Add Template Mode and enhance parser validation

[M-Nikox]

This pull request introduces a major new feature: Template Mode, which allows users to fully customize the output filename format for renamed files via a flexible template editor. In addition, it includes several parser improvements, enhanced rename safety checks, undo/redo performance and reliability improvements, and dependency updates. Below are the most important changes:

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New Features: Template Mode

• Adds a "Template mode" toggle and TemplateEditor component to the UI, enabling users to define custom output filename formats using tokens (e.g., {Show}, {SeasonZ}, {EpisodeZ}, etc.), with live preview and click-to-insert token chips. The template applies to both auto and manual modes, and a reset button restores the default template ({Show} - S{SeasonZ}E{EpisodeZ}). (CHANGELOG.md [1] src/renderer/App.tsx [2] [3] [4] src/renderer/components/TemplateEditor.tsx [5] src/renderer/hooks/usePreviews.ts [6]
• The preview table and manual mode now always reflect the active template, ensuring consistent output. (src/renderer/App.tsx [1] [2] src/renderer/hooks/usePreviews.ts [3]

Parser and Scanner Improvements

• Adds support for new anime-special and Japanese episode markers, and introduces a warning for trailing episode-like tokens after a match. Hidden files (dotfiles) are now excluded from scan results. (CHANGELOG.md [1] src/main/file-ops/scanner.ts [2]
• Tightens the NNN compact format to reduce false positives from codec tags and year values. (CHANGELOG.md CHANGELOG.mdR7-R52)

Rename Safety and Undo/Redo Reliability

• validateOperation now blocks any rename that would move a file outside its original directory, and explicitly rejects symbolic links as sources. (src/main/file-ops/renamer.ts [1] [2]
• Undo/redo logic is refactored to use an indexed map for O(1) in-place patching of undo log entries, improving performance and correctness, especially for crash-recovery after cycle/swap operations. Pending undo entries are now more accurately detected. (src/main/file-ops/renamer.ts [1] [2] [3] [4] [5]

Dependency Updates

• Updates dependencies to latest versions, including Electron, React, TypeScript, and others. (package.json [1] [2]

Tests

• Adds tests for new parser patterns, trailing-episode-marker warnings, rename preflight blocking, and scanner exclusion of hidden files. (CHANGELOG.md CHANGELOG.mdR7-R52)

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These changes provide powerful new customization options for filename formatting, improve parser accuracy, and make the rename and undo/redo features safer and more robust.

[Copilot]

Pull request overview

This PR introduces Template Mode to let users customize renamed output filenames using token-based templates, while also improving parser accuracy/warnings, scanner filtering, and rename/undo safety and reliability.

Changes:

• Add applyTemplate() + token set and wire template-based naming through renderer previews (auto + manual) with a new TemplateEditor UI.
• Extend filename parser patterns (anime specials, Japanese markers), tighten compact NNN parsing, and surface structured parser warnings in the UI.
• Strengthen file operation safeguards (exclude dotfiles in scanner; block cross-directory moves; improve undo-log patching performance and crash recovery).

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/parser/parser.test.ts	Adds coverage for new parser patterns/warnings and template application behavior.
tests/main/scanner.test.ts	Ensures hidden dotfiles are excluded from scan results.
tests/main/renamer.test.ts	Adds coverage for cross-directory rename blocking.
src/shared/parser/parse-filename.ts	Adds new episode patterns, tightens compact parsing, and emits trailing-marker warnings.
src/shared/parser/build-name.ts	Introduces template tokens, applyTemplate(), and makes buildName() a wrapper over the default template.
src/renderer/hooks/usePreviews.ts	Applies templates to all preview rows (auto/manual) and maps parser warning codes to UI messages.
src/renderer/components/TemplateEditor.tsx	New template editor UI with token chips, reset, and live preview.
src/renderer/App.tsx	Adds template state/mode toggle, shows TemplateEditor, and builds rename destination paths more robustly.
src/main/file-ops/scanner.ts	Skips dotfiles during scanning.
src/main/file-ops/renamer.ts	Blocks cross-directory moves, rejects symlink sources, and optimizes undo-log updates via indexing.
package.json	Bumps app version and updates dependency versions.
CHANGELOG.md	Documents Template Mode, parser/scanner updates, rename safety, undo changes, and tests.

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