[Dashboard] Resume mode should require or warn about a missing application name

[IEvangelist]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When ApplicationName is missing or whitespace, DashboardRunStore falls back to the fixed name Aspire. Unrelated standalone Dashboard sessions using --persistence Resume and the same data root therefore reuse the same database.

The documentation demonstrates supplying a stable application name, but the CLI neither requires one nor warns that omission selects a shared per-user identity.

Expected Behavior

Resume should require a stable application name, derive a context-specific identity, or clearly warn that the default identity will reuse data across standalone sessions.

Steps To Reproduce

1. From one working directory, run aspire dashboard run --persistence Resume with an isolated data root.
2. Stop the Dashboard.
3. Repeat from an unrelated working directory with the same data root.
4. Both sessions use Aspire-6b6645454dc0e896/dashboard.db.

Exceptions (if any)

N/A

Aspire doctor output

Aspire CLI 13.6.0-pr.18924.g5ee63941
Ubuntu 24.04.3

Anything else?

Related to #18924. Source: src/Aspire.Dashboard/ServiceClient/DashboardRunStore.cs:105,538-545. The behavior remains on current main.

[joperezr]

🤖 Aspire triage pass — 2026-08-28 19:30 UTC

Area: area-dashboard, area-cli
Kind: bug
Repro: yes-minimal — see the Steps To Reproduce section
Affected version(s): 13.6.0-pr.18924 (pre-release; feature unshipped — latest shipped line: 13.5.x)
Severity: S3 — Resume falls back to a shared default identity so unrelated sessions reuse the same DB; workaround: pass a stable application name

Urgency: ⚪ backlog — no milestone
Reason: follow-up bug on the unshipped Resume feature (PR #18924); data-collision (not a leak), workaround exists, not a regression. Backlog while 13.6 stabilizes (open milestones: Backlog / 13.5.x / 13.6 / 14.0).

Suggested owner(s): James Newton-King (@JamesNK) (primary), backup Adam Ratzman (@adamint)
Evidence:

• James Newton-King (@JamesNK) is the top recent contributor in area-dashboard — merged Add SQLite persistence and run history to the Dashboard #18924 (the persistence/resume feature these follow-ups derive from), plus Harden Markdown URL validation #19698, Use SQLite for dashboard telemetry filtering #19661, Fix dashboard resource subscription race #19534 and ~37 more in the last 90d
• James Newton-King (@JamesNK) closed [15.5] Filtering metrics by dimensions doesn't work as expected #19046, File input: Localize validation messages in InteractionsInputDialog #18660, Streaming Http Telemetry API doesn't work if you start streaming before telemetry arrives. #17802 (and 14 more) as completed in area-dashboard (last 180d)
• backup Adam Ratzman (@adamint): 10 recent area-dashboard merges (Revert "Update parent resource state from replicas (#18642)" #19545, Fix Dashboard HTML language under invariant culture #19331, Fix dashboard accessibility regressions #19027 …) and 10 closed-completed issues
• CODEOWNERS has no path-specific entry for these files
• James Newton-King (@JamesNK) also leads area-cli (40 merged PRs last 90d); Adam Ratzman (@adamint) backup (13)

Confidence: high
Needs human?: no

[JamesNK]

Using the default is fine. Only change here would be clear docs when it’s missing