Cache plan IDs from Atlas create responses

Single-host PUT and bulk POST now extract and store the action_plan_id
from the Atlas API response in the local cache. Previously only a stub
with plan_type/commit_date was  now the actual plan ID iscached
included so it can be referenced for updates/display without re-fetching
from Atlas.

backend/routes/atlas.js

@@ -472,6 +472,45 @@ function createAtlasRouter() {
             if (result.status >= 200 && result.status < 300) {
                 let body;
                 try { body = JSON.parse(result.body); } catch (e) { body = result.body; }
+
+                // Update local cache with the created plan
+                try {
+                    const { rows: existingRows } = await pool.query(
+                        `SELECT plan_count, plans_json FROM atlas_action_plans_cache WHERE host_id = $1`,
+                        [hostId]
+                    );
+                    const existing = existingRows[0];
+                    let existingPlans = [];
+                    if (existing && existing.plans_json) {
+                        try { existingPlans = JSON.parse(existing.plans_json); } catch (_) {}
+                    }
+
+                    // Include the plan ID from Atlas response if available
+                    const newPlan = {
+                        plan_type,
+                        commit_date,
+                        source: 'create',
+                        created_at: new Date().toISOString(),
+                        ...(body?.action_plan_id ? { action_plan_id: body.action_plan_id } : {}),
+                        ...(body?.id ? { action_plan_id: body.id } : {}),
+                    };
+                    const updatedPlans = [...existingPlans, newPlan];
+
+                    await pool.query(
+                        `INSERT INTO atlas_action_plans_cache (host_id, has_action_plan, plan_count, plans_json, atlas_known, synced_at)
+                         VALUES ($1, true, $2, $3, true, NOW())
+                         ON CONFLICT(host_id) DO UPDATE SET
+                             has_action_plan = true,
+                             plan_count = EXCLUDED.plan_count,
+                             plans_json = EXCLUDED.plans_json,
+                             atlas_known = true,
+                             synced_at = EXCLUDED.synced_at`,
+                        [hostId, updatedPlans.length, JSON.stringify(updatedPlans)]
+                    );
+                } catch (cacheErr) {
+                    console.error('[Atlas] Cache update failed after plan create for host', hostId, ':', cacheErr.message);
+                }
+
                 res.status(result.status).json(body);
             } else {
                 let errorBody;
@@ -603,7 +642,27 @@ function createAtlasRouter() {
                             try { existingPlans = JSON.parse(existing.plans_json); } catch (_) {}
                         }
 
-                        const stubPlan = { plan_type, commit_date, source: 'bulk-create', created_at: new Date().toISOString() };
+                        // Extract plan ID from bulk response if available (keyed by host_id)
+                        let planId = null;
+                        if (body && typeof body === 'object') {
+                            // Response may be { results: [{host_id, action_plan_id}] } or { [hostId]: {id} }
+                            if (Array.isArray(body.results)) {
+                                const match = body.results.find(r => r.host_id === hid || r.host_id === String(hid));
+                                if (match) planId = match.action_plan_id || match.id;
+                            } else if (body[hid]) {
+                                planId = body[hid].action_plan_id || body[hid].id;
+                            } else if (body[String(hid)]) {
+                                planId = body[String(hid)].action_plan_id || body[String(hid)].id;
+                            }
+                        }
+
+                        const stubPlan = {
+                            plan_type,
+                            commit_date,
+                            source: 'bulk-create',
+                            created_at: new Date().toISOString(),
+                            ...(planId ? { action_plan_id: planId } : {}),
+                        };
                         const updatedPlans = [...existingPlans, stubPlan];
                         const newCount = updatedPlans.length;