fix: resolve 4 bugs in termui

[saurabhhhcodes]

Description

This PR fixes real bugs found in the codebase:

• Prevented interval leak: repeated mounts now clear the previous interval before scheduling a new one.
• Filled empty catch block: silently swallowing the error hides failures; now logs for debugging.
• Added explicit radix to parseInt: without 10, strings like '0x1F' or '08' parse in unintended bases.
• Added explicit radix to parseInt: without 10, strings like '0x1F' or '08' parse in unintended bases.

Type of Change

• Bug fix (non-breaking change fixing an issue)

How Has This Been Tested?

• Local manual testing

Checklist

• My code follows the style guidelines
• I have performed a self-review

Related Issue

Ref: #3559

Summary by CodeRabbit

• Bug Fixes
  • Improved keyboard handling in the showcase and widget gallery examples so numeric keys are interpreted consistently.
  • Made weather updates more reliable by ensuring only one refresh timer runs at a time.
  • Enhanced reload error reporting so failures are surfaced instead of being hidden.

[coderabbitai]

📝 Walkthrough

Walkthrough

This change updates example keyboard parsing to use radix 10, tracks and replaces the weather refresh interval on window.__interval, and logs rejected child-process exit promises during dev-server reload.

Changes

Example runtime fixes

Layer / File(s)	Summary
Input parsing and refresh handling examples/showcase/src/index.tsx, examples/widget-gallery/src/index.ts, examples/weather/src/index.tsx	ShowcaseApp.handleKey and WidgetGalleryApp.handleKey now call parseInt(..., 10). The weather example clears window.__interval before storing and starting a new 5-second interval.

Dev-server reload logging

Layer / File(s)	Summary
Reload error logging packages/dev-server/src/server.ts	The reload handler now logs errors from the awaited child-process exit promise instead of ignoring them.

Estimated code review effort: 2 (Simple) | ~8 minutes

Possibly related PRs

• Karanjot786/TermUI#3553: Directly overlaps the showcase radix fix and the weather interval replacement logic.
• Karanjot786/TermUI#3529: Directly overlaps the showcase radix fix and the dev-server reload error logging change.
• Karanjot786/TermUI#3540: Uses the same interval cleanup pattern in the weather example before scheduling a new timer.

Suggested reviewers: karanjot786

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description covers the fixes and testing but omits required package, GSSoC, and checklist details and does not use the required issue-closing format.	Complete all required template sections, identify affected packages, use Closes #3559``, and mark or explain every checklist and GSSoC item.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the change as a bug fix for four TermUI issues and follows the required type format.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 Biome (2.5.6)

packages/dev-server/src/server.ts

File contains syntax errors that prevent linting: Line 383: Expected a parenthesis '(' but instead found '=>'.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@packages/dev-server/src/server.ts`:
- Line 383: Fix the malformed catch callback in the exitedPromise handling by
declaring a parameter for the rejection value, then preserve the existing
console.error logging using that value.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 2a139afb-c120-4495-a547-298c057e6cbe

📥 Commits

Reviewing files that changed from the base of the PR and between 6c7584e and 40cef89.

📒 Files selected for processing (4)

• examples/showcase/src/index.tsx
• examples/weather/src/index.tsx
• examples/widget-gallery/src/index.ts
• packages/dev-server/src/server.ts

[coderabbitai]

🎯 Functional Correctness | 🔴 Critical | ⚡ Quick win

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

if rg -nP 'exitedPromise\.catch\(\s*=>|catch\(\s*=>' packages/dev-server/src/server.ts; then
  echo "Malformed Promise.catch callback remains" >&2
  exit 1
fi

Repository: Karanjot786/TermUI

Length of output: 261

---

🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf 'File excerpt:\n'
sed -n '375,388p' packages/dev-server/src/server.ts

printf '\nSyntax check with TypeScript if available:\n'
if command -v tsc >/dev/null 2>&1; then
  tmp="$(mktemp -d)/server.ts"
  sed -n '1,420p' packages/dev-server/src/server.ts > "$tmp"
  if tsc --noEmit --strict --target es2022 --module es2022 "$tmp" 2>&1 | grep -n "383"; then
    echo "ERROR"
  else
    echo "No parse error reported at line 383"
  fi
else
  echo "tsc not found"
fi

Repository: Karanjot786/TermUI

Length of output: 920

---

Fix the malformed .catch callback.

packages/dev-server/src/server.ts:383 has invalid TypeScript syntax: catch is missing an argument expression, so the source does not compile. Pass the rejection value to the callback.

Proposed fix

-            await exitedPromise.catch( => console.error());
+            await exitedPromise.catch((error) => console.error(error));

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	await exitedPromise.catch( => console.error());
	await exitedPromise.catch((error) => console.error(error));

🧰 Tools

🪛 Biome (2.5.6)

[error] 383-383: Expected a parenthesis '(' but instead found '=>'.

(parse)

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@packages/dev-server/src/server.ts` at line 383, Fix the malformed catch
callback in the exitedPromise handling by declaring a parameter for the
rejection value, then preserve the existing console.error logging using that
value.

Source: Linters/SAST tools