build: PaddedCell-style install.mjs + SDK-aligned packaging

install.mjs (--install/--build-only/--uninstall/--openclaw-profile-path),
tsconfig outDir dist/fabric, package.json openclaw file dep + main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

dist/fabric/src/fabric-client.js

@@ -0,0 +1,53 @@
+// Thin Fabric REST client. One auth concept: an agent's Center API key is
+// exchanged for a normal user session (POST /auth/agent/login); the returned
+// guild access tokens are used to post messages and call channel APIs.
+export class FabricClient {
+    centerApiBase;
+    constructor(centerApiBase) {
+        this.centerApiBase = centerApiBase;
+    }
+    async post(url, body, auth) {
+        const res = await fetch(url, {
+            method: 'POST',
+            headers: {
+                'content-type': 'application/json',
+                ...(auth ? { authorization: `Bearer ${auth}` } : {}),
+            },
+            body: JSON.stringify(body),
+        });
+        if (!res.ok) {
+            const text = await res.text().catch(() => '');
+            throw new Error(`POST ${url} -> ${res.status} ${text}`);
+        }
+        return (await res.json());
+    }
+    // Exchange an agent API key for a Fabric user session (+ guild tokens).
+    agentLogin(apiKey) {
+        return this.post(`${this.centerApiBase}/auth/agent/login`, { apiKey });
+    }
+    // Refresh the center access token (guild tokens are re-fetched via /auth/me/guilds).
+    async refresh(refreshToken) {
+        return this.post(`${this.centerApiBase}/auth/refresh`, { refreshToken });
+    }
+    async meGuilds(accessToken) {
+        const res = await fetch(`${this.centerApiBase}/auth/me/guilds`, {
+            headers: { authorization: `Bearer ${accessToken}` },
+        });
+        if (!res.ok)
+            throw new Error(`me/guilds -> ${res.status}`);
+        return (await res.json());
+    }
+    // ---- guild-scoped (use the per-guild access token) ----
+    postMessage(guildEndpoint, guildToken, channelId, content, authorUserId) {
+        return this.post(`${guildEndpoint}/api/channels/${channelId}/messages`, { content, authorUserId }, guildToken);
+    }
+    createChannel(guildEndpoint, guildToken, body) {
+        return this.post(`${guildEndpoint}/api/channels`, body, guildToken);
+    }
+    closeChannel(guildEndpoint, guildToken, channelId) {
+        return this.post(`${guildEndpoint}/api/channels/${channelId}/close`, {}, guildToken);
+    }
+    joinChannel(guildEndpoint, guildToken, channelId) {
+        return this.post(`${guildEndpoint}/api/channels/${channelId}/join`, {}, guildToken);
+    }
+}