Add Go wiki engine core with MCP interface and Preact web UI

.devcontainer/Dockerfile

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+FROM debian:bookworm-slim
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        build-essential \
+        curl \
+        wget \
+        pkg-config \
+        libssl-dev \
+        ca-certificates \
+        git \
+        git-lfs \
+        netcat-traditional \
+        sudo \
+    && git lfs install \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+RUN groupadd --force --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME -s /bin/bash || true \
+    && echo "$USERNAME ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME

.devcontainer/devcontainer.json

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+{
+  "name": "mind-map",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "remoteUser": "vscode",
+  "features": {
+    "ghcr.io/devcontainers/features/go:1": {
+      "version": "latest"
+    },
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "lts"
+    },
+    "ghcr.io/devcontainers/features/sshd:1": {
+      "version": "latest"
+    }
+  },
+  "postCreateCommand": "go version && node --version",
+  "postAttachCommand": "npm install --prefix webui",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "golang.Go",
+        "hbenl.vscode-test-explorer",
+        "ethan-reesor.vscode-go-test-adapter",
+        "idered.npm",
+        "qwtel.sqlite-viewer",
+        "dbaeumer.vscode-eslint"
+      ],
+      "settings": {
+        "go.buildTags": "sqlite_fts5",
+        "go.testTags": "sqlite_fts5",
+        "go.buildFlags": ["-tags=sqlite_fts5"],
+        "go.testEnvVars": {
+          "CGO_ENABLED": "1"
+        }
+      }
+    }
+  },
+  "forwardPorts": [8080],
+  "portsAttributes": {
+    "8080": {
+      "label": "mind-map Server",
+      "onAutoForward": "notify"
+    }
+  }
+}

.github/workflows/ci.yml

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+name: CI
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  check:
+    name: Check & Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: Build and test in devcontainer
+        uses: devcontainers/ci@v0.3
+        with:
+          push: never
+          runCmd: |
+            set -e
+
+            # Build webui
+            cd webui && npm install && npm run build && cd ..
+
+            # Go checks
+            CGO_ENABLED=1 go vet -tags sqlite_fts5 ./...
+            CGO_ENABLED=1 go test -tags sqlite_fts5 ./...
+            CGO_ENABLED=1 go build -tags sqlite_fts5 -o /tmp/mind-map ./cmd/mind-map/

.github/workflows/release.yml

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+name: Release
+
+on:
+  release:
+    types: [created]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build release binaries
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Build all targets in devcontainer
+        uses: devcontainers/ci@v0.3
+        with:
+          push: never
+          runCmd: |
+            set -e
+
+            # Build webui first
+            cd webui && npm install && npm run build && cd ..
+
+            # Install cross-compilation toolchain for linux-arm64
+            sudo apt-get update && sudo apt-get install -y gcc-aarch64-linux-gnu
+
+            # Build linux-x64 (native)
+            CGO_ENABLED=1 GOOS=linux GOARCH=amd64 \
+              go build -tags sqlite_fts5 -o mind-map-linux-x64 ./cmd/mind-map/
+
+            # Build linux-arm64 (cross-compile)
+            CGO_ENABLED=1 GOOS=linux GOARCH=arm64 CC=aarch64-linux-gnu-gcc \
+              go build -tags sqlite_fts5 -o mind-map-linux-arm64 ./cmd/mind-map/
+
+            # Package as tarballs
+            tar czf mind-map-linux-x64.tar.gz mind-map-linux-x64
+            tar czf mind-map-linux-arm64.tar.gz mind-map-linux-arm64
+
+      - name: Upload linux-x64
+        uses: softprops/action-gh-release@v3
+        with:
+          files: mind-map-linux-x64.tar.gz
+
+      - name: Upload linux-arm64
+        uses: softprops/action-gh-release@v3
+        with:
+          files: mind-map-linux-arm64.tar.gz
+
+  build-macos:
+    name: Build ${{ matrix.artifact }}
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        include:
+          - target_os: darwin
+            target_arch: amd64
+            artifact: mind-map-darwin-x64
+          - target_os: darwin
+            target_arch: arm64
+            artifact: mind-map-darwin-arm64
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.26'
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+
+      - name: Build webui
+        run: cd webui && npm install && npm run build
+
+      - name: Build
+        env:
+          CGO_ENABLED: '1'
+          GOOS: ${{ matrix.target_os }}
+          GOARCH: ${{ matrix.target_arch }}
+        run: go build -tags sqlite_fts5 -o ${{ matrix.artifact }} ./cmd/mind-map/
+
+      - name: Codesign (ad-hoc)
+        run: codesign -s - ${{ matrix.artifact }} 2>/dev/null || true
+
+      - name: Package binary
+        run: tar czf ${{ matrix.artifact }}.tar.gz ${{ matrix.artifact }}
+
+      - name: Upload release asset
+        uses: softprops/action-gh-release@v3
+        with:
+          files: ${{ matrix.artifact }}.tar.gz
+
+  upload-install-script:
+    name: Upload install scripts
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: Upload install.sh and install.ps1
+        uses: softprops/action-gh-release@v3
+        with:
+          files: |
+            install.sh
+            install.ps1

.gitignore

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+# Build artifacts
+/mind-map
+
+# Wiki database files
+.mind-map.db
+.mind-map.db-shm
+.mind-map.db-wal
+
+# WebUI build output
+webui/dist/
+webui/node_modules/
+
+# VS Code cache
+.vscode/cache/
+__debug_bin*

.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "compounds": [
+        {
+            "name": "mind-map + WebUI",
+            "configurations": [
+                "mind-map Server",
+                "WebUI"
+            ],
+            "stopAll": true
+        }
+    ],
+    "configurations": [
+        {
+            "name": "mind-map Server",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${workspaceFolder}/cmd/mind-map",
+            "args": ["serve", "--addr", ":8080", "--dir", "${workspaceFolder}/testdata", "--webui", "${workspaceFolder}/webui/dist"],
+            "buildFlags": "-tags=sqlite_fts5",
+            "env": {
+                "CGO_ENABLED": "1"
+            },
+            "preLaunchTask": "build-webui"
+        },
+        {
+            "name": "mind-map Server (no WebUI)",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${workspaceFolder}/cmd/mind-map",
+            "args": ["serve", "--addr", ":8080", "--dir", "${workspaceFolder}/testdata", "--webui", "${workspaceFolder}/webui/dist"],
+            "buildFlags": "-tags=sqlite_fts5",
+            "env": {
+                "CGO_ENABLED": "1"
+            }
+        },
+        {
+            "name": "mind-map (stdio)",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${workspaceFolder}/cmd/mind-map",
+            "args": ["serve", "--stdio", "--dir", "${workspaceFolder}/testdata"],
+            "buildFlags": "-tags=sqlite_fts5",
+            "env": {
+                "CGO_ENABLED": "1"
+            }
+        },
+        {
+            "name": "WebUI",
+            "type": "chrome",
+            "request": "launch",
+            "browserLaunchLocation": "ui",
+            "runtimeExecutable": "stable",
+            "url": "http://localhost:8080",
+            "webRoot": "${workspaceFolder}/webui",
+            "preLaunchTask": "waitForServer",
+            "userDataDir": "${workspaceFolder}/.vscode/cache",
+            "sourceMaps": true,
+            "outFiles": [
+                "${workspaceFolder}/webui/dist/**/*.js"
+            ]
+        },
+        {
+            "name": "Test (all)",
+            "type": "go",
+            "request": "launch",
+            "mode": "test",
+            "program": "${workspaceFolder}/internal/wiki",
+            "buildFlags": "-tags=sqlite_fts5",
+            "env": {
+                "CGO_ENABLED": "1"
+            }
+        }
+    ]
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build-webui",
+            "type": "npm",
+            "script": "build",
+            "path": "webui",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "problemMatcher": [],
+            "detail": "Build WebUI with webpack"
+        },
+        {
+            "label": "watch-webui",
+            "type": "npm",
+            "script": "dev",
+            "path": "webui",
+            "group": {
+                "kind": "build",
+                "isDefault": false
+            },
+            "isBackground": true,
+            "problemMatcher": [],
+            "detail": "Watch WebUI with webpack"
+        },
+        {
+            "label": "build-go",
+            "type": "shell",
+            "command": "CGO_ENABLED=1 go build -tags sqlite_fts5 -o ${workspaceFolder}/mind-map ./cmd/mind-map/",
+            "group": "build",
+            "problemMatcher": ["$go"],
+            "detail": "Build Go binary"
+        },
+        {
+            "label": "test",
+            "type": "shell",
+            "command": "CGO_ENABLED=1 go test -v -tags sqlite_fts5 ./...",
+            "group": {
+                "kind": "test",
+                "isDefault": true
+            },
+            "problemMatcher": ["$go"]
+        },
+        {
+            "label": "waitForServer",
+            "type": "shell",
+            "command": "while ! nc -z localhost 8080; do sleep 1; done",
+            "group": "none",
+            "dependsOn": ["build-webui"],
+            "problemMatcher": {
+                "base": "$tsc",
+                "background": {
+                    "beginsPattern": ".*",
+                    "endsPattern": ".*"
+                }
+            }
+        }
+    ]
+}