build(deps): bump actions/setup-node from 4 to 6

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Something is broken or behaves incorrectly
+title: '[BUG] '
+labels: bug
+---
+
+## Environment
+
+- OS / version:
+- BLIP version (About screen or `app-metadata.json`):
+- Install type (dev / NSIS / portable):
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Expected
+
+## Actual
+
+## Logs / screenshots
+
+Paste main process logs or DevTools console if relevant. Redact personal info.
+
+## Checklist
+
+- [ ] I searched existing issues for duplicates.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+  - name: General question
+    url: https://github.com/krwg/BLIP/discussions
+    about: Ask the community (discussions) if you are unsure whether this is a bug.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an improvement or new capability
+title: '[FEATURE] '
+labels: enhancement
+---
+
+## Problem / motivation
+
+What pain point does this solve?
+
+## Proposed solution
+
+## Alternatives considered
+
+## Scope notes
+
+- LAN-only / privacy constraints:
+- Affects main process, renderer, or packaging:
+
+## Checklist
+
+- [ ] I am willing to help implement or test (optional).

.github/dependabot.yml

@@ -0,0 +1,14 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 5
+    labels:
+      - dependencies
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly

.github/pull_request_template.md

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+## Summary
+
+<!-- 1–3 sentences: what & why -->
+
+## Type of change
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Documentation / repo hygiene
+- [ ] Refactor (no user-visible change)
+
+## How tested
+
+<!-- e.g. npm run build, manual steps on Windows -->
+
+## Screenshots (UI)
+
+<!-- delete if N/A -->
+
+## Checklist
+
+- [ ] `npm run build` passes locally (or CI equivalent).
+- [ ] User-visible strings updated in **EN + RU** if applicable (`renderer/i18n.js`).
+- [ ] Linked issue: closes #

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '20'
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build renderer (Vite)
+        run: npm run build

.gitignore

@@ -1,10 +1,3 @@
-node_modules/
-dist/
-dist-electron/
-build/icon.ico
-build/icon.png
-build/tray-16.png
-build/icon.svg
-*.log
-.DS_Store
-Thumbs.db
+node_modules
+dist-electron
+dist

.nvmrc

@@ -0,0 +1 @@
+20

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+Release **version numbers** track [`app-metadata.json`](app-metadata.json) (synced into `package.json` on build).
+
+## [Unreleased]
+
+### Added
+
+- OSS hygiene: Contributing guide (`CONTRIBUTING.md`), Code of Conduct, security policy (`SECURITY.md`), root changelog, architecture doc (`docs/ARCHITECTURE.md`).
+- `.github/workflows/ci.yml` — `npm ci` + `npm run build` on push/PR to `main`/`master`.
+- Issue / PR templates, Dependabot (npm + GitHub Actions), `.nvmrc`, `engines.node` in `package.json`.
+- Tracked backlog files under `issues/` (removed from `.gitignore`).
+
+### Changed
+
+- README: Community section + Node **20+** align with toolchain.
+
+## [0.1.4] — Obsidian
+
+### Added
+
+- Settings **About**: version from app metadata, GitHub link (`openExternal`).
+- Chat history **clear conversation** action (with confirm).
+- Central **`app-metadata.json`** + sync script for `package.json` version.
+
+### Changed
+
+- Main process handles **busy TCP/UDP ports** (`EADDRINUSE`): user dialog + clean exit instead of uncaught exception.
+- Discovery ignores **self-announcements** on any local IPv4 alias (fewer phantom “duplicate self” peers).
+
+### Removed
+
+- In-app UDP/TCP port preset UI (profiles A/B); advanced users use env vars / config as documented.
+
+## Earlier
+
+Prior development history lives in Git commits and GitHub Releases; append older semver sections here when you cut releases.

CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our pledge
+
+We pledge to make participation in our community a harassment-free experience for everyone, regardless of age, body size, visible or invisible disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, caste, color, religion, or sexual identity and orientation.
+
+## Our standards
+
+Examples of behavior that contributes to a positive environment:
+
+- Demonstrating empathy and kindness toward others
+- Being respectful of differing opinions and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing when we affect others, and learning from the experience
+- Focusing on what is best for the community
+
+Examples of unacceptable behavior:
+
+- The use of sexualized language or imagery, and sexual attention or advances of any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others’ private information without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Enforcement
+
+Maintainers are responsible for clarifying and enforcing standards of acceptable behavior. They may take appropriate and fair corrective action in response to behavior that they deem inappropriate, threatening, offensive, or harmful.
+
+## Reporting
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the maintainers via GitHub (issues or direct message if available). All complaints will be reviewed and investigated promptly and fairly.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org), version 2.1.

CONTRIBUTING.md

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+# Contributing to BLIP
+
+Thanks for helping improve BLIP. This project is **GPL-3.0** — your contributions will be under the same license.
+
+## Prerequisites
+
+- **Node.js** ≥ 20 (see `.nvmrc`). Use `nvm use` if you use nvm.
+- **npm** (ships with Node).
+- **Windows** is the primary target today; other platforms may work but are not fully validated in CI.
+
+## Quick setup
+
+```bash
+git clone https://github.com/krwg/BLIP.git
+cd BLIP
+npm ci
+```
+
+## Development
+
+```bash
+npm run electron:dev
+```
+
+This runs Vite and Electron with `BLIP_VITE_DEV=1`. The UI loads from `http://localhost:5173`.
+
+**Second instance** (separate config directory — see `scripts/electron-dev-peer2.mjs`):
+
+```bash
+npm run electron:dev:peer2
+```
+
+## Production-like run
+
+```bash
+npm start
+```
+
+Builds the renderer first (`prestart` → `vite build`), then launches Electron against `dist/`.
+
+## Building installers
+
+Requires Windows for the current electron-builder targets:
+
+```bash
+npm run electron:build        # NSIS installer
+npm run electron:build:portable
+```
+
+Outputs go to `dist-electron/` (see `electron-builder.yml`).
+
+## Version / metadata
+
+- Release version and display metadata live in **`app-metadata.json`**.
+- `npm run build` runs `scripts/sync-app-metadata.mjs` so `package.json`’s `version` stays in sync.
+
+## Code style
+
+- Match existing patterns in `main/` and `renderer/`.
+- Prefer small, focused PRs with a clear **what** and **why**.
+- If you change user-visible strings, update **EN + RU** in `renderer/i18n.js` when applicable.
+
+## Pull requests
+
+1. Fork → branch → push → open PR against `main`.
+2. Ensure **CI is green** (see `.github/workflows/ci.yml`).
+3. Describe behavior change, testing done, and screenshots for UI changes.
+
+## Security
+
+Do **not** open public issues for sensitive vulnerabilities. See [SECURITY.md](SECURITY.md).
+
+## Questions
+
+Open a GitHub issue. If **Discussions** are enabled for this repo, you may ask broader questions there instead.