fix(less-computer): restore OpenCode model discovery and execution

[appergb]

User description

Goal

Restore the OpenCode backend in Less Computer for the 1.3.15-Beta.3 test release:

• detect OpenCode and automatically refresh the account's available models
• provide a localized model-loading/selection UI
• use current OpenCode CLI flags and provider-specific model defaults
• make the text-only Less Computer path usable without unrelated microphone/accessibility permissions
• remove startup/settings stalls caused by synchronous CoreAudio and Keychain access
• prevent the text-submit IPC from aborting on macOS

Dependency

Depends on #839 (6b33ba2), which updates release/updater ownership after the repository transfer and prepares Beta.2. Once #839 lands in beta, this PR naturally reduces to the single OpenCode fix commit.

Compatibility

• Targets beta; no stable-branch merge or release tag is included.
• OpenCode behavior was verified with local OpenCode v1.17.15.
• Claude Code keeps its existing sonnet default.
• Version metadata is synchronized at 1.3.15-Beta.3.

Verification

• npm test — passed (24 frontend/contract tests)
• cargo test --manifest-path src-tauri/Cargo.toml coding_agent:: — passed (43 tests)
• cargo check --manifest-path src-tauri/Cargo.toml --bin openless — passed
• INSTALL=0 ./scripts/build-mac.sh — passed; app and DMG signature checks passed
• Packaged macOS app, exercised through Computer Use:
  • launched and displayed v1.3.15-Beta.3
  • detected OpenCode v1.17.15
  • showed localized loading state and loaded 10 models
  • selected opencode/hy3-free
  • opened Less Computer from Advanced settings
  • sent a real request and received exact response OPENLESS_OPENCODE_APP_OK

Artifact: src-tauri/target/release/bundle/dmg/OpenLess_1.3.15-Beta.3_aarch64.dmg
SHA-256: 58d99962917d9fe4d2b8daa5c6645cd6ae8a65a84e1f6e313a8d41c86e4cab8d

Issue

User-reported beta regression; no linked GitHub issue.

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PR Type

Enhancement, Bug fix, Tests

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Description

• Restore OpenCode model discovery and automatic refresh in settings

• Add model selection UI with localized labels for OpenCode

• Switch OpenCode permission flag to --auto and add --continue for sessions

• Provide text-only entry point for Less Computer without microphone permissions

• Fix AppKit main thread blocking during Keychain, microphone enumeration, and WebKit IPC

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Diagram Walkthrough

flowchart LR
  A[OpenCode Backend] --> B[Model Discovery]
  A --> C[Permission Flag Update --auto]
  A --> D[Session --continue]
  B --> E[Auto-refresh in Settings UI]
  E --> F[Model Selection Dropdown]
  A --> G[Text Entry Point]
  G --> H[Less Computer Panel]
  I[Concurrency Fixes] --> J[Keychain/Mic off Main Thread]
  I --> K[WebKit IPC spawn via Tauri runtime]

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File Walkthrough

	Relevant files
Enhancement	11 files args.rs Add provider-specific model resolver                                          +41/-0    commands.rs Add list-opencode-models Tauri command                                      +36/-18  opencode.rs Implement model discovery, permission flag, session continue +135/-17 qa.rs Add less_computer_window_open command                                        +13/-0    dictation.rs Use provider-specific model resolver                                          +4/-5      Onboarding.tsx Add continue-to-settings button                                                    +19/-0    en.ts Add OpenCode and continue button strings                                  +13/-2    zh-CN.ts Add OpenCode and continue button strings                                  +13/-2    coding-agent.ts Add codingAgentListOpencodeModels IPC wrapper                        +12/-0    less-computer.ts Add lessComputerWindowOpen IPC wrapper                                      +5/-0      CodingAgentSection.tsx OpenCode model selection and refresh UI                                    +157/-18
Bug fix	4 files credentials.rs Make credential commands async with spawn_blocking              +74/-50  misc.rs Make microphone enumeration async                                                +7/-3      coordinator.rs Add less_computer_window_open and fix text-submit spawn    +13/-1    lib.rs Async microphone enumeration, window show fix                        +81/-38
Tests	2 files frontend-test-runner.test.mjs Add contract test discovery                                                            +1/-0      less-computer-opencode-contract.test.mjs New contract test for OpenCode integration                              +123/-0
Additional files	8 files package.json +1/-1      Cargo.toml +1/-1      mod.rs +2/-1      tauri.conf.json +1/-1      ja.ts +13/-2    ko.ts +13/-2    zh-TW.ts +13/-2    index.ts +2/-0

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[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit 3fbf64e)

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis 🔶 839 - Partially compliant Compliant requirements: (empty) Non-compliant requirements: Update all GitHub URLs from appergb to Open-Less (no URL changes in this PR) Bump version to 1.3.15-Beta.2 (version bumped to 1.3.15-Beta.3, not Beta.2) Add repository-owner contract test script (no such test added; a different contract test is added) Requires further human verification: (empty)

⏱️ Estimated effort to review: 3 🔵🔵🔵⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ No major issues detected

[github-actions]

Persistent review updated to latest commit 3fbf64e