Add backend-driven history filters and GitKraken-style graph enhancements

[hoangsvit]

Motivation

• Provide richer, Git-backed commit graph filtering and search so users can narrow history by branch/author/date/keyword/file and keep the UI responsive for large repos.
• Keep the existing Tauri/Rust/React architecture and wire filters to real Git commands via the backend so UI controls reflect actual repo history.

Description

• Extended the Tauri get_history command to accept filter parameters and build a git log --graph --decorate argument list supporting --author, --since, --until, --grep, branch/ref selection, and file path filtering. (src-tauri/src/commands/history.rs)
• Updated the frontend RPC surface and types with a HistoryFilters type and changed gitService.getHistory to send filters and increase the default page size to 500 commits. (src/types/git.ts, src/services/gitService.ts)
• Added store support for historyLimit/historyFilters and a loadHistory action that preserves filters and supports loading more commits. (src/store/gitStore.ts)
• Enhanced the commit graph UI to expose search and filter controls (author, ref, since/until, keyword, file path), show more refs on commits, scroll/highlight the selected commit, and add a Load 500 more commits action. (src/components/graph/GitGraph.tsx)

Testing

• Ran npm ci successfully in the workspace.
• Ran npm run typecheck (tsc --noEmit) and it passed.
• Ran npm run build (frontend vite build) and it succeeded.
• Ran cargo fmt --manifest-path src-tauri/Cargo.toml --check and git diff --check, both passed.
• Ran npm run tauri:check locally but cargo check failed due to a missing system glib-2.0 pkg-config dependency in this container (CI installs Tauri Linux system deps before running the check); frontend and non-system Rust checks completed successfully.

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