Fix companion install QR and chat/workspace UX

[MRL-00]

Summary

• Fix LaunchAgent install so the companion server starts and prints the pairing QR/token (pi PATH resolution + agent PATH)
• Name phone-created workspaces with Conductor-style city labels
• Remove session tabs; move model picker under the composer for more typing room
• Surface workspace-create errors in the app

Test plan

• From a clean state: curl -fsSL https://raw.githubusercontent.com/MRL-00/pi-mobile/main/server/install.sh | bash prints listening line, auth token, and QR
• Scan QR (or enter http://<mac>.local:8940 + token) pairs the phone
• Create workspace from phone gets a city name (e.g. Lisbon)
• Chat screen has no Untitled tabs; model pill sits under the composer

Made with Cursor

Summary by CodeRabbit

• New Features
  • Workspace listings now display friendlier names, including labels for phone-created workspaces.
  • Server setup provides clearer pairing instructions when automatic startup is unavailable.
• Bug Fixes
  • Improved API error messages for invalid URLs and server failures.
  • Workspace creation failures now show an alert instead of failing silently.
  • Improved server startup reliability and model discovery across platforms.
• UI Updates
  • Updated chat layout and repositioned model selection controls.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: a10056d9-1650-4332-9e8e-925c69b7bc60

📥 Commits

Reviewing files that changed from the base of the PR and between 15e99f1 and f7b9d05.

📒 Files selected for processing (6)

• .gitignore
• PiMobile/APIClient.swift
• PiMobile/Views/ChatView.swift
• PiMobile/Views/WorkspacesView.swift
• server/install.sh
• server/server.ts

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📝 Walkthrough

Walkthrough

The server now resolves Pi executables, stores user-facing workspace names, and improves LaunchAgent startup reporting. The mobile app adds structured API errors, workspace creation alerts, and revised chat controls. Conductor local settings are ignored.

Changes

Server runtime and workspace flow

Layer / File(s)	Summary
Pi command resolution and execution server/server.ts	Model listing and turn execution use a resolved Pi executable, with model refresh failures preserving the existing cache.
LaunchAgent environment and startup detection server/install.sh	The installer configures LaunchAgent PATH values, bootstraps the service, polls startup logs, and prints pairing details when required.
Persisted workspace names and listings server/server.ts	Project metadata stores workspace names, phone-created worktrees receive city-based labels, and listing responses expose computed labels.

Mobile API and chat experience

Layer / File(s)	Summary
Structured API error responses PiMobile/APIClient.swift	Requests set JSON content types and convert invalid URLs and non-200 responses into localized API errors.
Workspace creation error presentation PiMobile/Views/WorkspacesView.swift	Workspace creation failures are shown in a dismissible alert.
Chat control layout PiMobile/Views/ChatView.swift	The model pill is repositioned, chat tab management is removed, and composer spacing is adjusted.

Local configuration exclusions

Layer / File(s)	Summary
Conductor local settings ignores .gitignore	Conductor local TOML and JSON settings files are excluded from version control.

Estimated code review effort: 4 (Complex) | ~45 minutes

Possibly related PRs

• MRL-00/pi-mobile#8: Related backend implementation for persisted project metadata and workspace handling.

✨ Finishing Touches

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🧪 Generate unit tests (beta)

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• Commit unit tests in branch run-app-on-simulator

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