fix(win32): path handling

[Hona]

~75% of this PR is test code

• Add @/util/path module that normalizes all paths to POSIX format (/) on Windows
• Replace native path imports across 126 files
• Enable full CI test suite on Windows (was previously skipped)
• Handle Git Bash/MSYS paths (/c/Users/... → C:/Users/...)
• Add --path-separator=/ to ripgrep for consistent output

From the new architecture tests to help force pit of success down the line:

// Canonical rule: paths are POSIX/Bash-compatible everywhere.
// Why: Windows backslashes caused
// - UI file search/filter mismatches (client query used "\" while indexed paths used "/")
// - server/client path comparisons to fail (drive/UNC edge cases)
// - bash tool arg parsing to mis-handle paths ("\" is an escape in bash)
// Enforcement via import boundaries:
// - opencode/src must use @/util/path (Node wrapper + /tmp mapping)
// - app/ui/web/sdk/desktop/plugin must use @opencode-ai/util/path (browser-safe)
// - native path/node:path imports are disallowed everywhere

For me to manually test each one by one:

Fixes

Core Path Normalization

• Fixes LSP fails on Windows due to path mismatch errors #11045
  • test/lsp/document-symbol-paths.test.ts → "windows: converts file:// URI to drive-letter path"
  • test/tool/diagnostics-paths.test.ts → "accepts posix diagnostics keys", "windows: accepts canonical diagnostics keys"
• Fixes Glob tool fails on Windows MSYS systems / git bash #11044
  • test/tool/glob-paths.test.ts → "windows: accepts MSYS-style absolute search paths"
  • test/tool/grep-paths.test.ts → "windows: accepts MSYS-style absolute search paths"
  • test/util/path.test.ts → "converts Git Bash / MSYS paths", "normalize() converts MSYS roots"
• Fixes Segfault on Windows git bash (msys) when using bash tool with cwd #11043
  • test/tool/bash.test.ts → "resolves relative workdir against Instance.directory", "throws on invalid workdir"
  • test/server/pty.test.ts → "throws for invalid cwd"
  • test/tool/bash-paths.test.ts → "converts MSYS paths to drive-letter posix", "preserves UNC shares"
• Fixes External directory permission does not work on Windows #11042
  • test/tool/external-directory.test.ts → "windows: normalizes MSYS-style absolute targets"
  • test/permission/next.test.ts → "evaluate - matches stored backslash patterns", "evaluate - matches case-insensitively"
• Fixes Path Display Chaos on Windows #11827
  • test/util/path.test.ts → "normalizes standard paths", "joins with forward slashes", "resolve() output contains no backslashes", "handles mixed slashes"
  • test/util/no-native-path-imports.test.ts → "repo source avoids native path imports"
  • test/worktree/worktree-paths.test.ts → "remove matches worktrees case-insensitively", "reset blocks primary workspace case-insensitively"
• Fixes Windows: Git Bash auto-detection derives invalid bash.exe path #10871
  • test/tool/bash-paths.test.ts → "converts MSYS paths to drive-letter posix"
  • test/util/path.test.ts → "converts Git Bash / MSYS paths"
• Fixes bash tool: external_directory prompt skipped when realpath is missing #10872
  • test/tool/bash.test.ts → "asks for external_directory permission even when PATH is broken"
• Fixes [BUG] TUI session_diff tracking not working on Windows - files remain empty #10716
  • test/server/session-list.test.ts → "filters by directory with trailing separator"
  • test/project/instance-paths.test.ts → "canonicalizes short and long paths to same directory"
• Fixes Bug: permission pathing crossplatform #7279
  • test/permission/next.test.ts → "fromConfig - normalizes windows-style backslashes for path permissions", "fromConfig - normalizes MSYS roots for path permissions", "evaluate - matches stored backslash patterns for path permissions", "evaluate - matches case-insensitively for path permissions"
• Fixes Enter_Plan tool cannot edit windows url pathed files. #8567
  • test/tool/edit-paths.test.ts → "windows: accepts MSYS-style absolute file paths"
  • test/tool/write-paths.test.ts → "windows: accepts MSYS-style absolute file paths"
  • test/tool/multiedit-paths.test.ts → "windows: accepts MSYS-style absolute file paths"

LSP & Ripgrep

• Fixes lsp_tools_show_incorrect_status_on_Windows #11400
  • test/lsp/document-symbol-paths.test.ts → "windows: converts file:// URI to drive-letter path"
  • test/lsp/index.test.ts → "skips servers with invalid roots"
  • test/tool/diagnostics-paths.test.ts → "accepts posix diagnostics keys", "windows: accepts canonical diagnostics keys"
• Fixes OpenCode Desktop Windows ripgrep always fail #5727
  • test/tool/grep-paths.test.ts → "windows: accepts MSYS-style absolute search paths"
  • test/file/ripgrep.test.ts (updated with toPosix)

Glob/File Operations

• Fixes file path globs aren't properly parsed in the config instructions field #11317
  • test/config/config.test.ts → "windows: handles file inclusion substitution with MSYS absolute paths"
  • test/util/filesystem.test.ts → "globUp() returns posix absolute paths on Windows"
• Fixes [Bug] Global commands/ directory not recognized on Windows, only command/ works #9335
  • test/config/config.test.ts → "windows: loads commands when instance directory is MSYS path"
• Fixes Windows: Preparing apply_patch... Error: apply_patch verification failed: F #11687
  • test/tool/diagnostics-paths.test.ts → "accepts posix diagnostics keys", "windows: accepts canonical diagnostics keys"
  • test/tool/edit-paths.test.ts → "windows: accepts MSYS-style absolute file paths"
• Fixes Windows apply_patch fails #10360
  • test/util/path.test.ts → "windows: converts extended-length drive paths", "windows: converts extended-length UNC paths"
  • test/tool/bash-paths.test.ts → "never returns backslashes"

Permission/Security

• Fixes Path traversal vulnerability via symlinks and cross-drive paths #8313
  • test/file/path-traversal.test.ts → "windows: blocks cross-drive paths", "windows: treats UNC shares as distinct roots"
• Fixes Permission check for tool-output directory never matches, causes hang in headless mode #7876
  • test/permission/next.test.ts → "fromConfig - normalizes windows-style backslashes for path permissions", "fromConfig - normalizes MSYS roots for path permissions", "evaluate - matches stored backslash patterns for path permissions", "evaluate - matches case-insensitively for path permissions"

---

New Test Files Added (16)

• test/lsp/document-symbol-paths.test.ts
• test/lsp/index.test.ts
• test/project/instance-paths.test.ts
• test/server/pty.test.ts
• test/session/prompt.test.ts
• test/tool/bash-paths.test.ts
• test/tool/diagnostics-paths.test.ts
• test/tool/edit-paths.test.ts
• test/tool/glob-paths.test.ts
• test/tool/grep-paths.test.ts
• test/tool/lsp-paths.test.ts
• test/tool/multiedit-paths.test.ts
• test/tool/write-paths.test.ts
• test/util/no-native-path-imports.test.ts
• test/util/path.test.ts
• test/worktree/worktree-paths.test.ts

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