Professionalize repository and sanitize demo data

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Report a reproducible Gridnote defect.
+title: "[Bug]: "
+labels: [bug]
+body:
+  - type: markdown
+    attributes:
+      value: "Do not include book contents, private files, access bookmarks, or credentials."
+  - type: input
+    id: version
+    attributes:
+      label: Version or commit
+      placeholder: "v0.1.0 or c89333f"
+    validations:
+      required: true
+  - type: input
+    id: macos
+    attributes:
+      label: macOS version and hardware
+      placeholder: "macOS 27 beta, Apple Silicon"
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      placeholder: "1. Import a sample TXT..."
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+    validations:
+      required: true
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Security report
+    url: https://github.com/ZOB2077/Gridnote/security/advisories/new
+    about: Report vulnerabilities privately under the security policy.
+  - name: Commercial licensing
+    url: https://github.com/ZOB2077
+    about: Contact the copyright holder for commercial licensing.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,24 @@
+name: Feature request
+description: Suggest a focused improvement to Gridnote.
+title: "[Feature]: "
+labels: [enhancement]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem to solve
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed behavior
+    validations:
+      required: true
+  - type: textarea
+    id: boundaries
+    attributes:
+      label: Scope and privacy impact
+      description: "Explain whether this affects local-only behavior, supported formats, or office presentation."
+    validations:
+      required: true

.github/pull_request_template.md

@@ -0,0 +1,14 @@
+## Summary
+
+Describe the user-visible change and why it is needed.
+
+## Validation
+
+- [ ] I ran the relevant unit tests.
+- [ ] I performed manual verification where UI behavior changed.
+- [ ] I updated documentation and release notes when needed.
+
+## Scope And Privacy
+
+- [ ] This change adds no network, analytics, DRM, private API, or office-vendor trademark dependency.
+- [ ] This pull request does not contain private books, credentials, or generated build artifacts.

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: macOS CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  unit-tests:
+    name: Build and unit test
+    runs-on: macos-26
+    timeout-minutes: 20
+    steps:
+      - name: Check out source
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Show Xcode version
+        run: xcodebuild -version
+      - name: Build release configuration
+        run: >-
+          xcodebuild -project Gridnote.xcodeproj -scheme Gridnote
+          -configuration Release -destination 'platform=macOS'
+          CODE_SIGNING_ALLOWED=NO build
+      - name: Build and run unit tests
+        run: >-
+          xcodebuild -project Gridnote.xcodeproj -scheme Gridnote
+          -destination 'platform=macOS'
+          -parallel-testing-enabled NO
+          -skip-testing:GridnoteUITests
+          -skip-testing:GridnoteTests/ReleaseFixtureTests/testLargeTXTParserPerformanceSmoke
+          test

CHANGELOG.md

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+# Changelog
+
+All notable changes are documented in this file. Gridnote follows [Semantic Versioning](https://semver.org/) for public releases where practical.
+
+## [0.1.0] - 2026-07-13
+
+### Added
+
+- Local TXT and non-DRM EPUB import, parsing, search, bookmarks, and persistent reading locations.
+- Original office-style phone-rental data workspace with formula-bar reading presentation.
+- Floating reader, Super Stealth mode, configurable appearance, progress indicator, and menu-bar controls.
+- Default shortcut profile: `F7` previous, `F8` next, and `F9` show or hide the floating reader.
+- Per-book aliases, local workbook titles, dense synthetic office templates, and privacy shielding when the app loses focus.
+- Source-available non-commercial license and commercial-licensing path.
+
+### Changed
+
+- Office formula-bar navigation and the floating reader now synchronize reading progress in both directions.
+- The office workspace uses an original presentation and does not expose book text inside spreadsheet cells.
+
+### Known Limitations
+
+- PDF, cloud sync, network features, accounts, DRM handling, XLSX compatibility, notarization, and global shortcuts are not included.
+
+[0.1.0]: https://github.com/ZOB2077/Gridnote/releases/tag/v0.1.0

CODE_OF_CONDUCT.md

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+# Code Of Conduct
+
+## Our Pledge
+
+We are committed to a respectful, professional, and inclusive community. Harassment, personal attacks, discrimination, threats, doxxing, and deliberately disruptive behavior are not acceptable.
+
+## Expected Behavior
+
+- Focus feedback on code, product behavior, and evidence.
+- Respect differing experience levels and communicate in good faith.
+- Protect private reading material, personal data, and security-sensitive details.
+
+## Unacceptable Behavior
+
+- Harassment, hateful conduct, intimidation, or unwanted sexual attention.
+- Publishing private information without permission.
+- Submitting malicious code, pirated material, DRM-circumvention tools, or content intended to bypass platform protections.
+
+## Enforcement
+
+Report conduct concerns privately through the repository owner's GitHub profile: [ZOB2077](https://github.com/ZOB2077). Reports will be reviewed in good faith. Responses may include a warning, removal of content, temporary restriction, or permanent ban.

CONTRIBUTING.md

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+# Contributing To Gridnote
+
+Thank you for improving Gridnote. Contributions are reviewed for product fit, privacy impact, maintenance cost, and compatibility with the source-available license.
+
+## Before You Start
+
+- Read [PRODUCT_SPEC.md](PRODUCT_SPEC.md), [ARCHITECTURE.md](ARCHITECTURE.md), and [AGENTS.md](AGENTS.md).
+- Search existing issues and pull requests before opening a new one.
+- Discuss substantial features in an issue before implementation. Keep pull requests narrowly scoped.
+- Do not add networking, analytics, DRM handling, private APIs, or office-suite trademark assets.
+- Use synthetic fixtures only. Never commit real business data, private books, customer records, or screenshots containing them.
+
+## Development Setup
+
+1. Fork and clone the repository.
+2. Open `Gridnote.xcodeproj` in Xcode 27 beta.
+3. Select the `Gridnote` scheme and run it on macOS.
+4. Run the unit-test command from the README before submitting a pull request.
+
+## Pull Request Expectations
+
+- Describe the user-visible behavior and technical approach.
+- Add or update unit tests for changed business logic.
+- Keep parser, persistence, and UI responsibilities separate.
+- Update documentation when behavior, shortcuts, support boundaries, or release status change.
+- Do not include build products, DerivedData, local test fixtures containing private material, or unrelated formatting churn.
+
+## Commit Style
+
+Use concise imperative subjects, such as `Synchronize office and floating reader progress`. Prefer one logical change per commit when practical.
+
+## Contributor License Grant
+
+By submitting a contribution, you confirm that you have the right to submit it and agree to the contribution terms in [LICENSE](LICENSE), including the copyright holder's right to use and commercialize accepted contributions as part of Gridnote.
+
+## Reporting Problems
+
+Use the bug-report template for reproducible defects. Do not include book contents, personally identifiable information, or private source files in public issues. Security-sensitive reports must follow [SECURITY.md](SECURITY.md).

Gridnote.xcodeproj/project.pbxproj

@@ -319,8 +319,8 @@
 /* Begin XCBuildConfiguration section */
 		B10000000000000000000001 /* Debug */ = {isa = XCBuildConfiguration; buildSettings = { ALWAYS_SEARCH_USER_PATHS = NO; MACOSX_DEPLOYMENT_TARGET = 26.0; SDKROOT = macosx; SWIFT_VERSION = 6.0; }; name = Debug; };
 		B10000000000000000000002 /* Release */ = {isa = XCBuildConfiguration; buildSettings = { ALWAYS_SEARCH_USER_PATHS = NO; MACOSX_DEPLOYMENT_TARGET = 26.0; SDKROOT = macosx; SWIFT_VERSION = 6.0; }; name = Release; };
-		B10000000000000000000003 /* Gridnote Debug */ = {isa = XCBuildConfiguration; buildSettings = { ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon; CLANG_ENABLE_MODULES = YES; CODE_SIGN_STYLE = Automatic; CURRENT_PROJECT_VERSION = 1; ENABLE_TESTABILITY = YES; EXECUTABLE_NAME = DataHub; GENERATE_INFOPLIST_FILE = NO; INFOPLIST_FILE = Gridnote/Info.plist; LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks"; MACOSX_DEPLOYMENT_TARGET = 26.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.app; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_EMIT_LOC_STRINGS = YES; SWIFT_VERSION = 6.0; }; name = Debug; };
-		B10000000000000000000004 /* Gridnote Release */ = {isa = XCBuildConfiguration; buildSettings = { ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon; CLANG_ENABLE_MODULES = YES; CODE_SIGN_STYLE = Automatic; CURRENT_PROJECT_VERSION = 1; ENABLE_TESTABILITY = YES; EXECUTABLE_NAME = DataHub; GENERATE_INFOPLIST_FILE = NO; INFOPLIST_FILE = Gridnote/Info.plist; LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks"; MACOSX_DEPLOYMENT_TARGET = 26.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.app; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_EMIT_LOC_STRINGS = YES; SWIFT_VERSION = 6.0; }; name = Release; };
+		B10000000000000000000003 /* Gridnote Debug */ = {isa = XCBuildConfiguration; buildSettings = { ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon; CLANG_ENABLE_MODULES = YES; CODE_SIGN_STYLE = Automatic; CURRENT_PROJECT_VERSION = 1; ENABLE_TESTABILITY = YES; EXECUTABLE_NAME = DataHub; GENERATE_INFOPLIST_FILE = NO; INFOPLIST_FILE = Gridnote/Info.plist; LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks"; MACOSX_DEPLOYMENT_TARGET = 26.0; MARKETING_VERSION = 0.1.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.app; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_EMIT_LOC_STRINGS = YES; SWIFT_VERSION = 6.0; }; name = Debug; };
+		B10000000000000000000004 /* Gridnote Release */ = {isa = XCBuildConfiguration; buildSettings = { ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon; CLANG_ENABLE_MODULES = YES; CODE_SIGN_STYLE = Automatic; CURRENT_PROJECT_VERSION = 1; ENABLE_TESTABILITY = YES; EXECUTABLE_NAME = DataHub; GENERATE_INFOPLIST_FILE = NO; INFOPLIST_FILE = Gridnote/Info.plist; LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks"; MACOSX_DEPLOYMENT_TARGET = 26.0; MARKETING_VERSION = 0.1.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.app; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_EMIT_LOC_STRINGS = YES; SWIFT_VERSION = 6.0; }; name = Release; };
 		B10000000000000000000005 /* GridnoteTests Debug */ = {isa = XCBuildConfiguration; buildSettings = { BUNDLE_LOADER = "$(TEST_HOST)"; CODE_SIGN_STYLE = Automatic; GENERATE_INFOPLIST_FILE = YES; MACOSX_DEPLOYMENT_TARGET = 26.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.tests; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_VERSION = 6.0; TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Gridnote.app/Contents/MacOS/DataHub"; }; name = Debug; };
 		B10000000000000000000006 /* GridnoteTests Release */ = {isa = XCBuildConfiguration; buildSettings = { BUNDLE_LOADER = "$(TEST_HOST)"; CODE_SIGN_STYLE = Automatic; GENERATE_INFOPLIST_FILE = YES; MACOSX_DEPLOYMENT_TARGET = 26.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.tests; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_VERSION = 6.0; TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Gridnote.app/Contents/MacOS/DataHub"; }; name = Release; };
 		B10000000000000000000007 /* GridnoteUITests Debug */ = {isa = XCBuildConfiguration; buildSettings = { CODE_SIGN_STYLE = Automatic; GENERATE_INFOPLIST_FILE = YES; MACOSX_DEPLOYMENT_TARGET = 26.0; PRODUCT_BUNDLE_IDENTIFIER = com.gridnote.uitests; PRODUCT_NAME = "$(TARGET_NAME)"; SDKROOT = macosx; SWIFT_VERSION = 6.0; TEST_TARGET_NAME = Gridnote; }; name = Debug; };