fix(containers): address review feedback on Stats tab

- I1: cancel child process on timeout using AbortController; guard polls
  with inFlight flag so concurrent calls cannot stack up
- I2: clean up session when renderer WebContents is destroyed (handles
  hard reloads / crashes that bypass onBeforeUnmount)
- I3: emit container-stats/stopped to renderer before clearing sessions
  in stopAll so the tab does not freeze on last sample after engine change
- I4: call resetBuffers on every isContainerRunning transition so prior-run
  samples do not bleed into a new container lifecycle
- I5: gate Stats tab on Moby engine; show informational banner otherwise
- S1: divide NetIO / BlockIO deltas by refreshSeconds to plot bytes/s rate
- S2: waitForCharts also waits for a process-table row (proves data arrived)
- S3: replace whitespace-split tokenizer with column-position parser so
  multi-word header fields (e.g. START TIME) are handled correctly
- S4: parsePair is explicit when no separator is present
- S5: reset prevNet*/prevBlock* in restartPolling to avoid spike on rate change
- S6: log non-JSON docker stats output instead of silently discarding it
- S7: track memory limit as a second dashed dataset for context
- S8: use exact version pins for chart.js and vue-chartjs (match project convention)
- S10: read chart palette from CSS custom properties with hardcoded fallbacks
- S11: make process-table and refresh-select e2e tests navigate independently
- S12: extract sendToFrame into shared main/ipcUtils.ts; use in both
  containerStats.ts and containerExec.ts

Signed-off-by: Gildas Le Nadan <3ntr0p13+github@gmail.com>

Author: endemics

e2e/containers.e2e.spec.ts

@@ -605,12 +605,14 @@ test.describe.serial('Container Stats Tab', () => {
   });
 
   test('process table shows at least one row', async() => {
-    const statsPage = new ContainerStatsPage(page);
+    const statsPage = await navigateToStatsTab(runningContainerId);
     await expect(statsPage.processTable.locator('tbody tr').first()).toBeVisible({ timeout: 15_000 });
   });
 
   test('refresh rate select has the correct options', async() => {
-    const statsPage = new ContainerStatsPage(page);
+    const statsPage = await navigateToStatsTab(runningContainerId);
+
+    await expect(statsPage.refreshSelect).toBeVisible({ timeout: 15_000 });
     const options = await statsPage.refreshSelect.locator('option').allTextContents();
 
     expect(options).toEqual(['1 s', '5 s', '10 s', '20 s', '30 s', '1 min']);

e2e/pages/container-stats-page.ts

@@ -34,5 +34,7 @@ export class ContainerStatsPage {
     await expect(this.memoryChart).toBeVisible({ timeout });
     await expect(this.networkChart).toBeVisible({ timeout });
     await expect(this.ioChart).toBeVisible({ timeout });
+    // Wait for at least one poll cycle to complete (process table row proves data arrived).
+    await expect(this.processTable.locator('tbody tr').first()).toBeVisible({ timeout });
   }
 }

package.json

@@ -63,7 +63,7 @@
     "@xterm/addon-web-links": "0.12.0",
     "@xterm/xterm": "6.0.0",
     "async-mutex": "^0.5.0",
-    "chart.js": "^4.4.9",
+    "chart.js": "4.5.1",
     "cookie-universal": "2.2.2",
     "cross-spawn": "7.0.6",
     "dayjs": "1.11.20",
@@ -86,7 +86,7 @@
     "tar-stream": "3.2.0",
     "vue": "3.5.34",
     "vue-3-slider-component": "1.0.2",
-    "vue-chartjs": "^5.3.2",
+    "vue-chartjs": "5.3.3",
     "vue-router": "5.0.7",
     "vue-select": "3.20.4",
     "vuex": "4.1.0",