feat(P05): ship infrastructure — Gitea API client, release notes, npm publishConfig, ciagent projects cmd, --project flag

---ci---
phase: 5
milestone: v1.0
plan: 05
task: SHIP-01-04 MULTI-01 MULTI-02
status: execute
---/ci---

src/core/gitea.ts

@@ -0,0 +1,170 @@
+import { execSync } from "node:child_process";
+
+export interface GiteaReleaseConfig {
+  baseUrl: string;
+  token: string;
+  owner: string;
+  repo: string;
+}
+
+export interface GiteaRelease {
+  id: number;
+  tag_name: string;
+  name: string;
+  body: string;
+  url: string;
+  html_url: string;
+  draft: boolean;
+  prerelease: boolean;
+}
+
+export class GiteaClient {
+  private config: GiteaReleaseConfig;
+
+  constructor(config: GiteaReleaseConfig) {
+    this.config = config;
+  }
+
+  async createRelease(params: {
+    tag_name: string;
+    name: string;
+    body: string;
+    draft?: boolean;
+    prerelease?: boolean;
+  }): Promise<GiteaRelease> {
+    const url = `${this.config.baseUrl}/api/v1/repos/${this.config.owner}/${this.config.repo}/releases`;
+    const response = await fetch(url, {
+      method: "POST",
+      headers: {
+        "Authorization": `token ${this.config.token}`,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({
+        tag_name: params.tag_name,
+        name: params.name,
+        body: params.body,
+        draft: params.draft ?? false,
+        prerelease: params.prerelease ?? false,
+      }),
+    });
+
+    if (!response.ok) {
+      const text = await response.text();
+      throw new Error(`Gitea API error: ${response.status} ${text}`);
+    }
+
+    return response.json() as Promise<GiteaRelease>;
+  }
+
+  async listReleases(): Promise<GiteaRelease[]> {
+    const url = `${this.config.baseUrl}/api/v1/repos/${this.config.owner}/${this.config.repo}/releases`;
+    const response = await fetch(url, {
+      method: "GET",
+      headers: {
+        "Authorization": `token ${this.config.token}`,
+      },
+    });
+
+    if (!response.ok) {
+      throw new Error(`Gitea API error: ${response.status}`);
+    }
+
+    return response.json() as Promise<GiteaRelease[]>;
+  }
+
+  async getReleaseByTag(tag: string): Promise<GiteaRelease | null> {
+    const url = `${this.config.baseUrl}/api/v1/repos/${this.config.owner}/${this.config.repo}/releases/tags/${tag}`;
+    const response = await fetch(url, {
+      method: "GET",
+      headers: {
+        "Authorization": `token ${this.config.token}`,
+      },
+    });
+
+    if (response.status === 404) {
+      return null;
+    }
+
+    if (!response.ok) {
+      throw new Error(`Gitea API error: ${response.status}`);
+    }
+
+    return response.json() as Promise<GiteaRelease>;
+  }
+}
+
+export function generateReleaseNotes(projectPath: string, fromTag: string | null, toTag: string): string {
+  let gitLogCmd: string;
+  if (fromTag) {
+    gitLogCmd = `git log ${fromTag}..${toTag} --oneline`;
+  } else {
+    gitLogCmd = `git log ${toTag} --oneline`;
+  }
+
+  let logOutput: string;
+  try {
+    logOutput = execSync(gitLogCmd, { cwd: projectPath, encoding: "utf-8" }).trim();
+  } catch {
+    return `## What's Changed\n\nNo commits found between ${fromTag || "beginning"} and ${toTag}.\n`;
+  }
+
+  if (!logOutput) {
+    return `## What's Changed\n\nNo commits found between ${fromTag || "beginning"} and ${toTag}.\n`;
+  }
+
+  const lines = logOutput.split("\n").filter(Boolean);
+
+  const featCommits: string[] = [];
+  const fixCommits: string[] = [];
+  const testCommits: string[] = [];
+  const otherCommits: string[] = [];
+
+  for (const line of lines) {
+    const subject = line.replace(/^[a-f0-9]+\s+/, "");
+    if (/^feat/i.test(subject)) {
+      featCommits.push(subject);
+    } else if (/^fix/i.test(subject)) {
+      fixCommits.push(subject);
+    } else if (/^test/i.test(subject)) {
+      testCommits.push(subject);
+    } else {
+      otherCommits.push(subject);
+    }
+  }
+
+  const sections: string[] = [];
+
+  if (featCommits.length > 0) {
+    sections.push("### New Features\n");
+    for (const c of featCommits) {
+      sections.push(`- ${c}`);
+    }
+    sections.push("");
+  }
+
+  if (fixCommits.length > 0) {
+    sections.push("### Bug Fixes\n");
+    for (const c of fixCommits) {
+      sections.push(`- ${c}`);
+    }
+    sections.push("");
+  }
+
+  if (testCommits.length > 0) {
+    sections.push("### Tests\n");
+    for (const c of testCommits) {
+      sections.push(`- ${c}`);
+    }
+    sections.push("");
+  }
+
+  if (otherCommits.length > 0) {
+    sections.push("### Other Changes\n");
+    for (const c of otherCommits) {
+      sections.push(`- ${c}`);
+    }
+    sections.push("");
+  }
+
+  return `## What's Changed\n\n${sections.join("\n")}`;
+}