Add runtime file association handling and standalone association prompt for .log and .lo_ files

[Copilot]

tauri.conf.json already registers .log/.lo_ file associations for the installer, but the app had no runtime handler for the file path the OS passes as a CLI argument when a user opens a file via association (double-click, "Open with", etc.). This update also adds a classic CMTrace-style prompt for the standalone Windows executable so users can choose whether to associate log files with CMTrace Open.

Changes

• AppState — added initial_file_path: Mutex<Option<String>> and an explicit new(initial_file_path) constructor so the path is available before the Tauri runtime starts
• lib.rs — reads CLI args before building the Tauri app; first non-flag positional arg is treated as the file path and stored in AppState

  fn get_initial_file_path_from_args() -> Option<String> {
      std::env::args().skip(1).find(|arg| !arg.starts_with('-'))
  }

• file_ops.rs — new get_initial_file_path command that takes and clears the stored path (consumed once)
• src/hooks/use-file-association.ts — new hook that calls get_initial_file_path on mount and routes the path through loadPathAsLogSource, the same flow used by drag-and-drop
• AppShell.tsx — calls useFileAssociation() alongside the existing startup hooks
• src-tauri/src/commands/file_association.rs — new Windows-oriented backend command module to:
  • report whether the standalone association prompt should be shown
  • associate .log and .lo_ with the current executable for the current Windows user
  • persist a Don't Ask Again preference in the app config directory
• src/lib/commands.ts — added frontend wrappers for file-association prompt status, association, and prompt suppression
• src/hooks/use-file-association-prompt.ts — new startup hook that checks whether the standalone association prompt should be shown
• src/components/dialogs/FileAssociationPromptDialog.tsx — new CMTrace-style prompt dialog with Associate, Ask Later, and Don't Ask Again
• src/stores/ui-store.ts / src/hooks/use-keyboard.ts — integrated the new prompt into existing modal state and keyboard dialog-blocking behavior
• src-tauri/Cargo.toml — added the Windows-only winreg dependency for per-user registry-based file association

Validation

• npm ci
• ./node_modules/.bin/tsc --noEmit
• rustfmt --edition 2021 --check --config skip_children=true src/commands/file_association.rs src/lib.rs src/commands/mod.rs

Full cargo check remains blocked in this Linux sandbox because Tauri's GTK/WebKit system libraries are unavailable here.

Screenshot

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[adamgell]

@copilot I want the standalone exe to ask if the user wants to associate. like the old school cmtrace.exe.

[Copilot]

@copilot I want the standalone exe to ask if the user wants to associate. like the old school cmtrace.exe.

Implemented in e530c62. The standalone app now shows a CMTrace-style startup prompt with Associate, Ask Later, and Don't Ask Again, and the Windows backend can register .log/.lo_ for the current user while keeping the existing open-associated-file flow working. Screenshot: https://github.com/user-attachments/assets/539e4c36-03ca-45f0-9e1c-892e366dc54b

[Copilot]

Pull request overview

Adds runtime handling for .log / .lo_ OS file associations (opening an associated file passes a path via CLI args) and introduces a Windows-only “CMTrace-style” prompt to optionally associate those extensions with the standalone executable.

Changes:

• Capture the initial CLI file path in Rust AppState, expose it via a one-time get_initial_file_path command, and open it on the frontend during startup.
• Add a Windows-only backend command module to detect/perform per-user file association and persist a “Don’t ask again” preference.
• Integrate a new startup prompt dialog into existing UI modal state and keyboard dialog-blocking.

Reviewed changes

Copilot reviewed 14 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/stores/ui-store.ts	Adds UI state + actions for the new association prompt modal.
src/lib/commands.ts	Adds frontend invoke wrappers for initial-file-path + association/prompt APIs.
src/hooks/use-keyboard.ts	Treats the association prompt as a modal for shortcut blocking.
src/hooks/use-file-association.ts	Startup hook to consume initial CLI path and open it via existing log-source flow.
src/hooks/use-file-association-prompt.ts	Startup hook to decide whether to show the association prompt.
src/components/layout/AppShell.tsx	Wires in the new hooks and dialog into app startup/layout.
src/components/dialogs/FileAssociationPromptDialog.tsx	Implements the CMTrace-style association prompt UI and actions.
src-tauri/src/state/app_state.rs	Adds initial_file_path storage and explicit constructor to AppState.
src-tauri/src/lib.rs	Parses CLI args before Tauri starts; registers new commands; manages AppState::new.
src-tauri/src/commands/mod.rs	Exposes new file_association command module.
src-tauri/src/commands/file_ops.rs	Adds get_initial_file_path tauri command to consume the stored CLI path.
src-tauri/src/commands/file_association.rs	Windows-only registry association logic + prompt suppression persistence.
src-tauri/Cargo.toml	Adds Windows-only winreg dependency.
src-tauri/Cargo.lock	Locks new Windows dependency graph for winreg and transitive crates.
scripts/Launch-CMTraceOpen.ps1	Adds -OpenPath support and forwards the path into dev/build launch flows.
package-lock.json	Updates lockfile metadata (platform libc fields removed).

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