fix(ssh): stabilize SSH remote execution across wizard, file browser, and process manager

- Added extensive DEBUG-level logging for SSH command execution, spawn details, exit codes, and configuration flow
- Improved Wizard SSH remote support:
  - Debounced remote directory validation to reduce excessive SSH calls
  - Fixed git.isRepo() to correctly pass remoteCwd for remote checks
  - Persisted SSH config in SerializableWizardState and validated directories over SSH
  - Ensured ConversationScreen and ConversationSession consistently pass SSH config for remote agent execution
  - Fixed "agent not available" errors by forwarding stdin via exec and enabling stream-json mode for large prompts
- Enhanced remote agent execution logic in ProcessManager with stdin streaming, exec-based forwarding, and useStdin flag
- Improved SSH file browser behavior:
  - Added resolveSshPath() to locate SSH binaries on Windows (Electron spawn PATH issue)
  - Corrected getSshContext() handling of enabled/remoteId states
  - Ensured synopsis background tasks run via SSH instead of local paths
- Added Windows development improvements: dev:win script and PowerShell launcher for separate renderer/main terminals
- Added additional SSH directory debugging logs for remote-fs and wizard flows

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package.json

@@ -23,6 +23,7 @@
     "dev:main:prod-data": "npm run build:prompts && tsc -p tsconfig.main.json && npm run build:preload && NODE_ENV=development USE_PROD_DATA=1 electron .",
     "dev:renderer": "vite",
     "dev:web": "vite --config vite.config.web.mts",
+    "dev:win": "powershell -NoProfile -ExecutionPolicy Bypass -File ./scripts/start-dev.ps1",
     "build": "npm run build:prompts && npm run build:main && npm run build:preload && npm run build:renderer && npm run build:web && npm run build:cli",
     "build:prompts": "node scripts/generate-prompts.mjs",
     "build:main": "tsc -p tsconfig.main.json",