Add unzip to Docker base packages, refactor API key handling, improve self-update system

- Add unzip package to Docker base installation
- Remove deprecated missing API key banner extension
- Refactor API key management: clear drafts on init, track dirty state, allow empty string saves
- Add version filtering to self-update: enforce minimum v0.9.9, validate tag format
- Improve self-update UI: convert howto to Bootstrap collapse, fix branch selector reactivity, group tag suggestions
- Fix settings

plugins/_model_config/webui/api-keys.html

@@ -22,6 +22,7 @@
        },
        async init() {
          await $store.modelConfig.ensureLoaded();
+         $store.modelConfig.resetApiKeyDrafts();
          await $store.modelConfig.refreshApiKeyStatus();
          $store.modelConfig.allProviders.forEach((provider) => {
            this.keys[provider.value] = '';
@@ -50,9 +51,7 @@
            const updates = {};
            for (const provider of Object.keys(this.touched)) {
              if (!this.touched[provider]) continue;
-             const value = (this.keys[provider] || '').trim();
-             if (!value) continue;
-             updates[provider] = value;
+             updates[provider] = this.keys[provider] || '';
            }
            await $store.modelConfig.saveApiKeys(updates);
            await $store.modelConfig.refreshApiKeyStatus();