise"
• The header prefix already contained "mise" in purple color, but normal_prefix() was adding another dimmed "mise"
• Changed new_header() to use pad_prefix() directly to show "mise" only once

Test plan

• Run mise install and verify the header shows "mise" only once in purple color

🤖 Generated with Claude Code

---

Note

Switch new_header to use pad_prefix instead of normal_prefix to avoid duplicating "mise" in the header.

• UI Progress Header:
  • Update src/ui/progress_report.rs new_header to use pad_prefix(pad, &prefix) instead of normal_prefix(pad, &prefix), preventing duplicate "mise" in header prefixes.

^{Written by Cursor Bugbot for commit 716912b. This will update automatically on new commits. Configure here.}

[Copilot]

Pull Request Overview

This PR fixes a UI bug where the install header was displaying "mise mise" instead of just "mise" by replacing the normal_prefix() function call with pad_prefix() in the progress report header creation. The change also introduces a local HTTP test server to replace external dependencies in E2E tests for the tool-stub generation functionality.

• Fixed duplicate "mise" text in install header by using pad_prefix() instead of normal_prefix()
• Added local HTTP test server for E2E testing to avoid external network dependencies
• Updated tool-stub E2E tests to use the local test server instead of httpbin.org

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/ui/progress_report.rs	Changed header prefix function from normal_prefix() to pad_prefix() to fix duplicate text
e2e/helpers/scripts/tool_stub_test_server.py	Added new HTTP test server for E2E testing with mock endpoints
e2e/generate/test_generate_tool_stub	Updated E2E tests to use local test server instead of external httpbin.org

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.24 x -- echo	20.1 ± 0.5	19.1	22.3	1.00
mise x -- echo	20.3 ± 0.4	19.5	22.4	1.01 ± 0.03

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.24 env	19.5 ± 0.5	18.6	24.5	1.00
mise env	19.7 ± 0.4	18.8	21.5	1.01 ± 0.03

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.24 hook-env	18.9 ± 0.3	18.2	20.2	1.00
mise hook-env	19.3 ± 0.7	18.4	24.9	1.02 ± 0.04

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.24 ls	16.7 ± 0.2	16.2	17.7	1.00
mise ls	16.9 ± 0.9	16.2	35.6	1.01 ± 0.06

xtasks/test/perf

Command	mise-2025.9.24	mise	Variance
install (cached)	165ms	✅ 104ms	+58%
ls (cached)	63ms	62ms	+1%
bin-paths (cached)	69ms	69ms	+0%
task-ls (cached)	462ms	476ms	-2%

✅ Performance improvement: install cached is 58%