refactor: break up app.js into smaller modules

Split static/js/app.js (581 lines) into 5 focused modules:
- utils.js: global utilities store + legacy compat
- components.js: reusable Alpine.js components (copy, confirm, dismiss, time)
- app-detail.js: app detail page logic (status polling, logs)
- deployment.js: deployment card + deployments history page
- dashboard.js: dashboard relative time updates

Closes #128

static/js/app-detail.js

@@ -0,0 +1,194 @@
+/**
+ * upaas - App Detail Page Component
+ *
+ * Handles the single-app view: status polling, container logs,
+ * build logs, and recent deployments list.
+ */
+
+document.addEventListener("alpine:init", () => {
+  Alpine.data("appDetail", (config) => ({
+    appId: config.appId,
+    currentDeploymentId: config.initialDeploymentId,
+    appStatus: config.initialStatus || "unknown",
+    containerLogs: "Loading container logs...",
+    containerStatus: "unknown",
+    buildLogs: config.initialDeploymentId
+      ? "Loading build logs..."
+      : "No deployments yet",
+    buildStatus: config.initialBuildStatus || "unknown",
+    showBuildLogs: !!config.initialDeploymentId,
+    deploying: false,
+    deployments: [],
+    // Track whether user wants auto-scroll (per log pane)
+    _containerAutoScroll: true,
+    _buildAutoScroll: true,
+    _pollTimer: null,
+
+    init() {
+      this.deploying = Alpine.store("utils").isDeploying(this.appStatus);
+      this.fetchAll();
+      this._schedulePoll();
+
+      // Set up scroll listeners after DOM is ready
+      this.$nextTick(() => {
+        this._initScrollTracking(this.$refs.containerLogsWrapper, '_containerAutoScroll');
+        this._initScrollTracking(this.$refs.buildLogsWrapper, '_buildAutoScroll');
+      });
+    },
+
+    _schedulePoll() {
+      if (this._pollTimer) clearTimeout(this._pollTimer);
+      const interval = Alpine.store("utils").isDeploying(this.appStatus) ? 1000 : 10000;
+      this._pollTimer = setTimeout(() => {
+        this.fetchAll();
+        this._schedulePoll();
+      }, interval);
+    },
+
+    _initScrollTracking(el, flag) {
+      if (!el) return;
+      el.addEventListener('scroll', () => {
+        this[flag] = Alpine.store("utils").isScrolledToBottom(el);
+      }, { passive: true });
+    },
+
+    fetchAll() {
+      this.fetchAppStatus();
+      // Only fetch logs when the respective pane is visible
+      if (this.$refs.containerLogsWrapper && this._isElementVisible(this.$refs.containerLogsWrapper)) {
+        this.fetchContainerLogs();
+      }
+      if (this.showBuildLogs && this.$refs.buildLogsWrapper && this._isElementVisible(this.$refs.buildLogsWrapper)) {
+        this.fetchBuildLogs();
+      }
+      this.fetchRecentDeployments();
+    },
+
+    _isElementVisible(el) {
+      if (!el) return false;
+      // Check if element is in viewport (roughly)
+      const rect = el.getBoundingClientRect();
+      return rect.bottom > 0 && rect.top < window.innerHeight;
+    },
+
+    async fetchAppStatus() {
+      try {
+        const res = await fetch(`/apps/${this.appId}/status`);
+        const data = await res.json();
+        const wasDeploying = this.deploying;
+        this.appStatus = data.status;
+        this.deploying = Alpine.store("utils").isDeploying(data.status);
+
+        // Re-schedule polling when deployment state changes
+        if (this.deploying !== wasDeploying) {
+          this._schedulePoll();
+        }
+
+        if (
+          data.latestDeploymentID &&
+          data.latestDeploymentID !== this.currentDeploymentId
+        ) {
+          this.currentDeploymentId = data.latestDeploymentID;
+          this.showBuildLogs = true;
+          this.fetchBuildLogs();
+        }
+      } catch (err) {
+        console.error("Status fetch error:", err);
+      }
+    },
+
+    async fetchContainerLogs() {
+      try {
+        const res = await fetch(`/apps/${this.appId}/container-logs`);
+        const data = await res.json();
+        const newLogs = data.logs || "No logs available";
+        const changed = newLogs !== this.containerLogs;
+        this.containerLogs = newLogs;
+        this.containerStatus = data.status;
+        if (changed && this._containerAutoScroll) {
+          this.$nextTick(() => {
+            Alpine.store("utils").scrollToBottom(this.$refs.containerLogsWrapper);
+          });
+        }
+      } catch (err) {
+        this.containerLogs = "Failed to fetch logs";
+      }
+    },
+
+    async fetchBuildLogs() {
+      if (!this.currentDeploymentId) return;
+      try {
+        const res = await fetch(
+          `/apps/${this.appId}/deployments/${this.currentDeploymentId}/logs`,
+        );
+        const data = await res.json();
+        const newLogs = data.logs || "No build logs available";
+        const changed = newLogs !== this.buildLogs;
+        this.buildLogs = newLogs;
+        this.buildStatus = data.status;
+        if (changed && this._buildAutoScroll) {
+          this.$nextTick(() => {
+            Alpine.store("utils").scrollToBottom(this.$refs.buildLogsWrapper);
+          });
+        }
+      } catch (err) {
+        this.buildLogs = "Failed to fetch logs";
+      }
+    },
+
+    async fetchRecentDeployments() {
+      try {
+        const res = await fetch(`/apps/${this.appId}/recent-deployments`);
+        const data = await res.json();
+        this.deployments = data.deployments || [];
+      } catch (err) {
+        console.error("Deployments fetch error:", err);
+      }
+    },
+
+    submitDeploy() {
+      this.deploying = true;
+    },
+
+    get statusBadgeClass() {
+      return Alpine.store("utils").statusBadgeClass(this.appStatus);
+    },
+
+    get statusLabel() {
+      return Alpine.store("utils").statusLabel(this.appStatus);
+    },
+
+    get containerStatusBadgeClass() {
+      return (
+        Alpine.store("utils").statusBadgeClass(this.containerStatus) +
+        " text-xs"
+      );
+    },
+
+    get containerStatusLabel() {
+      return Alpine.store("utils").statusLabel(this.containerStatus);
+    },
+
+    get buildStatusBadgeClass() {
+      return (
+        Alpine.store("utils").statusBadgeClass(this.buildStatus) + " text-xs"
+      );
+    },
+
+    get buildStatusLabel() {
+      return Alpine.store("utils").statusLabel(this.buildStatus);
+    },
+
+    deploymentStatusClass(status) {
+      return Alpine.store("utils").statusBadgeClass(status);
+    },
+
+    deploymentStatusLabel(status) {
+      return Alpine.store("utils").statusLabel(status);
+    },
+
+    formatTime(isoTime) {
+      return Alpine.store("utils").formatRelativeTime(isoTime);
+    },
+  }));
+});