Add dockable worktree Git inspection

[borisbat]

Summary

• add the dockable dasHerd worktree/status/file-inspector vertical slice on top of the detachable watcher primitive
• prepare diffs asynchronously with compact, expanded, and full-file contexts; synchronized side-by-side scrolling; syntax highlighting; Markdown view; and bundled image previews
• make watcher Git observation robust and inspectable, including Unicode Windows paths and live pane geometry
• extend the terminal host seam needed by watcher-owned structured Git tasks

Validation

• 43 focused watcher, inspection-worker, repository, lifecycle, and UTF-8 file-I/O assertions pass
• Release daslang and daslang-live rebuilt successfully
• live Unicode fixture opens with valid UTF-8 content
• native scrollbar drag verified both panes at the same 2257 / 3904 position
• Ctrl+wheel inspector zoom verified at a 5% step

Dependency

• Complete the diff source viewer slice borisbat/dasImgui#230 provides the source-view and Markdown rendering primitives used by the rich client

[Copilot]

Pull request overview

This PR adds a new “rich” dasHerd watcher client vertical slice for Git worktree/status and file inspection, including a dockable ImGui layout, asynchronous diff/view preparation, and structured Git task execution through watcher-owned terminals. It also extends the terminal host seam (structured argv launching) and strengthens Windows UTF-8 path handling in fio.

Changes:

• Added repository/worktree registration + asynchronous Git observation, exposed via HTTP/WebSocket APIs and consumed by a dockable rich client.
• Implemented file inspection (diff + view) with off-thread parsing/syntax prep and optional binary image previews (base64 transport + stb_image decode).
• Extended the terminal subsystem to support structured argv launches (Windows ConPTY command line building) and improved terminal memory ownership/snapshot disposal.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
utils/dasHerd/WORKTREES_AND_TASK_TERMINALS.md	Updates design notes for repository/worktree identity, observation, and dockspace-based UI.
utils/dasHerd/watcher/watcher_server.das	Adds repository APIs, file inspection flow, and repository snapshot push over WebSocket.
utils/dasHerd/watcher/watcher_core.das	Adds structured argv launches, machine-output helpers, session compaction/pruning, and snapshot disposal fixes.
utils/dasHerd/watcher/tests/test_watcher_core.das	Adds tests for stripping ConPTY wrapper controls and structured argv behavior.
utils/dasHerd/watcher/tests/test_repository_core.das	New tests for parsing Git porcelain inventory/status and diff argv contracts.
utils/dasHerd/watcher/tests/test_inspection_worker.das	New tests for off-thread syntax prep and binary preview decoding contracts.
utils/dasHerd/watcher/tests/test_file_inspection.das	New tests for syntax resolution, unified patch parsing, and load-state behavior.
utils/dasHerd/watcher/rich_client.das	Implements dockable rich client UI, repository/worktree selection, Git status, and file inspector (diff/view).
utils/dasHerd/watcher/repository_core.das	New repository model/config + Git worktree/status observation and diff argv construction.
utils/dasHerd/watcher/README.md	Updates watcher usage/docs for dockable UI, repository config, and file inspection.
utils/dasHerd/watcher/main.das	Adds repository initialization/shutdown and --config support.
utils/dasHerd/watcher/inspection_worker.das	New worker for diff parsing, syntax prep, and optional image decode off-thread.
utils/dasHerd/watcher/image_preview_gl.das	New main-thread GL upload/release bridge for decoded preview pixels.
utils/dasHerd/watcher/file_inspection.das	New unified diff parsing + inspector load-state model + language resolution helpers.
utils/dasHerd/chunk0/git_terminal_window.das	Fixes snapshot disposal and cleans up font sources on shutdown.
tests/fio/fio_utils.das	Adds test asserting UTF-8 Windows paths round-trip through fio ops.
src/builtin/module_builtin_fio.cpp	Implements UTF-8→wide path handling for Windows fopen/stat/remove/rename.
modules/dasTerminal/tests/ownership_semantics.das	New terminal ownership regression test for scrollback/screen row replacement + disposal.
modules/dasTerminal/src/pty.h	Adds argv vector to PTY process options.
modules/dasTerminal/src/pty.cpp	Implements Windows argv→command-line escaping/building for ConPTY.
modules/dasTerminal/src/dasTerminal.cpp	Exposes _pty_launch_argv extern for structured argv launches.
modules/dasTerminal/src/aot_builtin_terminal.h	Declares builtin_pty_launch_argv for AOT.
modules/dasTerminal/daslib/terminal.das	Fixes terminal row ownership/leaks, adds terminal_launch_argv, and adds snapshot dispose helpers.
modules/dasTerminal/CMakeLists.txt	Registers new terminal ownership semantics test.

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[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 3 comments.

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Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated no new comments.